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,_._ . IDepar'tment Of T ree United States Agriculture North Central Research" stF°rtestnExperi meat Paper. NC-220 /omass " _o_:_:e in the No/-th Central Region / _-_J/ Gerhard K. Raile and Pamela J. Jakes North Central _Forest Experiment Station Forest Service--U.S. Department of Agriculture 1992 Folwell Avenue St. Paul, Minnesota 55108 Manuscript approved for publication April 12, 1982 1982 ° J FOREWORD Resources Evaluation is a continuing endeavor as mandated by the Forest and Rangeland Renewable Resources Planning Act of 1974 (RPA). Its objective is to periodically inventory the Nation's forest land to determine its extent, condition, and volume of timber, growth, and depletions. This kind of up-to-date information is essential to frame intelligent forest policies and programs. USDA Forest Service regional experiment stations are responsible for conducting these inventories and publishing summary reports for individual States. The North Central Forest Experiment Station is responsible for evaluating the forest resources of Illinois, Indiana, I0wa, Kansas, Michigan, Minnesota, Missouri, Nebraska, North Dakota, Eastern South Dakota, and Wisconsin. Resource bulletins analyzing findings from the most recent forest inventory are available from the Station for most north central States. Updated 1977 forest statistics for each State are found in the RPA assessment document, "An Analysis of the Timber Situation in the United States 1952-2000," available from USDA Forest Service, Washington, D.C. The following North Central Forest Experiment Station office personnel assisted in preparing the tables and manuscript: Mary Jean Hanson, Secretary; Patrick Peine, Statistical Assistant; and Joan Stelman, Statistical Assistant. . ' CONTENTS Page Methods .. ............................................ Results ............................................... Discussion ............................................ Summary ............................................. Literature Cited ....................................... Tables ................................................ 1 2 5 7 7 8 o TREEBIOMASS IN THE NORTH CENTRAL REGION Gerhard K. Raile, Associate Mensurationist, and Pamela J. Jakes, Associate Resource Analyst ' Recent changes in the Nation's forest resource picture have forced recognition of whole-tree utilization as a viable forestry practice. Increasing demand for wood fiber, increasing harvesting and production costs, and increasinginterest in alternative forms of energy/are just a few of the developments that have spurred interest in total aboveground tree volume. This interest is.becoming evident in the North Central Region. The Minnesota Department of Natural Resources and the Minnesota Energy Agency have released a report on the feasibility of using wood biomass for energy (Minnesota Department of Natural Resources t980). The study concluded that in Minnesota, wood _'could supply a substantial portion of the energy needed for residential heating now and in the future." A study released by the Lake Superior Populus Studies Center presents a plan the utilizing Basin species (particularly aspen) in for upper Great Lakes States (Wood 1980). The report includes an analysis of the use of aspen for food, direct combustion, gasification, and alcohol production. in a 1975-1976 study of Minnesota logging uti]iZati0n factors, five logging firms were producing Whole tree chips--in the previous study, dated 1960' 1961, no firms had whole tree chip operations (Blyth and Smith 1980). Until recently, timber management and wood procuremen_ decisions could not be made on a whole tree basis because only traditional measures of merchantable volume in cubic and board feet were available. What was needed was a way to estimate the amount of wood and bark 'contained in the whole tree, including the crown. A biomass committee has been formed through the Renewable Resources Evaluation (RRE) Projects at USDA Forest Service forest experiment stations to estimate aboveground tree volume (in green tons) on commercial forest land _nationwide using current state-of-the-art methodology. 2 This is a first step in including estimates of tree biomass in standard forest inventory efforts. The RRE Project at the North Central Forest Experiment Station estimated tree biomass on commercial forest land in 11 States-Illinois, Indiana, Iowa, Kansas, Michigan, Minnesota, Missouri, Nebraska, North Dakota, Eastern South Dakota, and Wisconsin. For each State, tree biomass was estimated by (1) softwoods and hardwoods and biomass component, (2) species groups and diameter class, and (3) softwoods and hardwoods and ownership class. A summary of a methodology for quantifying the biomass and estimates of the biomass for the North Central Region are presented here. METHODS Equations are currently available that estimate tree biomass, however, these equations were unacceptable for estimating tree biomass in the North Central Region. First, many of the equations require data unavailable for most of the north-central States. Data limitations in most States made it necessary to develop equations requiring only the number of _Commercial forest land is forest land that is producing or is capable of producing crops of industrial wood and not withdrawn from timber utilization by statute or administrative regulation. 2Bones, James. 1980. Unpublished study plan--A plan for compiling aboveground tree biomass estimates for the United States. On file at the North Central Forest Experiment Station, Renewable Resources Evaluation Project. growing-stock 3 and cull 4 trees by 2-inch diameter class: Second, some existing equations give estimates Outside the range of the data the equations. For large diameter trees in different equations give widely different of tree biomass, unreliable used to fit particular, estimates each species and an average bark weight of 37 pounds per cubic foot. The weight in the tops and limbs of growing-stock and cull trees was estimated as 45 percent of the gross bole weight (Young et al. 1976). " Finally, the biomass for trees from 1 to 5 inches in diameter was computed by a regression equation fit to Young's tree weight table (Young et al. 1976). This regression equation used d.b.h. (diameter at breast height) to estimate total aboveground tree biomass as 80 percent of the total above- and belowground biomass. All other States: Data from the 1977 Assessment for the Renewable Resources Planning Act (RPA) and the most recent State inventories were used to determine the number of growing-stock and cull trees by species group and 2-inch diameter class (USDA Forest Service 1980). For each species group in each State, biomass by component and 2-inch diameter class was computed for all trees at least 1 inch in diameter using the following equation: W = A(d.b.h.) B where W is the component weight in green tons per tree and A and B are regression parameters. Nonlinear regression techniques were used with biomass data from Minnesota, North Dakota, and Wisconsin to determine the regression parameters 7 (table 1). Finally, most of the existing equations do not estimate weight by components as defined by the RRE Projects. RRE estimates of tree biomass include the bark, and are made up of five components: 1. Growing-stock bole--the aboveground volume of growing-stock trees 5 inches'or more in diameter from a 1-foot stump to a variable 4-inch diameter top; 2 _Growing-stock top and limbs--the aboveground volume of growing-stock trees 5 inches or more in diameter from a 1-foot stump, excluding the growing-stock bole; 3.-Cull tree bole--the aboveground volume of cull trees 5 inches or more in diameter from a 1-foot stump to a fixed 4-inch diameter top; 4. Cull tree top and limbs--the aboveground volume of cull trees 5 inches or more in diameter from a 1-foot stump, excluding the cull bole; 5. 1-to 5-inch trees--the total aboveground volume of all trees 1 to 5 inches in diameter. Data available from State-wide forest inventories for estimating tree biomass vary across the Region; therefore,it is necessary to use two different methods for estimating tree biomass--one for North Dakota and Minnesota and another for all other States. North Dakota and Minnesota: New forest inventories in North Dakota (1980) and Minnesota (1977) 5 enabled us to use gross cubic foot volume, net cubic _foot volume, and bark correction factors 6 to estimate tree biomass. For each tree, the net cubic foot volume in the bole was converted to green tons using weight conversion factors for individual species (Markwardt 1930). Then, the weight of the bole bark was computed using bark correction factors for 3Growing-stock trees are all live trees 1-inch d.b.h. and larger, except cull trees, 4Cull trees are rotten or rough trees. Rotten trees are live trees 1-inch d.b.h, and larger of commercial species that do not contain a merchantable 12-foot saw log, now or prospectively, because of rot. Rough trees are live trees of any size that do not contain at least one merchantable 12-foot saw log, now or prospectively, because of roughness, poor form, or noncommercial species, . . RESULTS Tree biomass in the North Central Region totals 3.6 billion tons. The distribution oftree biomass among biomass components is different for softwoods and hardwoods (table 2). For softwoods, 23 percent of the total tree biomass is in from 1- to 5-inch trees, but this component accounts for only 15 percent of the total tree biomass for hardwoods (fig. 1). A larger percentage of the hardwood tree biomass is in cull trees (17 percent) than for softwoods (5 percent). 5Includes 1979 data for the Superior National Forest. 6Unpublished data on file at the North Central Forest Experiment Station, Renewable Resources Evaluation Project. 7Biomass data from these three States consisted of green weight by biomass component, species group, and 2-inch diameter class. Data from the 1968 Wisconsin inventory were used for cottonwood and hemlock. SOFTWOOD TREE BIOMASS = 637 MILLION GREEN TONS -1-5 INCH TREES GROWING-STOCK TREES CULL TREES 24O/o TOPS AND LIMBS 2O/o 23% J 72O/o TOTAL 5O/o • HARDWOOD TREE BIOMASS = 2,922 MILLION GREEN TONS 1-5 INCH TREES GROWING-STOCK TREES CULL TREES • 2% TOPS AND LIMBS 7% 4o,o 15°/o Figure 1.--Distribution biomass components, 68°/o TOTAL of the biomass by softwoods North Central Region. The distribution of tree biomass among components also variesby geographic unit (fig. 2). In the Lake States (Michigan, Minnesota, and Wisconsin), where-a large portion of the region's softwood trees are found, only 12 percent of the total tree biomass is in Cull trees. In the units in which hardwoods accounl_ for a large portion of the total number of trees, a larger portion of the total tree biomass is in cull trees--21 percent of the tree biomass in the Central States (Illinois, Indiana, Iowa, and Missouri) ' is in cull trees as is 36 percent in the Prairie States (Kansas, Nebraska, North Dakota, and Eastern South •Dakota). The average tree biomass per acre of commercial forest land in the North Central Region is 50 tons. Average tree biomass per acre by State ranges from a low of 45 tons per acre in Illinois to a high of 57 ' tons per acre in Indiana. lO% 17% and hardwoods and • In the Central States, the oaks account for the majority of the tree biomass (table 3). Of the 1,049 million green tons found in the Unit, 303 million tons are white oaks and 276 million tons are red oaks. Sol, woods total only 33 million green tons, most of which is found in loblolly and shortleaf pine species. Although a larger portion of the tree biomass in the Lake States Unit is in softwoods than in the other units, hardwoods still make up a majority of the total. Of the 2,386 million tons of total biomass, 1,794 million are in hardwoods. Aspen and cottonwood species account for 369 million tons, hard maple for 252 million, red oak for 245 million, and birch for 243 million (table 4). Softwood tree biomass totals 591 million green tons, with balsam fir accounting for 136 million green tons and jack pine for 104 million. GROWINGSTOCK BOLES (48%) •LAKE STATES (2,386 MILLION TONS) No.. ..o,a O CULL TREES (12°/°) 1-5 INCH TREES GROWINGSTOCK TOPS AND LIMBS (23%) (17%) SOuth Dakota PRAIRIE STATES (124 MILLION TONS) Ne bras ka .... GROWING-STOCK BOLES (370/0 ) CENTRAL STATES (1,049 MILLION TONS) . GROWINGSTOCK TOPS AND LIMBS GROWINGSTOCK BOLES (44%) (18%) , -5 INCH CULL TREES (370/0) 1-5 INCH TREES (15°/°) GROWINGSTOCK TOPS AND LIMBS (20o/o) CULL TREES (21%) Figure 2.reDistribution 1978. . of tree biomass by biomass component and unit, North Central Region, Tree biomass in the Prairie States is scattered across anumber of tree species with no single species accounting for a large portion of the total (table 5). The 124 million green tons found in the Unit is concentrated in hardwoods (112 million green tons). Ponderosa pine accounts for most of the softwood biomass volume. In all unitS, most tree biomass is privately owned (tables 6-8). Public owners hold a larger percentage of the softwood than hardwood biomass in all units: 4 Ownership class Public Central States 39 Softwood Hardwood biomass biomass (Percent) 12 Private Public Private Public 61 Lake States 47 53 88 34 66 PrairieStates Private 37 63 94 6 • " The RRE definitions of biomass for trees larger than 5 inches in diameter exclude a 1-fo0t stump. To The tree biomass for each State is correlated.to __fully calculate the aboveground biomass of a tree, the tree volume, size, and species found in the State. the volume in the stump must be known. Raile (1981). -The States with the highest growing-stock volumes - developed a method for estimating the volume in per acre generally have the highest tree biomass stumps of various heights for any tree diameter. In weights per acre. Because the weight per cubic foot the tabulation below, we used this method to estiof wood varies widely byspecies group, small differmate the weight of a 1-foot stump for an average ences in the species composition of forests among the softwood or hardwood growing-stock tree across a Statescan result in large differences in the total tree range of diameters. Stump weight is given as a perbiomass: centage of the Weight of the growing-stock bole: : Stump eight percent weight w asa ofthe Green weight f o D.b.h. inthegrowing-stock bole aboveground treebiomass (inches) Softwoods Hardwoods Species group (Pounds ercubic p foot) s 610.2 15.8 Softwoods 8 9.0 12.6 Jackpine 50_ 10 8.2 10.7 Red-pine 42 " 12 7.5 9.4 Loblolly-shOrtleaf pine 53 14 7.0 8.5 White spruce 35 16 6.6 7.8 Blackspruce 32 18 6.3 7.2 Balsamfir 45 20 6.0 6.8 Northern white.cedar 28 22 5.8 6.5 Othersoftwoods 50 24 5.6 6.1 . Hardwoods 26 5.4 5.9 White oak 62 28 5.2 5.7 Redoak 63 30 5.1 5.5 Hickory 63 • Hard maple 56 For example, the weight of a 1-foot stump for a 6Softmaple 50 inch d.b.h, hardwood growing-stock tree is 15.8 perAspen-cottonwood 43 cent of the bole biomass. Birch 50 Other ardwoods h 50 Estimates of tree biomass can be used in conjunction with timber removals data to estimate the , DISCUSSION • In Indiana, with the highest tree biomass per acre, red and white oaks account for 24 percent and hickory for 16. percent of the total number of growingstock trees. Therefore, 40 percent of Indiana's trees are in the three species groups with the most dense wood. In Illinois, the species composition is similar to that found in Indiana, but the number of trees per acre of commercial forest land is so low that tree biomass per acre is the lowest in the Region. As tree size increases linearly, weight per tree increasesexponentially (fig. 3). For example, if oak diameter increases from 6 to 12 inches, the biomass per growing-stock tree increases 490 percent and the biomass per cull tree increases 590 percent. The increase in aspen and cottonwood growing-stock biomass per tree is even more dramatic. In this species group, an increase in diameter from 6 to 12 inches results in an 820 percent increase in growing-stock biomass per tree. . SAdopted from L. J. Markwardt (1930). amount of wood left in forests after conventional logging operations. In 1976, growing-stock removals from commercial forest land in the North Central Region totaled 1,109 millionand 916feet--195 cubic feet cubic cubic million million from feet from softwoods hardwoods. Of this total, only 54 percent was used for products: 1976 growing-stock removals Softwoods Hardwoods Item (Million cubic feet) Products 152 554 Logging residue Otherremovals 9 4 39 195 57 305 916 The 706 million cubic feet used for products is equal to 22 million green tons. By definition growing-stock removals come only from the boles of grow9Other removals are (1) growing-stock volumes removed during land clearing and timber stand improvement work but not utilized for products, and (2) volumes lost as a result of changes in land use. 1"00 I ._)0 .80 . .70 .60 - BOLES CULL TREES .80 .70 .60 .50 - TOPS AND LIMBS CULL TREES .50 .40 .30 - WIll .40 WH OD .3.0 - .10 .20 - , 1 I I I I I I I I .10 .20 - _ I I I I ASPEN-COTTONWOOD ! I I I I _ ._ 1.60 . .80 GROWING-STOCK TREES GROWING-STOCK TREES _ 1.50 (,,-1 tu LU 1_40 _ _ 1.30 1.20 .70 .60 _ 1.i0 1.00 .90 .80 WHITE OAK .70 .60 .50 •40 ASPEN-COTTONWOOD .30 .20 .10 I I l i 7.0- 9.0- 11.0- 13.0- 15.0- 17.0- 19.08.9 10.9 12.9 14.9 16.9 18.9 20.9 • 1.04.9 5.0- 7.0- 9.0- 11.0- 13.0- 15.0- 17.0- 19.06.9 8.9 10.9 12.9 14.9 16.9 18.9 20.9 .10 .20 ASPEN-COTTONWOOD .30 .40 WHITE OAK .50 1.04.9 5.06.9 DIAMETER CLASS (INCHES) Fiigure 3._Green aspen-cottonwood, weight.per North tree by diameter Central Region. class and biomass component, white oak and " 6 ing-stock trees, and boles account for an average of 68 percent of the total growing-stock tree biomass. This rneans that on the average, 32 percent of the total tree biomass is left in forests following harvest, In the North Central Region in 1976 an estimated !0 million green tons of tops and limbs were left following removal of the growing-st0ck boles for products. In addition, more than 2 million green tons of logging residue were !eft. Logging residue is unused portions of the bole from cut growing-stock trees plusunused growing-stock trees killed by logging, Therefore, 12 million green tons of tree biomass are available for energy production or new forest products without jeopardizing current supplies, As mentioned earlier, many opportunities exist for Using tree biomass to help alleviate some of the Nation's energy problems: burning wood provides an alternative way to heat homes and buildings or generate electricity, wood-derived chemicals can be used as petroleum substitutes, and wood products can be subStituted for energy-intensive metals and plastics. Current use of woody biomass for energy is about 1.3 quads, _°or 2 percent of the Nation's energy budget, By i990,, energy from woody biomass could be 6.4 quads, or about 8 percent of the Nation's energy budget (USDA Forest Service 1980). The amount of energy available per pound of wood is fairly consistent across species groups. Wood at 20 percent moisture content produces approximately 6,400 Btu's per pound of wood (Agricultural Extension Service 1979). However, the energy available per unit volume of wood varies because species that are more dense have more pounds of wood per unit volume. The available heat units (in million Btu's pe r cord of 90 solid cubic feet) of wood and bark are shown below for several north-central species (Hen' dricks 1974). " The energy content of tree biomass in the North Central Region is 26.3 x 10_ Btu's. Hardwoods account for 80 percent of the energy potential. The energy content of the 12 million green tons of unused tops and limbs and logging residue is approximately ,92.4 X 10 TMBtu's. SUMMARY The estimates of tree biomass presented here are a first step toward estimating total woody biomass on commercial forest land. The next step will entail estimating woody biomass in the forest understory. Methods for calculating biomass of the major northcentral shrub species are currently being refined and evaluated by Project scientists. The Project anticipates using the method described above to estimate tree biomass as part of the standard forest inventory in each State. LITERATURE CITED Agricultural Extension Service. Heating the home with wood. Extension Bulletin 436. University of Minnesota; 1979. p. 15. Blyth, James E.; Smith, W. Brad. Minnesota logging utilization factors, 1975-1976--development, use, implications. Resour. Bull. NC-48. St. Paul MN: U.S. Department of Agriculture, Forest Service, North Central Forest Experiment Station; 1980. 8 p. Hendricks, Lewis T. Wood as a fuel resource. Forestry Fact Sheet 9. Agricultural Extension Service, University of Minnesota; 1974. Markwardt, L. J. Comparative strength properties of woods grown in the United States. Tech. Bull. 158. Washington, D.C." U.S. Department of Agriculture; 1930. 38 p. • Species •Redpine White pine Hemlock Whiteoak Redoak Hickory. Aspen Air-dry1' Green (Million Btu's per90solid cubic feet) 17.8 14.2 15.0 23.9 21.7 24.8 14.1 16.8 12.9 12.8 22.4 19.6 23.1 12.2 Minnesota Department of Natural Resources.Min- nesota Wood Residue Studies; 1980. p. vi. Raile, Gerhard K. Estimating stump volume. Res. Pap. NC-224. St. Paul, MN: U.S. Department of Agriculture, Forest Service, North Central Forest Experiment Station; (In prep.). Paperbirch Elm i 18:2 17.7 16.7 15.8 Units 1°One quad = 1.0 X 1015British Thermal (Btu's). liFrom 15 to 20 percent moisture. ' U.S. Department of Agriculture, Forest Service. An analysis of the timber situation in the United States, 1952-2030. Appendix 3; 1980. p. 84-87. 7 Wood, Thomas J. A plan for the development of Populus species utilization project in the Upper Great Lakes States of Michigan, Wisconsin, and Min" nesota--Final Report. Lake Superior Basin Studies Center, University of Minnesota, Duluth, for the Upper Great Lakes Regional Commission; 1980. 47p. Young, H. E.; Hoar, L. E.; Tryon, T. C. A forest biomass inventory of some public land in Maine. In: Oslo Biomass Studies. Life Sciences and Agricultural Experiment Station. University of Maine, Orono; 1976. p. 285-302. Table l.--Biomass equation parameters Biomass Component Growing stock Boles Species A B Tops and limbs A B x 10-3 .453 1.410 .132 .236 .197 .266 .225 .668 .138 1.336 .485 .443 1.940 .600 .365 .459 .269 .110 .383 .609 .407 Boles A x 10-3 .646 1.844 .077 .118 .316 .001 .093 .031 .134 .184 .419 .468 .221 .109 .736 1.124 .117 1.150 1.084 5.725 .942 B Cull Tops and limbs A B x 10-3 .720 2.083 .059 .153 .074 .002 .099 .042 .146 .148 .320 .363 .176 .078 .582 .139 .930 .876 .807 .322 .749 x 10-3 Jack pine I.959 Red pine _1/ 1.453 White pine .539 White spruce .392 Black spruce .190 Balsam fir .706 Hem]ock .337 Tamarack .650 Northern white-cedar .384 Other softwoods 1.066 Select white oak 1.996 Select red oak 1.451 Select hickory 5.274 Beech 2.476 Hard maple .792 Soft maple 1.072 Ash .926 A spen-cottonwood .119 Birch 4.294 Yellow poplar 2.424 Other hardwoods 1.147 1# 2.1457 2.2749 2.5895 2.6898 2.8971 2.5404 2.7915 2.5857 2.5461 2.3170 2.2276 2.3582 1.8599 2.1046 2.5477 2.3888 2.3419 3.1213 1.8932 2.1077 2.3659 2.4197 2.0285 2.8060 2.6177 2.7108 2.6321 2.6652 2.3282 2.7198 1.8396 2.4591 2.5155 1.9741 2.3265 2.5440 2.4164 2.6291 2.9053 2.5301 2.3201 2.4564 2.2562 1.8345 3.0459 2.7082 2.3167 4.5421 2.9225 3.3055 2.6150 2.7407 2.5684 2.5535 2.8099 2.9984 2.3281 2.1090 2.1310 2.1194 2.2015 1.6789 2.2122 2.2633 1.8429 3.0415 2.7497 3.0300 4.5427 2.9265 3.3107 2.6229 2.7578 2.5687 2.5537 2.8005 2.9991 2.3264 2.7753 2.1301 2.1207 2.1970 1.6273 2.2100 -_IRed pine parameters were used for ponderosa and loblolly-shortleaf pine species groups. 8 .Table 2.--Total green weiqht of aboveground tree biomass on commercial forest land by State, softwoods and hardwoods, biomass component, and Unit (In thousand qreen tons) CENTRAL STATES Biomass component Growing-stock State III inois Softwoods Hardwood s Total Indiana .Soft woods Hardwoods Total Iowa Softwoods Hardwoods TotaI Missouri Softwoods Hardwoods Total IInittotals Softwoods Hardwoods • Total • Michigan Softwoods .Hardwoods Total Minnesota Softwoods Hardwoods Total Wisconsin Softwood s Hardwoods Total IInit totals Softwoods Hardwoods Total : Kansas Softwoods Hardwoods • T.otal Nebraska Softwoods Hardwoods TotaI ' North Dakota Softwoods Hardwoods Total South .Dakota Softwoods Hardwoods Tota I Unit totals Softwoods Hardwoods Tota I AlI components 2,138 165,1(13 167,241 4,924 21(1,971 215;895 578 75,354 75,932 25,585 564,485 59(1,(17(1 33,225 I,(115,913 1,(149,138 I"-5" trees 5(19 14,963 15,472 1,280 25,7(15 26,9F_5 147 8,F_82 9,(129 5,F_22 99,865 1(15,687 Boles 90(I Rg, F_65 90,765 2,299 110,232 112,531 206 34,(16(1 34,266 11,978 216,260 22F_,238 Tops and limbs 486 41,052 41,538 I, (I73 5(1,7(1n 51,773 91 15,624 15,715 6,48_R 9.5,349 1(11,837 8,13F_ 202,725 21(1,863 Boles I 17 I0 ,F_52 10,969 145 13,F_15 13,960 72 9,434 9,506 678 86,272 86,950 1,012 12(1,373 121,385 Cull Tops and limbs 126 8,371 F_,497 127 I(1,51q 1(1,646 62 7,354 7,416 619 66,739 67,3.58 934 92,983 93,917 . 7,758 15,383 149,415 450,417 157,173 465,F_(10 LAKE STATES .55,(139 126,717 IF_1,7.56 56, (147 79,469 135,516 26,nn5 69,.57q q5,534 137,(1Q1 275,715 412,8(16 125,432 390,2(12 515,634 F_(1,160 222,nF_6 3(12,246 R2,461 256,(15n 33F_,511 28F_,n53 F_68,338 1,156,391 , 2.52,.569 777,91RFI I,(130,557 183,475 477,442 66(1,q17 155,333 53F_,F_39 694,172 591,377 1,794,269 2,385,646 61,417 178,2(19 239,626 3R, 436 1(18,571 147,(1(17 39,297 115,316 1.54,613 139,15(1 402,(196 541,246 5,114 47,134 52,248 5,231 38,897 44,12F_ 3,691 55,615 .59,3(16 14,(136 141,646 155,682 5,567 35,726 41,293 3,601 28,41q 32,(12(1 3, _79 42,329 46,2(18 13,047 106,474 119,521 PRAIRIE STATES 90 58,126 58,216 10,279 28,487 38,766 72 15,903 15,975 ' 1,886 .. 9,637 11,523 12,327 112,153 124,480 13 5,628 5,641 662 616 1,278 6 2,720 2,726 252 479 731 933 9,443 10,376 15 17,799 17,814 5,908 11,835 17,743 43 5,979 6,022 964 3,858 4,822 6,930 39,471 46,401 7 8,270 8,277 3,149 5,707 8,856 19 2,841 2,860 545 1,906 2,451 3,720 18,724 22,444 31 14,834 14,865 260 5,819 6,079 3 2,763 2,766 59 1,908 1,967 353 25,324 25,677 24 11,595 11,619 300 4,510 4,810 1 1,600 1,601 66 1,486 1,552 391 19,191 19,582 . 9 , Table 3.--Total green weight of ahoveground tree biomass on commercial forest land by species group, diameter, class and biomass component, Central States (In thousand green tons) LOBLOLLY-SHORTLEAF PINE Biomass component Growing-stock Species group 1.0" - 4.9" 5.0" - 6.9" 7.0" - 8.9" 9.0"- 10.9" 11.0"- 12.9" 13.0"- 14.9" 15.0"- 16.9" 17.0" - 18.9" 19.0" - 20.9" 21.0" - 28.9" 29.0" - over Total 1.0" 5.0" 7.0" 9.0" 11.0"13.0" 15.0" 17.0" 19.0"4.9" 6.9" 8.9" 10.9" 12.9" 14.9" 16.9" 18.9" 20.9" AlI components 4,038 3,875 4,807 4,193 3,145 1,314 447 251 67 -......... .......... ' 22,137 3,720 1,965 1,858 1,419 891 483 302 127 75 128 120 I I, 088 4.9" 6.9" 8.9" 10.9" 12.9" 14.9" 16.9" 18.9" 20.9" 28.9" over 7,758 5,840 6,665 5,612 4,036 1,797 749 378 142 128 120 33,225 4.9" 6.9" 8.9" 10.9" 12.9" 14.9" 16.9" 18.9" 20.9" 28.9" over 33,186 33,821 38,889 42,520 40,296 39,213 26,992 17,279 11,042 16,728 3,017 302,983 24,384 23,917 31,822 39,539 37,678 33,062 27,002 19,389 13,994 21,994 3,522 276,303 _ Boles 1,823 2,196 2,955 2,671 2,037 855 300 165 42 Tops and limbs 1,309 1,371 1,719 1,470 1,072 433 147 78 20 Boles 423 143 61 24 17 12 .... 4 2 CuIl TOps and limbs 483 165 72 28 19 14 4 3 13,044 OTHER SOFTWOODS 1,995 1,096 1,077 764 481 283 178 86 31 93 73 7,619 1,457 584 501 319 184 100 59 27 10 25 19 686 147 156 152 183 123 54 35 7 19 5 15 896 570 299 213 207 140 66 35 II 21 5 15 I, 582 5,016 3,952 4,126 5,356 5,463 5,380 4,399 3,215 2,518 4,631 804 44,860 3,488 2,998 4,006 5,147 5,197 4,489 4,074 3,145 2,623 4,773 1,052 40,992 3 continued 788 121 129 128 153 103 46 30 7 15 5 13 750 604 294 200 181 122 60 30 II 18 5 13 I, 538 3,834 3,023 3,157 4,097 4,178 4,116 3,366 2,460 1,926 3,543 616 34,316 2,705 2,326 3,108 3,994 4,033 3,484 3,162 2,440 2,036 3,705 816 31,809 on next page) 21.0" - 28.9" 29.0"over Tota I 1.0" 5.0" 7.0" 9.0'II.0" 13.0"15.0" 17.0" 19.0" 21.0" 29.0" - 6,157 3,285 TOTAL SOFTWOODS 3,818 3,292 4,032 3,435 2,518 1,138 478 251 73 93 73 19,201 WHITE OAK 18,381 19,625 22,685 23,383 21,407 20,527 13,154 7,870 4,439 5,676 1,044 158,191 RED OAK 13,277 13,235 17,357 21,129 19,600 17,155 13,425 9,319 6,269 8,990 1,089 140,845 2,766 1,955 2,220 1,789 1,256 533 206 105 30 25 19 I0,904 5,955 7,221 8,921 9,684 9,248 9,190 6,073 3,734 2,159 2,878 553 65,616 4,914 5,358 7,351 9,269 8,848 7,934 6,341 4,485 3,066 4,526 565 62,657 (Table • Tota I 1.0" 5.0" 7.0" 9.0"Ii.0" 13.0"15.0"17.0"19.0"21.0"29.0" Tota I 1.0" 5.0" 7.0" 9.0"II.0" 13.0"15.0"17.0"19.0"21.0"29.0"Tota I 4.9" 6.9" 8.9" 10.9" 12.9" 14.9" 16.9" 18.9" 20.9" 28.9" over 10 (Table 3 continued) HICKORY Biomass component Growinq-stock Species group 1.0" - 4.9" 5.0" - 6.9" 7.0" - 8.9" 9.0"- 10.9" 11.0"- 12.9" 13.0"15.0"14.9" 16.9" AlI components 41,200 25,745 22,348 19,289 13,684 9,409 6,161 1,647 3,433 1,589 150 144,655 • 3,470 3,228 3,555 3,687 3,068 3,570 2,851 2,095 1,321 2,068 222 29,135 4.9" 6.9" 8.9" 10.9" 12.9" 14.9" 16.9" 18.9" 20.9" 28.9" over 2,961 2,479 2,858 3,065 3,389 3,153 2,485 1,697 1,425 3,487 1,277 28,276 5,243 4,660 4,678 4,111 3,583 2,548 1,868 1,391 843 1,250 146 30,321 4.9" 6.9" 8.9" 10.9" 12.9" 14.9" 16.9" 18.9" 20.9" 28.9" over 235 424 317 316 285 439 218 167 93 167 60 2,721 Boles 25,712 16,005 13,465 11,305 7,720 5,388 3,442 836 1,827 762 67 86,529 HARD I_APLE 1,826 1,897 2,012 2,106 1,707 1,955 1,584 1,022 621 796 42 15,568 SOFT MAPLE 1,253 1,329 1,576 1,722 1,851 1,831 1,377 912 756 1,677 570 14,854 ASH 1,679 2,131 2,219 1,976 1,733 1,240 963 651 364 512 52 13,520 BIRCH 96 260 210 199 160 196 104 70 43 63 18 1,419 Tops and limbs 10,794 7,223 6,280 5,408 3,772 2,678 1,737 433 936 403 35 39,699 838 868 921 963 780 893 723 466 283 363 20 7,118 553 597 714 786 848 843 636 424 352 783 269 6,805 688 1,035 1,171 1,111 1,028 768 619 434 250 371 40 7,515 20 72 70 77 70 94 54 40 26 43 13 579 Boles 2,627 1,413 1,463 1,449 1,234 756 554 213 377 239 27 10,352 450 259 348 346 325 404 305 340 234 509 90 3,610 913 393 380 354 419 279 265 195 166 506 203 4,073 1,604 834 719 572 458 301 160 171 128 205 30 5,182 69 53 21 23 32 86 34 33 14 35 17 417 Cull Tops and limbs 2,067 1,104 1,140 1,127 958 587 428 165 293 185 21 8,075 356 204 274 272 256 318 239 267 183 400 70 2,839 242 160 188 203 271 200 207 166 151 521 235 2,544 1,272 660 569 452 364 239 126 135 101 162 24 4,104 50 39 16 17 23 63 26 24 10 26 12 306 19.0"- 20.9" 17.0" - 18.9" 21.0"- 28.9" 29.0"- over Toi:al 1.0" 5.0" 7.0" 9.0"11.0"13.0"15.D" 17.0"19.0"21.0" 29.0" Total 1.0" 5.0" 7.0" 9.0"11.0"13.0"15.0"17.0"19.0" 21.0"29.0" TotaI " 1.0" - 4.9" 5.0" - 6.9" 7.0" - 8.9" 9.0"- 10.9" 11.0"- 12.9" 13.0"- 14.9" 15.0"- 16.9" 17.0" - 18.9" 19.0" - 20.9" 21.0"- 28.9" 29.0" -over Total 1.0" 5.0" 7.0" 9.0"11.0°'13.O" 15.0"17.0" 19.0" 21.0" 29 0" Total 4.9" 6.9" 8.9" 10.9" 12.9" 14.9" 16.9" 18.9" 20.9" 28.9" over " (Table 3 continued on next page) (Table 3 continued) ASPEN-COTTONWOOD Biomass component Growing-stock Species 9roup 1.0" - 4.9" 5.0" - 6.9" 7.0" - 8.9" 9.0"- 10.9" 11.0°'- 12.9" 13.0" - 14.9" 15.0" - 16.9" _I._" - _._" 1_n" _ 14.9" 17.0"- 18.9" 19.0" - 20.9" 21.0"- 28.9" 29.0"- over TotaI 1.0" 5.0" 7.0" 9.0"11.0"13.0"15.0"17.0" 19.0"21.0"29.0" TotaI • 1.0" 5.0°'7.0" 9.0"11.0"13.0"15.0"17.0" 19.0"21.0" 29.0"Total 1.0" 5.0" 7.0" 9.0"11.0"13.0"15.0"17.0"19.0"21.0"29.0"TotaI • 1.0" 5.0" 7.0" 9.0"11.0"13.0"15.0"17.0"19.0"21.0"29.0"Total 4.9" 6.9" 8.9" 10.9" 12.9" 14.9" 16.9" 18.9" 20.9" 28.9" over 4.9" 6.9" 8.9" 10.9" 12.9" 14.9" 16.9" 18.9" 20.9" 28.9" over 1,275 962 1,070 1,143 1,311 1,451 948 876 576 828 100 10,540 36,486 23,008 22,078 19,763 16,061 14,036 11,513 7,850 5,451 9,794 2.,370 168,410 149,415 119,169 128,902 134,898 121,022 108,611 81,972 56,626 38,476 64,069 12,753 1,015,913 I.,.049,138 4.9" 6.9" 8.9" 10.9" 12.9" 14.9" 16.9" 18.9" 20.9" 28.9" over • AlI components 581 544 674 845 I,005 963 963 !_222 963 1,_ 1,344 4,053 1,163 13,357 394 381 613 620 662 767 971 1,227 740 2,111 726 9,212 Boles 114 "225 317 458 568 587 611 759 58) /_3# 819 2,516 699 7,673 BEECH 268 234 382 361 381 497 531 573 347 567 95 4 ;236 YELLOW-POPLAR 748 598 729 772 849 971 614 543 376 480 33 6,713 OTHER HARDWOODS Tops and limbs 80 141 187 257 306 306 308 375 _ 308 396 1,167 312 3,835 84 85 147 146 161 217 238 263 164 278 49 1,832 239 220 284 317 361 428 278 252 179 237 17 2,812 Boles 220 101 96 74 74 40 25 50 _ 25 73 210 86 1 _049 24 36 49 66 70 31 118 228 133 737 339 1,831 188 95 38 36 68 35 38 55 14 75 34 676 13,364 5,277 3,794 2,863 2,357 1,925 1,595 1,147 947 1,684 341 35_294 27,963 15,411 15,040 16,286 15,697 13,726 11,567 8,956 7,063 13,604 3,023 148_336 149,91.8 Cull Tops and limbs 167 77 74 56 57 30 19 38 56 19 160 66 800 18 26 35 47 50 22 84 163 96 529 243 1,313 100 49 19 18 33 17 18 26 7 36 16 339 10,604 4,180 3,004 2,265 1,864 1,523 1,260 907 748 1,329 269 27,953 21,415 11,848 11,584 12,548 12,087 10,599 8,935 6,919 5,479 10,596 2_388 114_398 115_936 8,968 3,550 9,563 3,988 10,701 4,579 10,186 4,449 8,199 3,641 7,301 3,287 5,948 2,710 3,969 1,827 2,564 1,192 4,604 2,177 1,188 572 73,191 31,972 TOTAL HARDWOODS 72,322 65,102 71,653 73,597 64,175 57,648 41,753 27,515 17,434 26,643 4,897 522,739 541,940 27,715 26,808 30,625 32,467 29,063 26,638 19,717 13,236 8,500 13,226 2,445 230,440 241,344 4.9" 6.9" 8.9" 10.9" 12.9" 14.9" 16.9" 18.9" 20.9" 28.9" over All species 12 (Table 3 continued) ° ASPEN-COTTONWOOD Biomass component Growing-stock Tops Bo)es and limbs Boles 114 80 220 225 141 101 317 187 96 458 257 74 568 306 74 587 306 40 611 308 25 759 375 50 819 396 73 2,516 1,167 210 699 312 86 7,673 BEECH 268 234 382 361 381 497 531 573 347 567 95 4 _236 YELLOW-POPLAR 748 598 729 772 849 971 614 543 376 480 33 6,713 OTHER HARDWOODS 8,968 9,563 10,701 10,186 8,199 7,301 5,948 3,969 2,564 4,604 1,188 3,835 84 85 147 146 161 217 238 263 164 278 49 1,832 239 220 284 317 361 428 278 252 179 237 17 2,812 3,550 3,988 4,579 4,449 3,641 3,287 2,710 1,827 1,192 2,177 572 1,049 24 36 49 66 70 31 118 228 133 737 339 1,831 188 95 38 36 68 35 38 55 14 75 34 676 13,364 5,277 3,794 2,863 2,357 1,925 1,595 1,147 947 1,684 341 35,294 27,963 15,411 15,040 16,286 15,697 13,726 11,567 8,956 7,063 13,604 3,023 148,336 149,918 Cull Tops and limbs 167 77 74 56 57 30 19 38 56 160 66 800 18 26 35 47 50 22 84 163 96 529 243 1,313 100 49 19 18 33 17 18 26 7 36 16 339 10,604 4,180 3,004 2,265 1,864 1,523 1,260 907 748 1,329 269 27,953 21,415 11,848 11,584 12,548 12,087 10,599 8,935 6,919 5,479 10,596 2,388 114_398 115_936 Species 9roup 1.0" - 4.9" 5.0" - 6.9" 7.0" - 8.9" 9.0°'- 10.9" 11.O" - 12.9" 13.0"- 14.9" 15.0" - 16.9" 17.0"- 18.9" 19.0" - 20.9" 21.0"- 28.9" 29.0"- over Total • 1.0" 5.0" 7.0" 9.0"11.O" 13.0"15.0"17.0"19.0"21.0"29.0" TotaI 1.0" 5.0" 7.0" 9.0"11.0"13.0"15.0"17.0" 19.0"21.0" 29.0"Total 1.0" 5.0" 7.0" 9.0"11.0"13.0"15.0"17.0"19.0"21.0"29.0"Total 1.0" 5.0" 7.0" 9.0"11.0"13.0"15.0"17.0"19.0"21.0"29.0" Total 4.9" 6.9" 8.9" 10.9" 12.9" 14.9" 16.9" 18.9" 20.9" 28.9" over 4.9" 6.9" 8.9" 10.9" 12.9" 14.9" 16.9" 18.9" 20.9" 28.9" over 4.9" 6.9" 8.9" 10.9" 12.9" 14.9" 16.9" 18.9" 20.9" 28.9" over 4.9" 6.9" 8.9" 10.9" 12.9" 14.9" 16.9" 18.9" 20.9" 28.9" over AlI components 581 544 674 845 1,005 963 963 1,222 1,344 4,053 1,163 13,357 394 381 613 620 662 767 971 1,227 740 2,111 726 9,212 1,275 962 1,070 1,143 1,311 1,451 948 876 576 828 100 10,540 36,486 23,008 22,078 19,763 16,061 14,036 11,513 7,850 5,451 9,794 .. 2,370 168.,410 149,415 119,169 128,902 134,898 121,022 108,611 81,972 56,626 38,476 64,069 1.2,.753 1,015,913 1,049,138 • 73,191 31,972 TOTAL HARDWOODS 72,322 65,102 71,653 73,597 64,175 57,648 41,753 27,515 17,434 26,643 4,897 522,739 541_940 27,715 26,808 30,625 32,467 29,063 26,638 19,717 13,236 8,500 13,226 2,445 230,440 241_344 All species Table 4.--Total green weight of aboveground tree biomass on commercial forest land by species group, diameter class, and biomass component, Lake States (In thousand green tons) JACK PINE Biomass component AlI components 24,570 26,286 25,683 15,625 7,611 3,083 1,043 302 , 55 34 .......... 104,292 4r9" 6.9" 8.9" 10.9" 12 9" 14.9" 16.9" 18.9" 20.9" 28.9" over 13,444 11,531 8,544 6,285 5,924 6,109 5,365 4,326 2,307 2,311 15 66,161 4.9" 6.9" 8.9" 10.9" 12.9" 14.9" 16.9" 18.9" 20.9" 28.9" over 1,851 2,002 2,829 4,033 5,422 5,652 5,733 5,428 4,126 7,803 1,201 46,080 4.9" 6.9" 8.9" 10.9" 12.9" 14.9" 16.9" 18.9" 20.9" 28.9" over Growing-stock Tops Boles and limbs 17,016 5,711 17,781 7,076 17,010 7,218 9,931 4,394 4,864 2,211 1,894 881 614 292 152 75 21 11 23 11 69,306 RED PINE 7,604 6,914 5,319 3,950 3,793 3,963 3,542 2,877 1,538 1,574 9 41,083 WHITE PINE 1,260 1,350 1,852 2,661 3,518 3,711 3,699 3,488 2,643 4,738 730 29,650 WHITE SPRUCE 2,347 2,119 2,733 2,305 1,844 1,401 953 454 274 241 27,880 5,280 4,225 2,978 2,049 1,917 1,962 1,718 1,366 716 704 4 22,919 425 501 727 1,090 1,496 1,625 1,663 1,605 1,244 2,334 378 13,088 1,206 1,120 1,404 1,159 912 689 463 220 132 116 7,421 7,262 4,632 2,986 1,154 345 141 85 39 7 1 Cull Boles 983 698 728 661 282 159 77 47 13 .... 3,648 271 190 123 144 102 88 48 40 26 16 1 1,049 108 92 146 165 238 182 213 192 136 415 52 1,939 100 48 62 79 59 38 21 13 5 5 430 1,596 289 179 103 35 17 7 2 .... .... 1 Tops and limbs 860 731 727 639 254 149 60 28 10 Species 1.0" 5.0" 7.0" 9.0"11.0"i3.0" 15.0"17.0"19.0" 21.0" 29.0" Tota I 1.0" 5.0" 7.0" 9.0"11 0" 13.0" 15.0"17.0"19.0"21.0"29.0" Total 1.0" 5.0" 7.0" 9.0 11.0"13.0"15.0"17.0"19.0"21.0"29.0" TotaI 1.0" 5.0" 7.0" 9.0"11.0"13.0"15.0"17.0"19.0" 21.0"29.0" TotaI 1.0" 5.0" 7.0" 9.0"11.0"13.0"15.0" 17.0" 19.0" 21.0" 29.0" TotaI ., group 4.9" 6.9" 8.9" 10.9" 12.9" 14.9" 16.9" 18.9" 20.9" 28.9" over 3,458 289 202 124 142 112 96 57 43 27 17 1 1,110 58 59 104 117 170 134 158 143 103 316 41 1,403 65 50 73 104 76 55 29 17 7 8 484 741 212 146 88 32 15 8 4 I 3,718 3,337 4,272 3,647 2,891 2,183 1,466 704 418 370 .......... 23,006 14,671 BLACK SPRUCE 13,969 8,176 5,325 2,059 620 249 149 68 12 1 .... 30,628 t 4.9" 6.9" 8.9" 10.97 12.9" 14.9" 16.9" 18.9" 20.9" 28.9" over 23,568 13,309 8,636 3,404 1,032 422 249 113 19 2 3 50,757 2 16,652 2,229 1,248 (Table 4 continued on next page) 13 (Table 3 continued) ASPEN-COTTONWOOD Biomass component AlI components 581 544 674 845 1,005 963 963 1,222 1,344 4,053 1,163 13,357 • 1.0" 5.0" 7.0" 9.0"11.0"13.0"15.0"17.0°'19.0"21.0"29.0°'TotaI I.O" 5.0°'7.0" 9.0"11.0"13.0"15.0"17.0" 19.0"21.0" 29.0"Total 1.0" 5.0" 7.0" 9.0"11.0"13.0"15.0"17.0"19.0"21.0" 29.0"TotaI 1.0" 5.0" 7.0" 9.0"11.0" 13.0" 15.0"17.0"19.0"21.0"29.0"Total 4.9" 6.9" 8.9" 10.9" 12.9" 14.9" 16.9" 18.9" 20.9" 28.9" over 4.9" 6.9" 8.9" 10.9" 12.9" 14.9" 16.9" 18.9" 20.9" 28.9" over 4.9" 6.9" 8.9" 10.9" 12.9" 14.9" 16.9" 18.9" 20.9" 28.9" over 394 381 613 620 662 767 971 1,227 740 2,111 726 9,212 1,275 962 1,070 1,143 1,311 1,451 948 876 576 828 100 10,540 36,486 23,008 22,078 19,763 16,061 14,036 11,513 7,850 5,451 9,794 .. 2,370 168,410 149,415 119,169 128,902 134,898 121,022 108,611 81,972 56,626 38,476 64,069 12,.753 1,015,913 1,049,138 Growing-stock Tops Boles and limbs "114 80 225 141 317 187 458 257 568 306 587 306 611 308 759 375 819 396 2,516 1,167 699 312 7,673 BEECH 268 234 382 361 381 497 531 573 347 567 95 4,236 YELLOW-POPLAR 748 598 729 772 849 971 614 543 376 480 33 6,713 OTHER HARDWOODS 8,968 9,563 10,701 10,186 8,199 7,301 5,948 3,969 2,564 4,604 1,188 73,191 TOTAL HARDWOODS 72,322 65,102 71,653 73,597 64,175 57,648 41,753 27,515 17,434 26,643 4,897 522,739 541_940 3,835 84 85 147 146 161 217 238 263 164 278 49 1,832 239 220 284 317 361 428 278 252 179 237 17 2,812 3,550 3,988 4,579 4,449 3,641 3,287 2,710 1,827 1,192 2,177 572 31,972 27,715 26,808 30,625 32,467 29,063 26,638 19,717 13,236 8,500 13,226 2,445 230,440 241,344 CuIl Boles 220 101 96 74 74 40 25 50 73 210 86 1,049 24 36 49 66 70 31 118 228 133 737 339 1,831 188 95 38 36 68 35 38 55 14 75 34 676 13,364 5,277 3,794 2,863 2,357 1,925 1,595 1,147 947 1,684 341 35,294 27,963 15,411 15,040 16,286 15,697 13,726 11,567 8,956 7,063 13,604 3,023 148_336 149_918 Tops and limbs 167 77 74 56 57 30 19 38 56 160 66 800 18 26 35 47 50 22 84 163 96 529 243 1,313 100 49 19 18 33 17 18 26 7 36 16 339 10,604 4,180 3,004 2,265 1,864 1,523 1,260 907 748 1,329 269 27,953 21,415 11,848 11,584 12,548 12,087 10,599 8,935 6,919 5,479 10,596 2,388 114,398 115_936 Species 9roup !.0" - 4.9" 5.0" - 6.9" 7.0" - 8.9" 9.0°'- 10.9" 11.0°'- 12.9" 13.0"- 14.9" 15.0" - 16.9" 17.0"- 18.9" 19.0" - 20.9" 21.0"- 28.9" 29.0"- over TotaI • 4.9" 6.9" 8.9" 10.9" 12.9" 14.9" 16.9" 18.9" 20.9" 28.9" over All species 12 (Table 4 continued) BALSAM FIR Biomass component Growing-stock Tops _ Boles and limbs Boles 28,353 12,367 1,418 24,302 11,0.56 533 19,945 9,171 382 10,936 5,097 355 4,506 2,139 162 1,462 701 64 500 243 28 153 73 28 32 16 2 7 3 .... 90,196 HEMLOCK 934 1,214 2,456 4,189 5,013 5,212 4,643 3,256 2,449 4,261 256 33,883 TAMARACK 5,040 5,019 3,973 1,924 969 376 149 72 12 2 40,866 535 647 1,264 2,096 2,452 2,499 2,190 1,512 1,122 1,909 112 16,338 2,928 2,972 2,219 1,020 498 191 75 35 6 1 2,972 24 43 110 282 300 271 243 172 112 239 14 1,810 566 334 231 135 76 39 11 11 2 .... 1,405 860 563 739 892 607 339 197 98 55 64 2 4,416 61 14 14 9 9 6 4 2 4 2 Cull Tops and limbs 661 313 290 332 164 67 31 36 3 Species group 1.0" - 4.9" 5.0" - 6.9" 7.0" - 8.9" 9.0"- 10.9" 11.0"- 12.9" 13.0"- 14.9" 15.0"- 16.9" 17.0"- 18.9" 19.0" - 20.9" 21.0" - 28.9" 29.0" - over TotaI 1.0" 5_0" 7.0" 9.0"11.0"13.0"15.0"17.0" 19.0"21.0"29.0"TotaI • 1.0" 5.0" 7.0" 9.0"11.0"13.0" 15.0"17.0" 19.0" 21.0" 29.0 °'T otaI 1.0" 5.0" 7.0" 9.0"11.0"13.0"15.0"17.0"19.0°'21.0"29.0" TotaI 1.0" 5.0" 7.0" 9.0" 11.0°'13.0" 15.0" 17.(}"19.0" 21.0" 29.0" Total 4.9" 6.9" 8.9" 10.9" 12.9" 14.9" 16.9" 18.9" 20.9" 28.9" over 4.9" 6.9" 8.9" 10.9" 12.9" 14.9" 16.9" 18.9" 20.9" 28.9" over 4.9" 6.9" 8.9" 10.9" 12.9" 14.9" 16.9" 18.9" 20.9" 28.9" over 4.9" 6.9" 8.9" 10.9" 12.9" 14.9" 16.9" 18.9" 20.9" 28.9" over • All components 42,799 36,204 29,788 16,720 6,971 2,294 802 290 53 10 .......... 135,931 1,519 1,950 3,948 6,871 8,089 8,274 7,338 5,125 3,803 6,667 397 53,981 8,808 8,572 6,606 3,203 1,617 648 246 127 22 3 .......... 29,852 16,380 14,453 16,206 13,480 8,197 5,024 2,811 1,564 893 1,252 42 80,302 1,897 26 46 118 304 324 292 262 185 120 258 15 1,950 274 247 183 124 74 42 11 9 2 17,536 9,945 NORTHERN WHITE-CEDAR 10,370 8,931 9,755 7,681 4,545 2,797 1,541 859 488 686 22 47,675 OTHER SOFTWOODS 214 96 100 48 69 3 2 .... .... .... 532 4,636 4,425 5,005 4,051 2,461 1,551 877 501 290 428 15 24,240 127 50 48 22 28 2 1 966 514 534 707 856 584 337 196 106 60 74 3 3,971 32 13 12 5 8 4 2 1 2 1 434 173 174 84 114 15 9 3 6 3 .......... 1,015 278 125 80 (Table 4 continued on next page) 14 " (Table 4 continued) TOTAL SOFTWOODS Biomass component Growinq-stock Tops Boles and limbs Boles 87,107 40,477 5,987 75,902 36,704 2,804 68,468 33,020 2,714 45,684 22,132 2,825 29,741 14,459 1,870 21,068 10,242 1,203 15,792 7,607 849 11,379 5,426 605 7,469 3,544 355 11,533 5,507 741 1,017 509 70 375p160 WHITE OAK 7,225 7,126 8,272 7,859 7,524 6,750 4,984 3,125 1,974 2,731 431 58,001 RED OAK 10,668 14,305 19,975 21,336 17,926 16,681 12,486 8,047 6,172 8,525 740 136,861 HICKORY 2,347 1,956 1,892 2,158 1,119 895 464 126 166 99 11,222 HARD MAPLE 24,333 22,837 19,315 17,359 14,273 14,162 11,688 9,078 5,016 6,542 391 144,994 179,627 2,561 2,765 3,365 3,344 3,326 3,082 2,352 1,521 990 1,421 232 24,959 4,015 5,849 8,533 9,416 8,152 7,779 5,961 3,931 3,058 4,357 394 61,445 988 879 878 1,028 541 441 232 64 85 52 5_188 11,159 10,541 8,880 7,964 6,546 6,489 5,356 4,158 2,295 2,994 178 20,023 1,007 817 1,119 1,281 1,637 1,705 1,435 1,121 905 1,764 370 13,161 1,640 2,134 2,695 3,025 3,272 3,166 2,560 2,037 1,860 3,425 451 26,265 108 81 101 198 123 140 102 21 57 53 984 3,982 2,516 2,167 2,104 2,358 2,331 1,947 1,585 1,634 1,981 165 Cul 1 Tops and limbs 3,520 2,407 2,484 2,711 1,798 1,191 814 572 334 674 62 16,567 632 618 835 952 1,204 1,268 1,064 840 682 1,321 290 9,706 1,197 1,649 2,070 2,316 2,499 2,432 1,976 1,574 1,453 2,683 369 20,218 76 64 79 154 95 108 80 17 44 41 758 2,897 2,000 1,691 1,621 1,815 1,795 1,510 1,222 1,280 1,558 130 Species 9roup 1.0" 4.9" 5.0" - 6.9" 7.0" - 8.9" 9.0"- 10.9" 11.0"- 12.9" 13.0"- 14.9" 15.0"- 16.9" 17.0"- 18.9" 19.0"- 20.9" 21.0"- 28.9" 29.0"- over TotaI 1.0" 5.0" 7.0" 9.0"11.0"13.0"15.0"17.0"19.0" 21.0"29,0" Total 1.0" 5.0" 7.0" 9.0"11.0"13.0"15.0"17.0"19.0"21.0"29.0" TotaI 1.0" 5.0" 7.0" 9.0"11.0"13.0"15.0" 17.0" 19.0" 21.0" 29.0" Total 1.0" 5.0" 7.0" 9.0"11.0"13.0"15.0"17.0"19.0"21.0"29.0" Total 4.9" 6.9" 8.9" 10.9" 12.9" 14.9" 16.9" 18.9" 20.9" 28.9" over 4.9" 6.9" 8.9" 10.9" 12.9" 14.9" 16.9" 18.9" 20.9" 28.9" over 4.9" 6.9" 8.9" 10.9" 12.9" 14.9" 16.9" 18.9" 20.9" 28.9" over A11 components 137,091 117,817 106,686 73,352 47,868 33,704 25,062 17,982 11,702 18,455 1,658 591,377 11,425 11,326 13,591 13,436 13,.691 12,805 9,835 6,607 4,551 7,237 1,323 105,827 17,520 23,937 33,273 36,093 31,849 30,058 22,983 15,589 12,543 18,990 1,954 244_789 3,519 2,980 2,950 3,538 1,878 1,584 878 228 352 245 .......... 18,152 42,371 37,894 32,053 29,048 24,992 24,777 20,501 16,043 10,225 13,075 864 251_843 i 4.9" 6.9" 8.9" 10.9" 12.9" 14.9" 16.9" 18.9" 20.9" 28.9" over ,* 66,560 22,770 17,519 (Table 4 continued on next page) 15 (Table _ 4 continued) .............................. SOFT MAPLE ; Bi omass component Growinq-stock Boles 20=424 16,824 14,092 11,378 7,905 6,737 3,706 2,473 1,488 2,066 407 87_50:0 .i . ASH 10,918 9,702 10,106 7,658 5,050 3,174 1,934 782 384 566 33 50,307 BIRCH 38,483 37,322 32,549 21,696 11,586 5,339 3,440 1,942 1,169 1,455 202 Tops and limbs 9,074 7,718 6,449 5,210 3,633 3,108 1,718 1,149 694 969 194 39,916 4,707 4,860 5,256 4,114 2,827 1,858 1,161 498 243 401 23 25,948 9,597 12,435 12,411 8,979 5,15) 2,549 1,765 1,075 693 974 154 Boles 4,585 2,223 1,961 1,492 1,224 1,045 720 534 477 640 228 15,129 2,204 1,138 971 817 706 464 301 135 95 180 17 7,028 3,728 3,171 3,132 2,306 1,993 1,327 817 569 695 1,040 157 18,935 8,767 5,846 7,066 6,718 5,613 3,697 2,005 1,140 621 431 23 41,927 44 60 66 90 239 273 350 330 418 523 5 Cul 1 Tops and limbs 1,375 1,057 1,059 887 809 757 558 444 427 637 231 8,241 1,454 900 761 626 527 358 231 110 79 150 19 5_215 2,327 2,234 2,083 1,518 1,369 955 596 427 522 779 114 12,924 5,387 4,550 5,218 4,884 4,108 2,794 1,555 947 525 365 20 30,353 32 43 47 65 172 196 251 237 300 375 4 • Specie 1.0" 5.0" 7.0" 9.0" 11.0"i3.0"15.0"17.0"19.O" 21.0"29.0"Total 1.0" 5.0" 7.0" 9.0"11.0" 13.0"15.0"17.0"19.0" 21.0" 29.0°'Total 1.0" 5.0" 7.0" 9.0"11.0"130"15.0"17.0"19.0"21.0"29.0"TotaI 1.0" 5.0" 7.0" 9.0"11.0"13.0"15.0"17.0"19.0"21.0"29.0"Total 1.0" 5.0" 7.0" 9.0"11.0"13.0"15.0"17.0"19.0"21.0"29.0" Total s Qroup 4.9" 6.9" 8.9" 10.9" 12.9" 14.9" 16.9" 18.9" 20.9" 28.9" ove'r A11 components 35,458 27,822 23,561 18,967 13,571 11,647 6,702 4,600 3,086 4,312 1,060 150,786 • 4.9" 6.9" 8.9" 10.9" 12.9" 14.9" 16.9" 18.9" 20.9" 28.9" over 19,283 16,600 17,094 13,215 9,110 5,854 3,627 1,525 801 1,297 92 88,498 4.9" 6.9" 8.9" 10.9" 12.9" 14.9" 16.9" 18.9" 20.9" 28.9" over 54,135 55,162 50,175 34,499 20,101 10,170 6,618 4,013 3,079 4,248 627 242,827 155,183 55,785 ASPEN-COTTONWOOD 24,473 29,400 40,980 39,044 29,917 17,235 7,589 2,682 1,396 1,320 149 194,185 BEECH 2,463 1,971 1,838 2,113 2,353 2,151 2,367 1,725 828 1,055 9 18,873 13,176 16,775 21,846 20,038 15,172 8,673 3,804 1,503 664 499 66 102,216 777 711 707 854 991 937 1,062 794 390 519 5 • 4.9" 6.9" 8.9" 10.9" 12.9" 14.9" 16.9" 18.9" 20.9" 28.9" over 51,803 56,571 75,110 70,684 54,810 32,399 14,953 6,272 3,206 2,615 258 368,681 4.9" 6.9" 8.9" 10.9" 12.9" 14.9" 16.9" 18.9" 20.9" 28.9" over 3,316 2,785 2,658 3,122 3,755 3,557 4,030 3,086 1,936 2,472 23 30,740 7,747 2,398 1,722 (Table 4 continued on next page) 16 o (Table 4 continued) YELLOW-POPLAR Biomass component Growi nq-stock Cul 1 Tops and limbs 4 2 1 1 1 1 4 1 11 26 5,602 2,250 2,371 1,846 1,886 1,738 1,234 923 815 1,628 482 20,775 20,983 15,367 16,215 14,870 14,485 12,402 9,059 6,742 6,127 9,548 1,659 127_457 144,024 " _ Species ,group 1.0" - 4.9" 5.0" - 6.9" 7.0" - 8.9" 9.0" - 10.9" 11.0" - 12.9" 13.0"- 14.9" 15.0" - 16.9" 17,0"- 18.9" 19.0"- 20.9" 21.0" _ 28.9" 29.0" - over Total 1.0" 5.0" 7.0" 9.O" 11.0"13.0"15.0"17.0"19.0"21.0"29.0"TotaI • 1.0" 5.0" 7.0" 9.0"11.0"13.0"15.0"17.0"19.0"21.0"29.0"Total All species 4.9" 6.9" 8.9" 10.9" 12.9" 14.9" 16.9" 18.9" 20.9" 28.9" over 4.9" 6.9" 8.9" 10.9" 12.9" 14.9" 16.9" 18.9" 20.9" 28.9" over A11 components 53 42 29 30 30 25 76 24 -......... 126 .......... , 435 Boles 32 26 19 19 18 15 44 14 61 Tops and limbs 10 10 7 8 8 7 20 6 30 106 6,641 7,636 15,882 14,451 8,016 7,111 5,014 3,433 2,183 3,752 812 74,931 62,705 70,179 84,214 75,406 54,365 42,034 28,445 18,132 11,295 15,968 2,058 464,801 644,428 Boles 7 4 2 2 3 2 8 3 24 55 8,355 2,813 2,982 2,344 2,359 2,182 1,519 1,151 1,023 2,053 640 27,421 34,427 20,803 22,262 20,377 19,527 16,332 11,764 8,626 7,785 12,114 2,056 176,073 196,096 248 OTHER HARDWOODS 16,234 17,497 36,394 32,641 17,791 15,642 10,901 7,382 4,642 7,835 1,605 168,564 TOTAL HARDWOODS 157,600 158,966 185,432 163,261 115,462 88,781 59,603 37,376 23,235 32,255 3,967 1,025,938 1,4.01,098 " 36,832 30,196 57,629 51,282 30,052 26,673 18,668 12,889 8,663 15,268 3,539 291,691 275,715 265,315 308,123 273,914 203,839 159,549 108,871 70,876 48,442 69,885 9,740 1,794,269 2,385,646 Table 5.--Total green weiqht of aboveground tree biomass on commercial forest land by species group, diameter, class and biomass component, Prairie States (In thousand green tons) JACK PINE Biomass component Growing-stock Tops Boles and limbs Boles 3 1 .... 27 10 .... 40 17 1 12 5 .... Cull Tops and limbs L_Species group 1.0" - 4.9" 5.0" - 6.9" 7.0" - 8.9" 9.0" - 10.9" 11.0" - 12.9" 13.0"- 14.9" 15.0"- 16.9" 17.0"- 18.9" 19.0".- 20.9" 21.0" - 28.9" 29.0" - over Total 1.0" 5.0" 7.0" 9.0"11.0"13.0"15.0"17.0" 19.0"21.0" 29.0" TotaI 1.0" 5.0" 7.0" 9.0" 11.0" 13.0" 15.0"17.0"19.0"21.0"29.0" Total 1.0" 5.0" 7.0" 9.0"11.0"13.0"15.0" 17.0" 19.0"21.0" 29.0" Total 1.0" 5.0" 7.0" 9.0" 11.0"13.0"15.0"17.0"19.0"21.0"29.0"Total 4.9" 6.9" 8.9" 10.9" 12.9" 14.9" 16.9" 18.9" 20.9" 28.9" over 4.9" 6.9" 8.9" 10.9" 12.9" 14.9" 16.9" 18.9" 20.9" 28.9" over 4.9" 6.9" 8.9" 10.9;' 12.9" 14.9" 16.9" 18.9" 20.9" 28.9" over All components 4 37 59 17 .......... -......... -......... -......... -......... -......... .......... 117 82 PONDEROSA PINE 893 390 1,285 760 1,900 1,142 2,178 1,353 2,032 1,279 1,778 1,038 924 570 468 265 245 167 72 50 .......... 11,775 36 164 85 59 48 16 9 1 2 8 7 435 933 1,486 2,044 2,254 2,080 1,794 933 469 247 80 7 12,327 1,414 1,598 2,105 2,141 1,949 1,672 1,169 1,079 907 1,753 405 16,192 1 33 275 471 662 744 673 526 279 126 78 22 3,856 11 53 22 16 11 3 2 I 107 25 46 38 37 99 35 36 .... .... 423 5 6 9 3 4 3 I I I 4 4 41 112 31 56 41 41 102 36 37 1 4 4 465 I 121 29 50 43 43 115 40 41 7,014 OTHER SOFTWOODS 16 100 47 38 29 8 5 .... .... .... .... 243 TOTAL SOFTWOODS 409 887 1,229 1,403 1,308 1,046 575 265 167 50 .... 7,339 WHITE OAK 552 666 889 883 849 682 479 439 364 437 58 6,298 482 4 5 7 2 4 2 1 -1 4 3 33 125 34 58 45 47 117 41 41 1 4 3 516 118 287 534 701 765 684 529 281 126 78 22 4,007 • 4.9" 6.9" 8.9" 10.9" 12.9" 14.9" 16.9" 18.9" 20.9" 28.9" over I_ 18 218 385 259 255 397 280 367 494 355 383 511 364 372 423 305 309 391 290 223 268 199 208 247 185 176 209 158 221 621 474 31 179 137 2,763 4,1.25 3,006 (Table 5 continued on next page) (Table 5 continued) RED OAK Biomass component All components 319 445 523 615 620 556 480 501 403 588 77 5,127 • 1.0" - 4.9" 5.0" - 6.9" 7.0" - 8.9" 9.0" - 10.9" 11;0"- 12.9" 13.0"- 14.9" 15.0" - 16.9" 17.O" - 18.9" 19.0" - 20.9" 21.0°'- 28.9" 29.0"- over Total 1.0" 5.0" 7.0" 9.0"11.0" 13.0"15.0" 17.0"19.0" 21.0"29.0" Total 1.0" 5.0" 7.0" 9.0"11.0"13.0"15.0"17.0"19.0"21.0"29.0"TotaI 1.0" - 4.9" 5.0" - 6.9" 7.0" - 8.9" 9.0"- 10.9" 11.0" - 12.9" 13.0"15.0"19.0"21.0"17.0" 29.0" Total 14.9" 16.9" 20.9" 28.9" 18.9" over 4.9" 6.9" 8.9" 10.9" 12.9" 14.9" 16.9" 18.9'_ 20.9" 28.9" over 297 483. 484 362" 284 194 205 122 155 234 41 2,861 20 41 47 39 25 40 26 3 3 15 3 262 94 74 109 147 119 118 76 150 76 162 24 1,149 1,242 1,384 1,429 1,650 1,489 1,592 1,176 455 582 705 114 11,818 Growing-stock Tops Boles and limbs 126 47 208 84 255 108 334 325 276 231 222 195 201 .... 2,373 HICKORY 175 295 282 187 142 91 103 50 54 54 .... 1,433 HARD MAPLE 8 20 27 17 13 24 15 .... .... 3 .... 127 SOFT MAPLE 14 8 29 51 46 47 27 69 33 47 .... 371 ASH 424 548 518 595 599 579 441 172 123 260 14 4,273 151 150 131 111 97 96 101 1,076 74 133 131 90 69 45 52 26 28 29 677 3 9 12 8 6 11 7 Cull Boles 82 86 90 73 81 84 78 102 63 161 43 943 27 31 40 48 41 33 28 26 41 85 23 423 5 7 4 8 3 3 2 2 2 6 2 44 57 44 45 46 32 29 20 27 15 46 11 372 379 327 376 423 319 380 259 98 210 158 50 Tops and limbs 64 67 70 57 64 65 60 80 49 125 34 735 21 24 31 37 32 25 22 20 32 66 18 328 4 5 4 6 3 2 2 1 1 5 1 34 16 18 22 27 20 20 16 22 13 47 13 234 252 246 270 310 234 290 201 77 164 124 39 Species group 1.0" - 4.9" 5.0" - 6.9" 7.0" - 8.9" 11.0" 13.0"15.0"17.0"9.0"19.0"21.0"29.0"Total 12.9" 14.9" 16.§" 18.9" 10.9" 20.9" 28.9" over 1 57 7 4 13 23 21 22 13 32 15 22 172 187 263 265 322 337 343 275 108 85 163 11 4.9" 6.9" 8.9" 10.9" 12.9" 14.9" 16.9" 18.9" 20.9" 28.9" over , i i 2,359 2,979 2,207 (Table 5 continued on next page) 19 (Table 5 continued) BIRCH Biomass component AlI components 48 89 85 45 52 32 -......... -......... -......... -......... .......... 351 201 ASPEN-COTTONWOOD 1,800 1,821 2,455 2,590 2,424 2,265 1,828 1,857 1,978 6,419 2,230 27_667 4.9" 6.9" 8.9" 10.9" 12.9" 14.9" 16.9" 18.9" 20.9" 28.9" over 4,209 4,172 4,964 5,081 5,056 5,084 4,448 3,625 2,773 6,114 1,200 46,726 4.9" 6.9" 8.9" 10.9" 12.9" 14.9" 16.9" 18.9" 20.9" 28.9" over 9,443 10,107 12,201 12,556 12,013 11,617 9,484 8,021 6,750 15,867 4,094 112,153 124,480 738 744 1,008 1,046 968 876 770 793 987 3,242 993 12._65 1 OTHER HARDWOODS 847 1,183 1,560 1,590 1,867 1,902 1,739 1,367 1,079 1,826 185 15,145 TOTAL HARDWOODS 2,915 3,726 4,611 4,617 4,853 4,538 3,850 3,209 2,884 5,933 1,250 42,386 49,725 Growing-stock • Tops Boles and limbs 31 14 54 26 43 20 26 12 35 17 12 6 Cull Boles 2 6 15 4 .... 9 Tops and limbs 1 3 7 3 5 Species 9roup 1.0" - 4.9" 5.0" - 6.9" 7.0" - 8.9" 9.0"- 10.9" 11.0" - 12.9" 13.0" - 14.9" 15.0"- 16.9" 17.0"- 18.9" 19.0" - 20.9" 21.0" - 28.9" 29.0" - over Total 1.0" 5.0" 7.0" 9.0"11.O" 13.0"15.0"17.0"19.0"21.0"29.0" Total 1.0" 5.0" 7.0" 9.0"11.0" 13.0"15.0"17.0"19.0"21.0"29.0"TotaI 1.0" 5.0" 7.0" 9.0"11.0"13.0"15.0"17.0"19.0" 21.0"29.0" Total All species 4.9" 6.9" 8.9" 10.9" 12.9" 14.9" 16.9" 18.9" 20.9" 28.9" over 95 357 385 518 536 508 452 391 390 477 1,511 448 5,973 345 496 671 701 835 862 801 634 506 865 88 6,804 1,252 1,655 2,105 2,172 2,316 2,200 1,893 1,564 1,406 2,835 578 19,976 23,983 36 420 403 533 575 543 530 378 385 291 946 454 5,458 1,706 1,402 1,546 1,576 1,340 1,316 1,082 918 670 1,932 519 14,007 3,063 2,703 3,143 3,293 2,774 2,772 2,121 1,841 1,389 4,007 1,281 28,387 28,852 19 285 289 396 433 405 407 289 289 223 720 335 4,071 1,311 1,091 1,187 1,214 1,014 1,004 826 706 518 1,491 408 10,770 2,213 2,023 2,342 2,474 2,070 2,107 1,620 1,407 1,071 3,092 985 21,404 21,920 • I 20 i .Tahle 6.--Total green weight of aboveground tree biomass on commercial forest land by ownership class, softwoods and hardwoods, and biomass component. Central States (In _ thousand green tons) component Cul 1 Tops Biomass Growinq-stock A11 National Forest Softwood s Hardwoods Ownership class Tota I Other public So ftwood s Hardwood s Tota I Forest-Industry . So ftwood s Hardwood s •Tota I Other private Softwood s -Hardwoods Total A11 owners Softwoods Hardwoods Total • I"- 5" Tops i I I. 368 components 83.204 94.572 I. 741 40.941 42.682 I. 479 __ 18.988 20.467 18.637 872.780 891.417 33.225 1.015.913 1.049.138 755 13.408 trees 14.163 256 5.258 5.514 268 4.710 4.978 6.479 126.039 132.518 7.758 149.415 157.173 6.386 34 ' 445 Boles 40.831 919 18.980 19.899 727 6.877 7.604 7.351 390.115 397.466 15.383 450.417 465.800 3.431 and , limbs 15 344 18.775 458 8.607 9.065 392 3.056 3.448 3.857 175.718 179 575 8.138 202.725 210.863 410 II Boles 285 , I I. 695 57 4.568 4.625 47 2.450 2.497 498 102.070 102.568 1.012 120.373 121.385 386 • and , limbs 8 722 9.108 51 3.528 3.579 45 I. 895 I. 940 452 78.838 79.290 934 92.983 93.917 • Tahle 7.--Total green weight of aboveground tree biomass on commercial forest land by ownership, class, softwoods and hardwoods, and biomass component, Lake States (In thousand green tons) Biomass component Growing-stock Ownership class National Forest Softwoods Hardwoods Tota I • Other public Softwood s Hardwood s Total Forest Industry Softwood s Hardwood s Total Other private Softwoods Hardwoods Total A1 1 owners Softwoods Hardwoods Total . ' Al I components 94,914 172,943 267,857 184,824 433,618 618,442 82,997 172,963 255.960 228,642 1.014.745 1.243.387 591.377 1.794.269 2.385.646 1"-5°' trees 15,878 26,436 42,314 49,653 69,430 119,083 15,340 24,176 39.516 56,220 155.673 211.893 137.091 275.715 412.806 Boles 50,623 84,361 134,984 85,040 207,647 292,687 42,949 85,748 128.697 109,441 490.582 600.023 288.053 868.338 1.156.391 Tops and limbs 24,293 38,522 62,815 41,087 97,316 138,403 20,787 39,288 60.075 52,983 226.970 279.953 139.150 402.096 541.246 Boles 2,112 13,666 15,778 4,900 33,840 38,740 1,963 13,525 15.488 5,061 80.615 85.676 14.036 141.646 155.682 Cul l Tops and limbs 2,008 9,958 11,966 4,144 25,385 29,529 1,958 10,226 12.184 4,937 60.905 65.842 13.047 106.474 119.521 21 T i Table 8.--Total ownership green weight of aboveground tree biomass on commercial forest class, softwoods and hardwoods, and biomass component, Prairie (In - land by States thousand green tons) Ownership class National Forest So ftwood s Hardwoods Tota I Other public Softwoods Hardwoods Tota I, Forest Industry Softwoods Hardwoods Total Other private So ft wood s Hardwoods Total A11 owners Softwoods Hardwood s Tota I A11 components 2,449 164 2,613 2,128 6,244 8,372 ............ ............ ............ 7,750 105,745 113,495 12,327 112,153 124,480 I"-5" trees 65 107 172 139 509 648 Biomass component Growing-stock Tops Boles and limbs I, 465 20 I, 485 I, 185 2,338 3,523 780 9 789 660 I, I 16 1,776 Cul 1 Boles 65 19 84 68 1,286 1,354 Tops and limbs 74 9 83 76 995 1,071 72 9 8,827 9,556 933 9,443 I O, 376 4,280 37,113 41,393 6,930 39,471 46,401 2,280 17,599 19,879 3,720 18,724 22,444 220 24,019 24,239 353 25,324 25,677 241 18,187 18,428 391 19,191 19,582 _'U.S. GOVERNMENT PRINTING OFFICE: 1982-566-927/96 22 Raile, Gerhard K.; Jakes, Pamela J. Tree biomass in the North Central Region. Res. Pap. NC-220. St. Paul, MN" U.S. Department of Agriculture, Forest Service, North Central Forest Experiment Station; 1982.22 p. biomass for 11 north-central onMethods for calculatingtreeis estimated are outlined, and the commercial forest land Tree biomass in the North Central Region totals 3.6 billion 50 tons per commercial forest acre. For all species, total tree is concentrated in growing-stock boles KEY WORDS: tree weight, tops and limbs, energy. biomass States. tons, or biomass °