# LAB 9 ANALYSIS OF SOIL AND CLIMATE DATA Objectives

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```					                   LAB 9: ANALYSIS OF SOIL AND CLIMATE DATA

Objectives
1. To calculate summary statistics temperature profiles, relative humidity and soil attributes
of the broadleaf and needle-leaf forests.
2. To complete analyses of soil moisture and water holding capacity in the broadleaf and
needle-leaf forests.
3. To review protocols and formats for presenting research results in Figures and Tables
within a Scientific Report.

1. Record the weight of your oven dry soil
2. Remove all soil and wash the soil tin
3. Calculate soil water and moisture holding capacity (see next page)
4. Exchange soil data with the class

B. Parameters to be calculated from the class data.
Using the class data, make the following calculations for each forest type.

Attribute
Minimum   Maximum Average                Minimum Maximum Average
Temp.
@ 20cm
Temp.
@ 0cm
Temp.
@ -10cm
Temp.
@ -20cm

Attribute
Wet Bulb Dry Bulb     RH (%)            Wet Bulb Dry Bulb     RH (%)
Relative
humidity

Attribute
Minimum Maximum Average                 Minimum Maximum Average
% soil
moisture
WHC

Depth of
leaf litter

C. Protocols for Tables and Figures
Table formats: title above, columns and rows labelled, referenced in text
Figure formats: title below, axes labelled including units, referenced in text

GEOB207 Labs - 39
Measurements (Labs 8 and 9)

A     weight of small tin + fresh soil          _________ g
B     weight of empty, clean, dry large tin     _________ g
C     weight of empty, clean, dry small tin     _________ g
D     weight of large tin + saturated soil      _________ g
E     volume of small tin                       _________ ml

F     weight of large tin + oven dry soil       _________ g

Calculations for soil moisture:
Soil moisture (%) = (fresh weight – dry weight) / (dry weight) x 100

L     fresh weight = (A – C) = _________ g
M     dry weight    = (F – B) = _________ g

N     Soil moisture (%)     = (L – M) / (M) x 100 = _________ %

Calculations for soil water holding capacity:

G     weight of saturated soil = (D – B) = _________ g
H     weight of oven dry soil = (F – B) = _________ g
I     weight of water in saturated soil
= (G – H) = _______ g water per ______ ml of soil (E)
J     Since 1ml of water = 1g, then
= (G - H) = _______ ml water per ______ ml of soil (E)

K     Convert answer J to ml of water per 100 ml of soil

= _______ ml per ______ 100 ml of soil

GEOB207 Labs - 40

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