Golf Course Com. Irrigation Cont.
Today the most popular pipe used is PVC in several du golf. On ne doit accepter comme une situation nor-
ratings such as Schedule 40, 160 P.S.I, rating and 125 male le fait que ces ruptures se renouvellent sans cesse
P.S.I, rating. The latter is not recommended because the ou qu'elles aillent en augmentant.
demands for higher pressure for sprinkler performance
require 160 P.S.I, rating as minimal. Properly installed, Le PVC, dans les classes 40, 160 et 125, est le plus
carefully handled and backfilled when pipe is at soil communement employe presentement. On ne recom-
temperature gives P.V.C. an opportunity to function mande pas la classe 125 en raison du fait que certains
very well. Aluminum, wrapped and unwrapped, has had tourniquets demandent une pression de fonctionnement
varying degrees of success. Where soil is kind to the superieure a 160 psi. Si on Pinstalle convenablement, si
material, water is acceptable in quality and resistivity of on le manipule avec precaution, si on le recouvre avec
the soil is known the product can perform satisfactorily. soin lorsqu'il est a la temperature du sol, le PVC doit
Asbestos cement *s excellent if installed as specified by fonctionner correctement. Les tuyaux d'aluminium,
the manufacturer but cost is quite high. avec ou sans enveloppement, ont connu des succes
variables. Lorsque le sol n'attaque pas le metal, quand
Polyethelene has been left to the last as it must be used on l'eau est de qualite adequate, et pour une resistivite
a pressure rated basis. The material to withstand high donnee du terrain, ces tuyaux peuvent convenir.
pressures, 100 to 125 P.S.I, is expensive but in bad L'amiante est excellente a condition de suivre les direc-
frost conditions areas should be considered. The intro- tives d'installation, mais le prix en est eleve.
cution of heat-welded joints and its use in cold weather
are well worth considering when deciding on piping for Nous etudierons en dernier lieu le polyethylene. II est
a system. Areas that must have heavy traffic at irregular employe pour resister aux hautes pressions, dans les
intervals get better results with polyethelens as it can classes 100 a 125 psi; il est couteux, mais utile dans
take pressure and not crack or break. les regions soumises a des gels intensifs. Son adaptation
In conclusion, pipe properly installed can do a job re- aux climats froids et ses nouveaux joints soudes a chaud
gardless of its type or make. If the limitations of a ma- font que son utilisation merite d'etre etudiee avant
terial are known, accepted and can be worked with on de fixer son choix sur un type de tuyau. Les zones qui
the system you have a good chance of success. Avoid subissent une circulation intense, a intervalles irreguliers,
however, cheaper forms of a similar material, buy the s'accomodent mieux du Polyethylene qui supporte la
best in whatever material or rating you buy and since pression sans se fendre ni casser.
there is a C.S.A. rating for these materials insist that
the rating be that specified for the materials supplied. En conclusion, pourvu que l'installation soit faite
convenablement, n'importe quel type de conduite peut
convenir. Si on connait les limites de rendement d'un
materiau et si elles correspondent a ce qu'on attend, on
WATER MANAGEMENT peut l'employer avec de bonnes chances de succes. II
faut cependant eviter les produits trop bon marche et
by acheter ce qu'il y a de mieux dans le type ou dans la
Bill Knoop, Turf Specialist, Univ. of N. H. classe choisis. II existe une evaluation C.S.A., insistez
done pour qu'elle figure sure les tuyaux que vous
achetez. Tr. R.P.
Now is the time of year when our thoughts turn from
the problems of preparing a golf course for play to Water Management Cont.
thoughts of how to keep the turf in the best possible
condition for this summer's play. The spring rains are more water than the deeper rooted ones. This can
behind us and we must get the "rust out of our pipes" change. If bluegrass is watered too much it won't de-
and irrigate our turf. velop a deep root system and may require as much
irrigation as bentgrass. Under these wet conditions
In considering water management there are a number of which do not encourage deep root growth Poa annua
factors to evaluate. The variety of grass is important as can thrive. Bentgrass and bluegrass are weak under
is the soil type. The physical irrigation facility must be high moisture levels and Poa annua can easily out-
considered. When these factors are put together water compete them. Encourage the deep rooting of both
can be an effective management tool. bentgrass and bluegrass by heavy waterings at infre-
quent intervals. Irrigate till the water has penetrated at
There are several things to consider when deciding the least 6 inches into the soil. Water when the first signs
best time of day to irrigate. The best time for you may of wilt are apparent.
not be the best for anyone else. Avoid watering during
the day as much as possible. A moist warm turf is ideal Early morning watering has the advantage of washing
for desease development. A great deal of water is lost by off any dew that is on the grass leaf. This dew has been
evaporation during the hot daylight hours. accused of being a transport system for turf diseases.
Different grasses have different normal rootzone depths. The golfer, too, has some thoughts on the right time to
Poa annua is normally shallow-rooted. Bentgrass is water. Usually he wants a hard fairway for a long roll
somewhat deeper rooted and bluegrass is normally much and a wet green to hold his shot. Once he is on the
deeper rooted than the others. Because soil dries from green it need not be too wet nor too dry. It all depends
the surface down the shallow-rooted grasses require on how well he can putt.
7
Wall'r Managl'lIIenl Colli.
Irrigation if used properly can be a very useful manage-
ment tool. You can train your grasses to develop deep
root systems. You can aid in reducing or even controlling
Poa annua. You can lessen the chance of a disease in-
vasion. Yes, and if you're lucky, you can keep the golfer
happy.
News Letter of New England. N.H. GCSA, July 1,
1970.
Golf without weeds
You need You need
~COMPITOX' ~COMPITOX'PLUS
for greens and for fai rways, lawns
seedling grass. and established turf.
II •
.. •
MAY & BAKER (CANADA) LTD,
Montreal 351: 200 Bellarmin Street
Toronto 12: 69 Eglinton Avenue East
Calgary 3: 1147 17th Avenue S. W.
Following the graduation the O.D.H. Graduates As-
sociation arranged a banquet in honour of the graduating
class. Here graduates were. able to become acquainted
with one another, with course markers, with officers of
the various horticultural trade associations, with staff
from the University of Guelph and with other students.
Following the dinner, Honorary Life Memberships to
the Association were presented to Miss Louise Heringa,
Guelph, and to Prof. Ralph Goodwin-Wilson, Jupiter,
Florida. Both have recently retired from the Department
of Horticultural Science at the Ontario Agricultural
College and, both, too, were active in the original
development of the study program, and are still doing
course development and course marking.
The following is a complete list of the 1970 graduates.
ONTARIO DIPLOMA IN HORTICULTURE GRADUATION, their area of horticultural specialization bt:ling shown
MAY 27, 1970.
in brackets.
Ten of the graduate. present for the ceremonies are shown above. L to R -
"Robert Brew.ter, BranUord; John Rahm, Leamington; Ray Reddick,
William Abel, Fonthill (General Horticulture)
Toronto; Gu. Stahlmann, Streetsvllle; Franz Bernt, Hamilton; Harold
Crawford (on .taff with Horticultural Correspondence Study program); Franz R. Bernt, Hamilton (Landscape Contracting)
Erwin Schleimer, I.llngton; C.E. (Ted) McNinch (Director of Correspon- W. James Boughen, Victoria, B.c. (General Horti-
dence Study, University of Guelph); Norman McKenna, Guelph; Anthonle
Janlen, Edmonton, Alberta; Richard Trleaelmann, Sault Ste. Marie; Martin culture)
Mooy, Sl Cathanne. and Thoma. Patience, Niagara Falls. Not shown but Robert A. Brewster, Brantford (Turf Management)
present for the graduation ceremony was O. W .A. MacKenzie, Ottawa.
Lorenz Dietlein, Thunder Bay (Park Management)
Andrew Hild, Regina, Saskatchewan (General
A great deal of dedication and family co-operation is
Horticulture)
represented by the graduates from this program, since
Anthonie M. Jansen, Edmonton, Alberta (Com-
the three-year course is done entirely at home, by cor-
mercial Floriculture)
respondence.
John B. Littler, Maple_Ridge, B.C. (Nursery
"Recipient of the CGSA - ACSG Scholarship in Second Year. Operations)
8