The Coalville times. [volume] (Coalville, Utah) 1894-1923, 1912-03-22

some Of you In your work; for. after
all. each Of your individual problems
must be solved by yourselves.
The amount Of plant growth Ia DE-
pendent in a decided measure upon
the amount Of moisture, within Ger 4
tain limits in the soil The supplying
and maintaining Of this moisture In
an amount which will bring the great
est return In. then, our problem.
The water found In soils In Of three
kinds:
LIST Free water or the water
found betgeen the soil particles Of .
saturated soil.
End. Capillary water or that which
Ia held in thin iilm around each Of
tho soil particles Of moist but not
saturated soil. This is the water used
by the plant in lite growth
3rd. Ilygroscopic water which In
the water held by the soil but which.
In all probability Is not used by tho
plant
only aqueous or water plants can
grow in soil containing free water.
Hence our problem liz confined TO tho
regulation Of the capillary water only,
and to the conditions which govern
plant growth.
There arc three ways by which soil
moisture can escape:
lat By sinking into deep soils out
OF reach Of the plant roots, ana oscap.
ling by under drainage
2ud. by eyaporating from the sur.
, face
3rd. by passing through the plant
itself In process known as trans
piration.
Each OF these losses can be gov.
crncd to a certain extent. The first
by making lighter applications OF
water at each irrigation. The second.
, or surface evaporation. can be- check
4 ed by cultlyaung the surface sufi'
4 Client to form dust mulch. thus clos
ing up tho opening OF the capillary
tubes which form when the surface
!. soil begins TO dry out And tho third
a or Transportation can be checked by
o the addition OF soil fertility or by or
n binary cultivation. Thus. the last two
=, can be- governed by the simple opera
ton Of stirring the surface after an
irrigation.
The thought In prevalent among
n farmers that certain amount OF
water must be used by plant In or
n der to produce certain weight OF dry
v matter. Az early as 1909 Woodward
n found that II required less water "a
10 produce u pound Of dry matter In q
plant growing In n rich soil where the
b, plant food was evenly balanced. thar
~ In one Of opposite nature. Later. IN
Isis, n German investigator fount
10 that the yield OF dry matter wal
T. greatest where Transportation wa
N least. lie also found that the enrich
a. ing OF the soil enabled the plant u
~ produce dry matter with less water
Ir Now the question may arise In you
a, minds: Why should cultivation de
crease the amount OF water actually
" used by the plant2 Cultivation per
Units the air and sunshine TO enter IN
ny soil more readily, causing cons'
m. quent liberation OF plant food. while
is equivalent In effect TO the addito
by OF the food artlnclally.
ma. That cultivation actually decrease
ro the amount OF water used by IN
~ plant In shown In the results OF 81
perlmcnts conducted NJ the Utah 81
" pertinent station In the Vegetauo
~ house. Certain tanks were planted
l.n corn. An equal number OF tanks col
w tanning the same kinds OF soil weT
W left bare for check on the evnporI
,o ton from the surface. Forty cigi
w hours after each irrigation and the
ol ,v.rv Uopk ,hnIf tho guTfnceR WEI
100 o',.,,,g,,'S M ,ha o,bor boif we,
OF yu s, T rnhio NJ shovs ,,a =
~. suits.
'aS TABLE NO. I.
be