18 BULLETIN 10. U. S. DEPARTMENT OF AGRICULTURE. 
The following plan of irrigation was outlined and carried out 
Schedule of irrigation of grain following alfalfa hi 1912. 
OATS. 
Number of plat* 
Number of irrigations. Date. Depth. 
Staius of oats. 
3? 
Inches. 
33 
34 
. One April9....l 13.2 
Twn /April 13... 13.2 
Oats 12 inches high. 
Do. 
Oats heading out. 
WHEAT. 
32 
33 
34 
. None 
. One April25... 10.00 
T . vn i April 15... 9.15 
• iwo \May9 . S.40 
Wheat 24 inches high. 
Wheat IS inches high. 
Wheat coming into full head. 
OATS 
WHEAT 
WATER APPLIED.-INCHES 
3.2 20.4 
18.4- 
2000- 
J800- 
1400- 
a l200- 
tn 
o 
ZI000- 
o 
^800- 
3600- 
u 
> 400 - 
200- 
b ■ 
5 
<0 
7Q 
In each irrigation water was added at a time when it was thought 
that the best results would be obtained, and in no case was irriga- 
tion delayed until the crop was suffer- 
ing for moisture. It will be noticed 
that in all cases large amounts of 
water were used. This was necessary 
in order to cover the checks completely 
and was due to the open, porous con- 
dition of the soil, the result of turn- 
ing under the green manure. 
Early in June, just before harvest- 
ing, several days of heavy north wind 
occurred, badly shattering both crops. 
and it was estimated that 30 to 40 per 
cent of the grain was lost. This loss 
is not included in the table of yields. 
June 15 all plats were cut with a 
binder, stacked in the field, and later 
thrashed with a stationary thrasher. 
The table following shows the vields 
in hay and grain in pounds per acre. 
the quantity of water applied, and the 
cost of irrigation. The accompanying 
diagram (fig. 6) -hows the yields of grain platted with the corre- 
sponding amounts of water applied to each check. 
Fig. 6. — Yield of oats and wheat, 
with different quantities of water. 
