IRRIGATION" AT UNIVERSITY FARM, DAVIS, CAL. 
15 
irrigation. It was noticed, however, that the Egyptian corn (white 
durra) was much slower in coming up, and in the early stages of 
growth developed very slowly, especially during the cold spring 
weather of 1911. 
The area originally was divided into three plats. Xo. 1 containing 
0.9 acre : Xo. 2. 0.16 acre ; and Xo. 3. 0.67 acre. About the middle of 
June it was seen that the yield from the unirrigated plat, Xo. 1, was 
going to be small, and it was then subdivided into plats 1-A, 1-B, 
and 1-C, of 0.3 acre each. Plat 1-A was not irrigated, plat 1-B re- 
ceived one irrigation, and plat 1-C two irrigations. Following are 
the dates of irrigation and the quantities of water applied: 
Schedule of irrigation of Egyptian corn, 1910. 
Number of plat. 
Number of irriga- 
tions. 
Date. 
Depth. 
Status of corn. 
1-A None . 
One June 15 i 
/...do. ..I 
\July 14 
One July 13 
Olay 2S 
\July 14 
Inches. 
1-B 
1-C 
2... 
3... 
Two. 
Two. 
3.75 
1.75 
3.10 
3.25 
2.10 
Corn 24 inches high. 
Do. 
Corn forming heads. 
Do. 
Corn 4 inches high. 
Corn forming heads. 
During 1911 the experiment was repeated on the same soil. The 
first seeding on April 18 was a failure, and only about one-fourth of 
a stand came up. The plat was replowed. harrowed, and reseeded 
May 13 and a good stand obtained. The area was then divided into 
four equal checks and the following irrigation schedule outlined : 
Schedule of irrigation of Egyptian corn, 1911. 
Number of plat. 
Number of irriga- , -p. , 
tions. ; mte - 
Depth. 
Status of corn. 
1 
2 
3 
4 
None. 
One.. 
Two. 
Three. 
June 21 
/..do 
\July 18 
' I June 22 
Uulv 18 
,Uug. 8 
Inches. 
1.8 
2.6 
2.0 
2.3 
1.9 
1.5 
Corn 6 inches high. 
Do. 
First heads forming. 
Corn 6 inches high. 
First heads forming. 
Corn in the dough. 
In all irrigations the furrow method was practiced, the water being 
applied in alternate furrow spaces. A thorough cultivation followed 
each irrigation, and the whole area was kept free from weeds during 
both seasons. 
In harvesting, which occurred the first of October, the heads were 
picked, hauled, and thrashed, and later the stalks were cut with a 
mowing machine. 
