﻿IRRIGATION AT UNIVERSITY FARM, DAVIS, CAL. 



15 





irrigation. Tt 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 1011. 



The area originally was divided into three plats, No. 1 containing 

 0.0 acre ; No. 2, 0.46 acre ; and No. 3, 0.67 acre. About the middle of 

 June it was seen that the yield from the unirrigated plat, No. 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 





Inches. 





1-B 



One 



June 15 

 /...do... 



\July 14 

 July 13 

 /May 28 

 \Ju!y 14 



3.75 

 3.75 

 1.75 

 3.10 

 3.25 

 2.10 



Corn 24 inches high. 

 Do. 



1-C 



Two 



2 



One 



Corn forming heads. 

 Do. 



3..... 



Two 



Corn 4 inches high. 







Corn forming heads. 



During 1011 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- 

 tions. 



Date. 



Depth. 



Status of corn. 



1 







Inches. 





2 



One 



June 21 

 /..do 



\July 18 

 iJune 22 

 -Uuly 18 

 lAug. S 



1.8 

 2.6 

 2.0 

 2.3 

 1.9 

 1.5 



Corn 6 inches high. 



3 



Two 



Do. 



4 





First heads forming. 

 Corn 6 inches high. 







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. 



