﻿14 



BULLETIN 10, TJ. S. DEPARTMENT OF AGRICULTURE. 



Schedule of irrigation of Indian corn, 1911. 



Number of plat. 



Number of 

 irrigations. 



Date. 



Depth of 



water 

 applied. 



Status of corn. 



1 







Inches. 





2 



One 



Two 



Three 



June 22 

 /June 21 



tfuly 17 

 iJune 21 

 {July 17 

 [Aug. 8 



2.3 



2.2 

 2.5 

 2.3 

 2.4 



2.4 



Corn 20 inches high. 



3 



Do. 



4 



Corn coming in tassel. 

 Corn 20 inches high. 





Corn coming into the milk. 



In each o-f these irrigations the furrow method was used, a small 

 stream running in each furrow for a long period, thus avoiding 

 flooding and, as in previous seasons, a thorough cultivation following 

 each irrigation. 



August 16 and 17 the corn was harvested, weighed, chopped, and 

 stored for winter use. 



The following table shows the results obtained for the two seasons : 





Summary of results of irrigation of com. 







Season. 



Number 

 of plat. 



Number of irrigations. 



Depth. 



Yield per 

 acre. 



Value at 



$2.50 

 per ton. 



Cost of 

 irriga- 

 tion. 





1 ! 



I i 





Inches. 



Tons. 

 6.85 

 8.85 

 10.05 

 10.45 

 3.67 

 4.86 

 5.21 

 6.59 



$17. 13 

 22.13 

 25.13 

 26.13 

 9.18 

 12.15 

 13.03 

 16.48 







One 



3.3 



5.3 



8.0 



$1.50 



1910 



Two 



2.60 





Three 



3.90 











One 



3.0 



4.8 

 7.1 



1.40 



1911 



Two 



2.45 







Three 



3.65 









Note.— Cost of irrigation taken at 30 cents per acre-inch for water and application, plus 50 cents per acre 

 per irrigation for furrowing. 



The most noticeable feature in these results is the decrease in yield 

 in 1911, when compared with the yield in 1910. This is due entirely 

 to the character of the season. The late spring of 1911 was abnor- 

 mally cold and very unfavorable to the production of a good yield, 

 even in the presence of an abundance of moisture. 



During 1910 one and two irrigations were applied to advantage, 

 while the third irrigation just before harvesting produced an increase 

 of but 0.4 ton per acre green weight, and was applied at a loss. 



The season of 1911 shows light yields and small increases, and if 

 interest on the investment in pumping machinery and cost of leveling 

 the land be added to the cost of irrigation no financial gain would be 

 realized. 



EGYPTIAN CORN. 



This investigation followed along the same lines as the investiga- 

 tions with Indian corn, the preparation of the land, time of seeding, 

 and entire procedure being the same up until the time of the first 



