10 



BULLETIN 133, U. S. DEPARTMENT OF AGRICULTURE. 



series was slow to germinate. The rains, which came on May 2 and 

 May 15, however, added sufficient moisture to the soil to start a good 

 stand on both series. The oats were irrigated twice during the 

 season. No difference was noted in the time of maturity, the grain 

 on all the plats having ripened on July 26. 



In the spring of 1912 the soil was in excellent condition when the 

 oats were planted on April 24, and good stands were secured on both 

 series. The oats were irrigated twice during the season. No differ- 

 ences were noted between the two series until the grain began to head. 

 From this time on the crop on the fall-irrigated plats was more vigor- 

 ous than on the plats which had not been fall irrigated. The grain 

 was ripe on both series on July 29. 



In the spring of 1913 the oats on the fail-irrigated plats germinated 

 much more promptly than those on the plats in Series VII. The 

 germination on the plats which were not fall irrigated was very irreg- 

 ular, but the rains which came in the early part of May added suffi- 

 cient moisture to the soil to produce satisfactory stands. The oats 

 were irrigated twice during the season. The grain ripened about 

 August 1 on both series. 



The numbers of the plats, the height of the oats at maturity, the 

 yields of straw and of grain, and the number of pounds of straw 

 accompanying the production of each bushel of grain during the 3-year 

 period are given in Table V. The plat numbers were the same in both 

 series each year. In Table V, the figures in the columns headed " VI " 

 relate to the fall-irrigated plats, while those in the columns headed 

 "VII" relate to the plats which were not fall irrigated. 



Table V. — Results obtained with oats onfall-irrigated land (Series VI)andon landnotfall 

 irrigated (Series VII) at the Scottsbluff Experiment Farm in 1911, 1912, and 1913. ' 





Height (inches). 



Yield per acre. 



Pounds of straw per 



Year and plat. 



Straw (pounds). 



Grain (bushels). 



bushel of grain. 





VI. 



VII. 



VI. VII. 



VI. 



VII. 



VI. 



VII. 



1911. 



Plat 4 



Plat 9 



40 

 40 

 38 



40 

 38 

 36 



3,3S0 2,610 

 3,350 3,280 

 3,790 3,640 



CO. 2 

 62.5 



76.8 



40.3 

 53.7 

 55.0 



51.1 

 53.6 

 49.3 



64.8 

 61.1 



Plat 13. 



66.2 







Average 



39 



38 



3,506 ) 3,178 



68.5 



49.6 



51.2 



64.1 



1912. 

 Plat 6 



41 

 44 

 42 



42 

 44 

 42 



2,920 

 4,920 

 4,670 



2,230 

 3,630 

 3,790 



65.6 

 113.0 

 105.2 



55.3 

 96.0 

 94.1 



44.5 

 43.5 



44.4 



40.3 



Plat 10 



37.8 



Plat 15 



40.3 







Average 



42 



42 



4,170 



3,216 



94.6 



81.8 



44.1 



39.3 



1913. 

 Plat 2 



43 

 45 



42 

 42 



3,000 

 3,620 



1,910 

 2; 100 



84.3 

 101.2 



76.5 

 97.5 



35.6 

 35.8 



24.9 



Plat 7 



21.5 







Average 



44 



42 



3,310 



2,005 



92. 7 



87.0 



35.7 



23.0 



Average results, 3 



41.9 



40.8 



3,656 



3,521 



83.8 



72.8 



43.6 



48.4 







Difference in favor of 

 fall irrigation 



+ 



1.1 



+ 135 



+ 11.0 



-4.8 



