12 



BULLETIN 133, U. S. DEPARTMENT OF AGRICULTURE. 



Table VI. — Results obtained with corn on fall-irrigated land (Series VI) and on land 

 not fall irrigated (Series VII) at the Scottsbluff Experiment Farm in 1912 and 1913. 





Yield per acre. 



Pounds 



of stover 



Year and plat. 



Stover (pounds). 



Grain (bushels). 



per bushel of grain. 





VI. 



VII. 



VI. 



VII. 



VI. 



VII. 



1912, 

 Plat 2 



4,400 

 3,700 



4,650 

 3,100 



57.2 



47.2 



52.7 

 44.9 



76.9 

 78.4 



88.2 



Plat 7 



69.0 









4,050 



3,875 



52.2 



48.8 



77.5 



79.4 







1913. 

 Plat 6 



4,000 

 4,850 



4,100 

 3,040 



70.0 

 62.1 



56.4 

 40.0 



57.1 

 78.1 



72.7 



Plat 11 



76.0 







Average 



4,425 



3,570 



66.0 



48.2 



67.0 



74.1 





4,212 



3,722 



59.1 



48.5 



71.3 



76.7 







Difference in favor of fall Irrigation 



+490 



+ 10.6 







5.4 



SUGAR BEETS. 



The soil treatment for sugar beets was the same as that previously 

 described in connection with the other crops in this experiment. 

 Sugar beets were planted in 1911, 1912, and 1913. 



In 1911 the beets were planted on April 30. At this time the soil 

 on Series VII, which was not fall irrigated, was so dry that none of 

 the seeds germinated until about May 20. At this time heavy winds 

 caused considerable soil drifting, which so damaged the crop on 

 Series VII that the stand was reduced to such a point as to be con- 

 sidered a failure. It was too late to reseed, and sugar beets were 

 therefore discarded for the year 1911. 



In 1912 the beets were planted on April 27 in rows 20 inches apart, 

 the seed being planted at the rate of 15 pounds per acre. Soil drift- 

 ing again destroyed the stands, and the plats were reseeded during 

 the second week in May. A good stand was secured from the second 

 seeding. The beets were irrigated three times during the season. 



In 1913 the beets were planted on May 20 in rows 20 inches apart, 

 the seed being planted at the rate of 17 pounds per acre. The plants 

 were thinned to 12 inches apart in the row. The crop was irrigated 

 three times during the season. The numbers of the plats and the 

 yields per acre obtained daring 1912 and 1913 are stated in Table VII. 



Table VII shows that the average yield of sugar beets was higher 

 each year on the fall-irrigated land than on the land which received 

 no fall irrigation. The average results of the two years show an: 

 increase of 1.6 tons per acre in lavor of fall irrigation. 



