724 



EXPERIMENT STATION RECORD. 



able. The principal results of tests of various rates of seeding are shown in 

 the following table: 



Yields secured with the more successful rates of seeding. 



Winter wheat . . 



Do 



Spring wheat . . 



Oats 



Common barley 

 Hull-less barley 

 Emmer 



Rates 

 tested. 



Optimum 

 rate. 



Pecks. 

 2,3,4, and 6 

 2,3,4, and 5 



2, 4, and 5 

 2,4,6, and 8 

 2,4,6, and 8 



2, 4, and 6 

 2,4,6, and 8 



Pecks. 



Period. 



1906-1910 

 1907-1910 

 1907-1910 

 1907-1910 

 1907-1910 

 1907-1910 

 1906-1909 



Average 

 yield. 



Bushels. 

 47.2 

 49.0 

 21.6 

 47.4 

 24.4 

 12.8 

 38.1 



In 1909 winter wheat on socl land yielded 40.5 bu. per acre when seeded 

 October 22 as compared with 36.8 bu. when seeded September 21. On summer 

 tilled land it yielded 40.9 bu. when seeded September 14 as compared with 22.8 

 bu. when seeded September 30. In 1910 on summer tilled land the yield fol- 

 lowing sowing September 15 was from 5 to 22 bu. higher than that following 

 seeding on earlier or later dates. Spring wheat sown April 1 produced higher 

 yields than when sown at any later date in 1909, and that sown March 17 

 excelled later seedings in 1910. The higher yields secured in variety tests are 

 indicated in the following table: 



The higher yields obtained in variety tests. 



" The average results of the 3 seasons . . . indicate that drilling increased the 

 yield of spring wheat 7.4 bu. per acre, of barley 7.7 bu. per acre, of oats 10.7 

 bu. per acre, and of emmer 10.8 bu. per acre." The results of other tests of 

 methods are indicated in the following table : 



Effect of various treatments on yield. 



