24 



BUI.L.ETIl^J- 1094, U. S. DEPARTMENT OF AGEICULTTJEE. 



9 bushels over ordinary-spaced kafir and 4.7 bushels over double- 

 spaced kafir. More adequate comparisons of corn with other crops 

 and preparations for winter wheat have been made elsewhere in this 

 bulletin. The object of these rotations is to afford a comparison of 

 corn with kafir and of ordinary spacing with double-spaced plantings 

 of these crops. 



Table 10. — Yields of wheat on dished ground following corn or Izafir with different spadngs 

 at the Fort Hays branch station for the 5-year period from 1916 to 1920, inclusive. 





Yields per acre (bushels) . 



Year. 



After corn. 



After kafir. 





Rotation 



149, 

 ordinary 

 spaced. 



Rotation 



150, 

 double 

 spaced. 



Rotation 



349, 

 ordinary 

 spaced. 



Rotation 



350, 

 double 

 spaced. 



1916 



34.1 

 3.1 

 13.3 



18.1 

 25.1 



39.1 

 3.3 

 10.1 

 18.3 

 28.6 



15.1 



.0 



1.0 



20.6 



19.2 



31.1 



1917 



.6 



1918 



3.8 



1919 



18.6 



1920 



23.5 







Average 



18.7 



19.9 



11.2 



15.5 







The ordinary-spaced corn averaged 2.1 bushels of grain and 2,531 

 pounds of stover. The double-spaced corn averaged 8.8 bushels of 

 grain and 2,286 pounds of stover. The ordinary-spaced kafir aver- 

 aged 10.7 bushels of grain and 4,748 pounds of stover. The double- 

 spaced kafir averaged 15.1 bushels of grain and 3,627 pounds of stover. 



WHEAT IN MISCELLANEOUS ROTATIONS. 



In Table 8 were given the yields of wheat on two plats in rotation 

 No. 401 and one plat in rotation No. 402. For comparison with these 

 the yield of wheat on the N-0 plats in the methods-of-fallow exper- 

 iment for the same years is included in the table. Rotations 

 Nos. 401 and 402 were started in the spring of 1913. Spring wheat 

 was sown in them that year, so that results with winter wheat are 

 available for only the 7-year period from 1914 to 1920, inclusive. 



No. 401 is a 4-year rotation of kafir listed, fallow, winter wheat on 

 fallow, and winter wheat on early-plowed wheat stubble. The 

 wheat on fallow has averaged 20.7 bushels and on fall-plowed wheat 

 stubble 21.4 bushels. These figures present the interesting evidence 

 of wheat after wheat jnelding more than after fallow. The yield of 

 straw supports the evidence of the yield of grain. As these are in. a 

 rotation where one follows the other, there is no ground for an argu- 

 ment that one has any soil advantage over the other. The yield 

 following fallow is a little low as compared with that on fallow after 

 kafir in the near-by 3-year rotations Nos. 501 to 510, inclusive, con- 



