294 . BULLETIN 10%, U. S. DEPARTMENT OF AGRICULTURE. 
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 ae 
of these crops. 
TABLE 10.— Yrelds of wheat on disked ground following corn or kafir with different spacings 
at the Fort Hays branch station for the 5-year period from 1916 to 1920, inclusive. 
Yields per acre (bushels). 
After corn. After kafir. 
Year. oe ee ee 
Rotation | Rotation] Rotation| Rotation 
149, 150, 349, 350, 
ordinary double ordinary double 
spaced. | spaced. | spaced. | spaced. 
2K pe Em Sateen ars Penn cepa Tk Ae aes tS © Ocak 34, 1 39. 1 15. 1 31.1 
AOD ce As Seep ae slain a ts BES aati eae poe de rloyarar> + «2 ee 3.1 3.3 -0 .6 
POTRE ee ree a a noo St ee ne Pee nes coves eee 13.3 10.1 1.0 3.8 
OMG eee Soe ~ Sees Seis re Se Be ee ei gee cick = See eee 18.1 18.3 20. 6 18,6 
113 0 se Ria ae gem neraseee, Bale ab, 5 a 5 ie ee RMN lay 25.1 28. 6 19.2 23.5 
AWVELUQ Cl once so lee Seas Sees eae Skee De ots oe ee eee 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—O 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 yielding 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- 
