WINTER-WHEAT PRODUCTION" AT FORT HAYS STATION. 



15 



While this discussion is confined to winter wheat, the data would be 

 incomplete if the yields of the other crops in the rotations were 

 omitted entirely. For convenience of reference, the average yields 

 of the several crops in these rotations are shown in Table 6. 



Table 6. — Average yields of corn, hafir, harley,'^ and ivinter wheat in 4-year rotations 

 at the Fort Hays branch station for the 14-year period from 1907 to 1920, inclusive. 





m. 



Yields per acre for the several rotations (bushels) . 



Its 



51, corn, 

 barley, 

 rye,b 

 wheat. 



92, corn, 

 barley, 

 peas,'' 

 wheat. 



55, kafir, 



barley, 



rye,* 



wheat. 



56, kafir, 

 barley, 

 peasjb 

 wheat. 



57, corn, 

 barley, 

 fallow, 

 wheat. 



53, rye, 6 



barley, 



corn, 



wheat. 



54, peas, 6 

 barley, 

 corn, 

 wheat. 



Corn: 



Grain 



bushels.. 



pounds. . 



bushels. . 



5.5 

 2,514 



7.5 

 2,410 







6.6 

 2,361 



4.9 

 2,315 



5.4 



Stover 







2,417 



Kafir: 



Grain 



18.3 

 4,648 

 17.5 

 16.5 



20.3 

 4,698 

 19.2 

 15.5 





Stover 



pounds.. 













Barley 



Wheat 



bushels.. 



do.... 



16.1 

 13.4 



19.4 

 14.9 



19.6 

 19.0 



21.6 

 14.0 



20.4 

 16.2 



o Barley is for the 13-year period from 1908 to 1920, inclusive. b Plowed under for green manure. 



Com following winter wheat the second year after rye used as 

 green manure in rotation No. 51 has a 14-year average yield of 5.5 

 bushels of grain and 2,514 pounds of stover per acre. Corn on 

 similar preparation after peas used as green manure in rotation No. 

 92 has averaged 7.5 bushels of grain and 2,410 pounds of stover per 

 acre. In the similar rotation containing fallow instead of green 

 manure, No. 57, com has averaged 6.6 bushels of grain and 2,361 

 pounds of stover. Barley following the corn in these same rotations 

 has averaged for the 13 years from 1908 to 1920, inclusive, 16.1 

 bushels in rotation No. 51, 19.4 bushels in rotation No. 92, and 19.6 

 bushels in rotation No. 57. It has been shown that the yield of 

 wheat immediately following the green manure or fallow was 13.4 

 bushels after rye in rotation No. 51, 14.9 bushels after peas in rota- 

 tion No. 92, and 19 bushels after fallow in rotation No. 57. When all 

 three crops are considered the rye for green manure in rotation No. 

 51 shows to distinct disadvantage in comparison with peas or fallow. 

 Between the other two rotations no choice is to be made from the 

 behavior of the corn and barley, but for winter wheat the fallow 

 rotation shows a distinct advantage over the one containing peas. 



Rotation No. 53, rye for green manure, barley, corn, and winter 

 wheat, has made average yields of corn, 4.9 bushels; barley, 21.6 

 bushels; and wheat, 14 bushels per acre. Rotation No. 54 is the 

 same, with peas instead of rye for green manure. The average yields 

 from it are corn, 5.4 bushels; barley, 20.4 bushels; and wheat, 16.2 

 bushels. Comparing the two rotations the higher yields of wheat 

 and corn have been from the pea rotation and the higher yield of 



