WINTER- AVHEAT PRODUCTION" AT FORT HAYS STATTOIST, 31 



The results of experiments with sod crops in rotations show thein. 

 to be relatively unsuccessful themselves. Alfalfa is more successful 

 than brome-grass, but is very depressing in its effect upon following 

 crops. Wheat after corn averages about the same as the better 

 methods of wheat after wheat. Kafir produces heavier yields of 

 both grain and forage than corn, but wheat can not be sown imme- 

 diately after kafir without great reduction in yield. The depressing 

 effect of kafir is, however, eliminated by a single year of fallow or 

 cropping. Barley, which is spring sown, follows kafir as well as it 

 does other crops and produces relatively good yields. Winter wheat 

 follows barley as well as it does wheat or other crops. This establishes 

 in the rotation a place for barley between kafir and winter wheat. 



The use of barnyard manure at different rates and in different posi- 

 tions in 3-year rotations of kafir, fallow, and winter wheat for the 

 8-year period from 1913 to 1920, inclusive, has not had a measurable 

 effect upon the yields of either wheat or kafir. 



The experiments do not indicate that a reduction of the proportion 

 of wheat to other crops would necessarily result in an increased aver- 

 age yield per acre of wheat. They do indicate, however, that the 

 present average yield per acre is not as high as it should be. The 

 most fertile field for the control of yields is the 90-day period between 

 harvest and seeding. The more completely this is made a cultiva- 

 tion period the higher will yields rise above the minimum at which 

 they now rest. An increase of 50 per cent is not impossible, and 

 some part of it should be realized through greater timeliness and 

 efl&ciency of operations. 



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