CROP-ROTATIONS 



seeding to wheat and grass with a minimum 

 amount of labor. The rotation is excellent 

 where there is enough fertility for the potato, 

 which usually can be by far the most profitable 

 crop in the entire rotation. 



A Three Years' Rotation. Farm conditions 

 may require that certain fields in the farm go un- 

 der a crop-rotation covering three years. In the 

 winter-wheat belt this may be clover, corn, and 

 wheat, or clover, potatoes, and wheat. It is an 

 excellent rotation when early planted potatoes or 

 silage corn follows the sod, favoring the wheat in 

 which the clover again is seeded. The ground is 

 plowed only once in three years. The clover 

 furnishes hay for the farm, and organic matter 

 with nitrogen for the land. There are two cash 

 crops in the rotation when potatoes are grown, 

 and that makes a heavy draft upon fertility. 

 Experience has demonstrated that commercial 

 fertilizers or manure become necessary as a supple- 

 ment to clover in a three years' rotation embrac- 

 ing potatoes. This rotation gives good control 

 of most weeds and insect enemies. 



Where wheat is unprofitable, the oat crop is 

 used in its stead. If mixed hay is wanted, timo- 

 thy is sown with the clover. This is poor practice 



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