78 



FARM MANAGEMENT 



states is shown in Figure 20. The yield of corn follows 

 almost exactly the rainfall for June, July, and August. 



For products that are easily stored, such as cotton and 

 grain, the years of highest yields are often, but not always, 

 the years of highest value per acre. But for perishable 

 crops, like potatoes, cabbages, and apples, the years of 

 high production are usually the years of lowest value per 

 acre. More perishable crops, as fresh vegetables and straw- 

 berries, are still more subject to violent changes in price. 



TABLE 13. RELATION OF YIELD PER ACRE TO VALUE PER ACRE 

 OF CORN, COTTON, AND POTATOES IN THE UNITED STATES l 



U. S. Dept. Agr., Yearbook, 1900, 1910, and 1911, 



