DRY-LAND CROPS 



red clover, white clover, alsike clover, 

 lucern and sweet clover. 



Each of these crops can be grown 

 advantageously only in certain clearly 

 defined regions. Moreover, for the par- 

 ticular purpose in view it rarely happens 

 that a choice of two or more equally 

 valuable legumes is offered. Usually one 

 is so much superior to any other that 

 substitution is practically out of the 

 question. In a few cases, however, the 

 use of one legume in place of another is 

 practicable. Thus, cow peas and soy 

 beans are agriculturally much alike and 

 are adapted to the same States. In a like 

 manner crimson clover, bur clover, and 

 the vetches may be used, one in place of 

 another, over a large area. In some sec- 

 tions of the coTintry the culture of red 

 clover is no longer profitable, owing to 

 various diseases. Alsike clover has been 

 used to some extent as a substitute, but 

 261 



