THE CLOVERS 



257 



part of the country, and in the western parts of the Pacific 

 Coast States. It grows at its best in what is known as the 

 northern corn belt states. Here it is usually grown in the 

 rotation, either alone or in combination with timothy and 

 other grasses. It is best adapted to well-drained loam 

 soils, which are sometimes called corn soils. While it 



Fig. 90. — Effects of lime on growth of red clover. Plot at left 

 received no lime ; the one at right received an application at the 

 rate of 1000 pounds of quick lime per acre. 



may be grown on soils of all degrees of fertility, except the 

 very poorest, it is not well adapted to clays, as are the 

 grasses. Red clover cannot withstand severe cold nor 

 extreme heat, and for that reason is not an important 

 crop in Canada nor in the Southern States of the United 

 States. Alfalfa is more drought-resistant and largely 

 takes the place of red clover in the semi-arid regions of 



