138 COTTON 



Where this method is practiced, it combines easily 

 with winter or cover crops like clover or rye, and as 

 plant food is released it is stored in stem, root, and 

 leaf of the growing plant, thus leaving a wealth of 

 plant food and humus in the soil for other crops 

 that come later. 



GREEN MANURES 



A green crop plowed under offers another quick 

 way of improving the productive power of the soil. 



For this work you can use clover, rye, or cow- 

 peas. Glover and cowpeas are preferred, since 

 they add humus abundantly, and at the same time 

 gather atmospheric nitrogen and store it in the soil. 



