LEGUMINOUS PLANTS. 



125 



twice the ciniouiU of dioestihlc nutrients as that 

 of one acre of oats yielding- fort)- l)nsh(?ls, and 



KIG. 34. — THE SOY-BEAN. 



40 per cent, more than that produced by an acre 

 of corn yielding- thirty bushels. 



When cow-peas are grown to enrich the soil 

 the hay may be fed to stock and the manure 

 returned to the field, or the vines ma)- be plowed 

 under in the fall, and the field sown in oats, rye, 



