28 FIELD CROP PRODUCTION 



a year to the rotation. Thus where corn is followed by 

 a spring crop such as oats, the farmer may sow cowpeas, 

 soy beans, clover, or vetch in the corn at last cultivation 

 and plow it under the following spring. Where oats, 

 wheat, or barley is followed by a cultivated crop to be put 

 in late the next spring, an even better opportunity is offered 

 for a catch crop. 



