CEREAL CULTIVATION GREAT PLAINS 349 



corn and is seeded down with clover, winter wheat can 

 replace oats, but should be drilled in the standing corn in 

 early September. Clover is then added in the spring. 

 Special one-horse drills are made for driving between the 

 corn rows (Fig. 107). It may be desirable to put only a 

 part of the corn ground in winter wheat and the remainder 

 in oats or barley, thus lengthening the period of harvesting. 



FIG. 107. One-horse drill for seeding small grain between corn rows. 



376. Summer tillage is the cultivation of the soil 

 throughout an entire season without growing a crop, and 

 is practiced in preference to other methods, primarily for 

 the storage of soil moisture. There is also a considerable 

 liberation of plant-food, and, as nothing is returned to 

 the soil, it is an exhaustive cropping method. It is not 

 a fallow, as the latter was often formerly understood, but 

 directly opposed to it. The land is plowed, either in the 



