WHEAT IN THE UNITED STATES 243 



larger than are the fields which are given to any 

 particular kind of crop. Fields are generally of 

 moderate size. The area of the common wheat 

 field is usually not more than from 40 to 80 acres. 

 Such plows and harrows are purchased as may also 

 be used to advantage in producing other small 

 grains and corn. 



FIG. 106. Plowing for wheat on the loess plains of Nebraska. 



Plowing, if for spring wheat, is done late in the 

 autumn or early in the spring ; if for winter wheat, 

 the favored season is early, even as early as July. 

 The two-bottom gang or the single-bottom sulky 

 is the type of plow used. The former is becoming 

 very widely used because it is a size well adapted 

 to the fields of this region. 



The ground is harrowed immediately before 



