CULTIVATION AND GROWTH 



21 



wheat is grown In the United States for which the 

 plowing is done by only one horse. This method 

 is used only on small tracts in very hilly districts. 

 The single furrow riding plow predominates in 

 the mixed farming portions of the Central states. 

 There wheat is important, but is not the only 



FIG. 12. Plowing with the common two-bottom gang plow. Each cutting lay 



makes a twelve-inch furrow. 



profitable crop. It has keen competitors in corn, 

 oats, clover, and alfalfa. Land is high priced. 

 For these various reasons fields are moderate in 

 size, ranging usually from twenty to sixty acres 

 each. Hence the riding plow, locally called the 

 ''sulky," seems to be best adapted to the farming 

 conditions. It cuts a sixteen-inch furrow, runs 

 on three wheels, and is pulled by three or four 



