44 Tearhook of the DepartTnent of Agriculture, 1921, 



Fig. 41. — rThe acreage of wild or prairie hay is found mostly in the Spring Wheat 

 Area, the western margin of the Corn Belt and Corn and Winter Wheat Region, and the 

 eastern portion of the Great Plains ; in brief, in the northern part of the subhumid 

 belt. East of this belt the moister climate permits the cultivation of timothy and 

 clover, which are more productive (see Figs. 39 and 40) ; and west of this belt the 

 climate is so dry that the grass normally does not grow high enough to cut (see Figs. 

 4 and 7). The acreage shown in Wisconsin is mostly marsh hay and that in the 

 Western States Is located largely in moist mountain valleys or on high plateaus 

 (see Fig. 3). 



