48 YearlooTc of the Department of Agriculture, 1921, 



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Fig. 47. — This map shows only the acreage of peas allowed to ripen for grain or 

 seed. The acreage of green garden peas, even when grown in the field for canning, is 

 shown in Figure 56. Peas cut for hay or forage are included in " Annual Legumes," 

 Figure 46. Cowpeas, which are more like a bean than a pea. are of importance as a 

 seed crop only on the Piedmont and Upper Coastal Plain of the Soutli, extending as 

 far north as Maryland and c(>ntral Illinois. Canada peas, which thrive only in a cool 

 climate, are grown mostly in Wisconsin, especially on the heavy soils of the Door 

 Peninsula, in northeastern Michigan, and in the higher or cooler districts of the Rocky 

 Mountain Region. 



