A Graphic ^wmmary of American Agriculture. 



45 



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Fig, 42. — Alfalfa demands soils that are not acid, and it is most easily cured in a 

 climate that is not rainy during the summer. Consequently, it thrives best in the 

 Western States, where it is grown mo.stly under irrigatitm, and fairly well in the 

 limestone sections of the East, where its culture is increasing rapidly. This increase 

 has been notable in the slightly subhumid section of eastern Kansas and Nebraska, 

 where the acreage has increased over sixfold in the past 20 years. Alfalfa ropInc^>s 

 wild hay in this area as the major hay crop. Seven-eighths of the alfalfa acreage is 

 west of the Missouri River (see Figs, 4, 6, and 16). 



