24 



Western Live-stock Management 



acreage, alfalfa is by far the biggest crop. The dry-farm 

 sections are farmed under the dry-farm system, which is 

 essentially summer fallow and careful tillage adapted to 

 using two years' moisture for the growing of one crop. 

 These lands are largely on the rolling hills which have a 

 good soil and an annual rainfall of tweh'e to twenty 

 inches. The largest dr\--farm areas are found in the 



Fig. 4. 



eastern parts of INIontana, in the Columbia Basin in 

 eastern Oregon and Washington, and in the central val- 

 leys of California. The big crop in the large dry -farm 

 areas, and in fact very commonly the exclusive crop, is 

 wheat. In some places rye is grown as a hay or forage 

 crop, and farther south the sorghums, milo maize and 

 similar drouth-resistant jDlants are groAAu as a feed for 

 stock. These areas, however, must be considered very 

 largely as wheat-growing districts and they produce live- 

 stock only on a limited scale, with the exception of horses. 



