240 SOILING CROPS AND THE SILO. 



be depended on westward in the section, because of 

 the want of moisture in the autumn. 



Succession in Section No. 6. — In the mountain 

 valleys in this section, alfalfa, medium red clover, 

 peas and vetches will probably furnish the chief 

 soiling foods through all time. In the valleys 

 lying southward these crops will be grown under 

 irrigation. On the bench lands adjacent to the 

 mountains, they will be supplied with moisture 

 from seepage waters percolating downward be- 

 cause of the melting of the snows upon the 

 mountains. In the valleys lying northward these 

 crops will in many instances be grown without 

 irrigation. 



The possible succession of soiling crops would 

 include winter yye, the winter vetch, alfalfa, medium 

 red clover, alsike clover, mixed grains as peas and 

 eats, the sand vetch, rape, field roots and cabbage. 

 The more restricted succession would include alfalfa, 

 medium red clover and peas and oats, or peas 

 and vetches. In the valleys lying southward, much 

 prominence should be given to the winter vetch, and 

 some use could also be made of corn. Alfalfa alone 

 could be made to supply soiling food during nearly 

 all the growing season. Especially is this true of the 

 valleys north of the Canadian Ijoundary. In the 

 semi-range lands of Washington and Oregon where 

 the conditions are dry, and where irrigating waters 

 cannot be supplied, and where also the nights are 

 cool, the succession would have to be restricted to 

 such crops as mixed grains of which wheat would be 

 one of the chief, Austrian brome grass, (Bromus 

 inermis) and rape. 



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