338 DRY FARMING 



if there are perennial weeds, persistent cultivation is 

 necessary to kill them. 



Hay crops may be used as a partial substitute for 

 summerfallow. For this method to be successful the sod 

 must be plowed early so as to be well rotted and to 

 provide for the accumulation of moisture. At the best 

 there will not be as much moisture conserved as in a bare 

 fallow but practical results have been satisfactory and it 

 is only by the use of sod-forming crops that the soil 

 drifting menace can be overcome. 



ROTATIONS. 



289. Rotations now in Use. The standard rotation 

 generally in use in the western part of Manitoba is sum- 



Fig. 103. Cutting Western Rye Grass and Alfalfa at Brandon Experi- 

 mental Farm. 



merfallow and three crops of grain. Wheat practically 

 always follows the snmmerfallow, the second year after 

 fallow being sometimes wheat and sometimes oats and 

 the third year oats or barley. In the early grain grow- 



