188 



DRY FARMING 



grass crop, the particles will be so held together by' the 

 "root fiber'' that little or no blowing will take place. 



(7) Different plants draw nourishment from dif- 

 ferent depths of soil. The grasses and cereals are con- 

 sidered to be shallow feeding crops. Alfalfa, sweet 

 clover and turnips are deep feeders. The use of both 



/-N 



33 fc.. 



c 



r^ r^ 



55 bu 

 OZhs 



;Z9.bu 



2>OlIo. 



l25.bu. 



JZZlfcs 



51. lis. 



WHgA T. VVMEffT WHEAToffer 



ATTEO. .AFTER. ROOTS or.d 



CORf< FALLOW RTTATDES. 



WHEAT WHCAT yVHCAT 



APTER APTER AFTHR 



PEA5 FLAX, WHEAT 



Fig. 73. — Summary of Rotation Tests at Saskatoon. 



types of crops increases the feeding ground and makes 

 possible the utilization of the soil to better advantage. 



(8) A good crop rotation systematizes the farm work. 

 In a good rotation the fields are approximately the same 

 size,* the amount of each kind of work is about the same 

 each year, and each season of the year; and the labor 

 and power requirements do not vary from season to 

 season and can be more easily and accurately estimated 

 and provided for beforehand. 



On more or less broken land fields of uniform size and good 

 shape may be Imposible to arrange. This, of course, is not an 

 essential, although a very desirable condition when practicable. 



