CROP ROTATIONS 195 



5. The economic distribution of labor throughout the 

 year. 



6. The extent to which financial considerations make 

 necessary the growing of cash crops. 



7. The availability and cost of capital. 



8. The extent to which the rotation is likely to lessen 

 the risk of farming and insure commensurate re- 

 turns for the extra investment required. 



151. Some Well Known Rotations. The most common 

 rotation in England is turnips, grain, clover and grain ; 

 the old Norfolk rotation of Rothamsted is turnips, barley, 

 clover and wheat. 



The most common rotation of Ontario and the mixed 

 farming districts of the northeastern States is hoed crop, 

 grain, hay and pasture, although many modifications of 

 this are practised. Corn, oats, hay (timothy and red 

 clover) and pasture is the chief rotation of the stock- 

 growing and dairying districts. 



In the corn belt of the United States, corn often 

 alternates with oats, but the best rotation from the point 

 of view of soil productiveness is one or two crops of 

 corn followed by oats and then clover. 



In the spring wheat regions of the Great Plains Region 

 of America the pioneer rotation is fallow followed by 

 grain for two or three years. In the northwestern States 

 this is generally giving way to corn followed by two or 

 three grain crops. In the Southern Great Plains Region 

 the sorghums are gradually replacing the fallow, while in 

 the Prairie Provinces of Canada no improvement in the 

 original fallow and grain rotation has yet established 

 itself, although several modifications of it are in a fair 

 way to do so in some parts. 



