142 INTENSIVE FARMING 



wheat, and flax does not overlap the period 

 when excessive man and horse labor is required 

 by potatoes and beans these crops might be sat- 

 isfactorily worked into a rotation. 



Chart E represents the horse power required 

 by the combined potato-bean and corn-oats- 

 wheat-flax rotations. While there are appreci- 

 able variations in the combined requirements of 

 these rotations, the fluctuation is not greater 

 than in either alone. In fact, they correspond 

 pretty closely to the variations shown in the 

 bean-potato rotation alone. 



Chart F shows a combination of the man 

 labor required on the potato and bean farm 

 and the man labor required on the farm produc- 

 ing corn, oats, wheat, and flax. While the maxi- 

 mum requirement is slightly raised above the 

 maximum requirement for potatoes and beans, 

 this increase is very slight, and at other points 

 in the chart the maximum is very much more 

 nearly approached by a combination of these 

 rotations than by growing either of them sepa- 

 rately. 



The point is that if it were possible to have 

 labor charts for each of the standard crops 

 grown in any crop zone it would be possible 

 to take into consideration, in making up a crop 

 rotation, not only the returns from the crop in 



