CROPPING SYSTEMS FOR STOCK FARMS 283 



SCHEME OF ROTATION FOR A HOG FARM IN A REGION A LITTLE 

 SOUTH OF MIDDLE LATITUDE 



First rotation Second rotation 



First year ... 14 acres in corn and cow- First year . . 6 acres of corn 

 peas 



Second year. 14 acres in corn, wheat ~ v , , f 3.6 acres of corn 



and clover ' \ 2.4 acres of hay 



Third year ...-< 2.4 acres of sow 

 pasture 



"By feeding a good deal of corn stover to horses, there ought 

 to be hay enough to feed a cow on this farm. A fair crop of 

 hay may be cut from the pig pasture about the first of July. This 

 hay will contain a good deal of wheat straw, but will answer very 

 well for pig feed in winter. The sow pasture will have to be 

 fenced off each year with a temporary fence. 



"On account of the variation in yields, in some years there 

 will be more corn than can be utilized, while in other years there 

 will be less than is needed. This is true in all forms of live-stock 

 farming. Some men meet this difficulty by keeping fewer ani- 

 mals than the farm would support with average yields, and thus 

 in good years have some crops for sale. Others meet it by 

 changing the number of animals from year to year to suit condi- 

 tions. Still others keep a maximum number of animals and buy 

 feed when needed. As before stated, everyone must be his own 

 judge in matters of this kind. 



"In the system of hog management outlined it is clear that in 

 a section where corn can be bought at a price that permits it to 

 be fed to hogs with a profit, the limit to the number of hogs that 

 can be kept on the farm is the area of pasture that can be pro- 

 vided. With a winter cereal and clover furnishing this pasture, 

 it would be possible to keep half the land in pasture by growing 

 a two-year rotation of corn followed by wheat and clover, these 

 being sown together in August in the corn. 



"To ascertain the number of hogs 60 acres may be made to 

 support under this last rotation, we deduct the 10 acres required 

 to raise feed for the horses and divide the remaining 50 acres by 

 a divisor obtained as follows : 



