198 



FARM MANAGEMENT 



food in fertilizers would cost about $30 per year. Table 

 30 gives results obtained by Roberts. 



Hogs eat nearly twice as much for their weight and 

 give about twice as much value in manure. Hens eat 

 over twice as much as cattle for their weight and return 

 twice as much value in manure, but the manure is very dry 

 and very concentrated. 



How much manure is worth per ton depends on how 

 much it is needed, what it can be bought for, the kind 'of 

 crops to be grown, and many other factors. Much of the 

 manure is always lost. The cost of hauling and apply- 

 ing is very great compared with using fertilizers. On 

 most farms it is worth $1 a ton at the barn. On some 

 truck farms near cities it is worth $2 or more per ton. 



TABLE 30. MANURE PRODUCED PER 1000 POUNDS OF LIVE 

 WEIGHT 



1 The nitrogen is figured at 16 cents and the other constituents at 

 4 cents per pound. 



The amount of manure produced must be considered 

 in planning a cropping system for a farm. If one wishes 

 to manure one-fifth of the land every year with ten tons 



