FARM MANURE 139 



gen, phosphoric acid, and potash in 'the timothy hay 

 were purchased in commercial forms they would cost 

 $5.30. Lawes and Gilbert estimate that 80 per cent, 

 of the fertility in fodders is, as a rule, returned in the 

 manure. 



In the following table are given the pounds of 

 nitrogen, phosphoric acid, and potash per ton of 

 some food materials : 57 



Nitrogen. Phosphoric acid. Potash. 

 Lbs. lybs. lybs. 



Timothy hay 25 9 40 



Clover hay 35 14 30 



Wheat straw n 4 12 



Oat straw 12 4 18 



Wheat : 45 20 12 



Oats 33 1 6 ii 



Barley 40 18 II 



Rye 42 20 13 



Flax '... 87 32 14 



Corn 32 14 8 



Wheat shorts 48 31 20 



Wheat bran 54 52 30 



Linseed meal 100 35 25 



Cottonseed meal 130 35 56 



Milk 10 33 



Cheese 90 23 5 



Live cattle 53 37 3 



Potatoes 7 3 u 



Butter i i i 



Live pigs.. 40 17 3 



173. Commercial Value of Manures. When the 

 value of farm manure is calculated on the same basis 

 with commercial fertilizers it will be found that 

 stable manure is worth from $2 to #3.50 per ton. The 

 value of the increased crops resulting from its use 



