15° 



SOILS AND FERTILIZERS 



Nitrogen. Phosphoric acid. Potash. 



Lbs. Lbs. Lbs. 



Timothy hay 25 9 40 



Clover hay 45 14 30 



Wheat straw 11 4 12 



Oat straw 12 4 18 



Wheat 45 20 12 



Oats 33 16 11 



Barley 40 18 1 1 



Rye 42 20 13 



Flax 87 32 14 



Corn 32 14 8 



Wheat Shorts 48 31 20 



Wheat Bran 54 52 30 



Oil meal 100 35 25 



Cottonseed meal 130 35 56 



Milk 10 3 3 



Cheese 90 23 5 



Live cattle 53 37 3 



Potatoes 7 3 11 



Butter 1 1 1 



Live pigs 40 17 3 



179. Commercial Value of Manures. — When the 

 value of farm manure is calculated on the same basis 

 as that of commercial fertilizers it will be found that 

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

 value of the increased crop resulting from the use of 

 manure will vary with conditions. It is sometimes 

 stated that the phosphoric acid and potash in stable 

 manures is not as soluble as that in commercial fer- 

 tilizers, and consequently it is worth less. While not 

 so soluble in the form of manure, it frequently hap- 



