I Nitrogen, 16.6 66.4 22.1 



Sheep, < Phosphoric acid, 4.6 18.4 6.1 



( Potash, 13.4 53.6 



17.9 



Total plant food, 34.6 13^.4 46.1 



r Nitrogen, 9.00 36.0 12.0 



Hogs, ■< Phosphoric acid, 3.80 15.2 5.0 



(Potash, 12.00 48.0 16.0 



Total plant food, 24.8 99.2 33.0 



The amount of manure produce 1 annually has been esti- 

 mated as follows, for a 1,000 pound ox : 



Nitrogen. ^'''"'^.^.'"''^ Potash. 



Solid manure, 20,000 lbs. containing, 96.4 46.6 96.0 



Liquid '' 10,000 " 95.5 160.9 



Total per year, 191-9 46-6 256.9 



At the prices usually placed upon nitrogen, phosphoric acid 

 and potash, the liquid manure would be worth $23.95, ^^^ ^^^ 

 solid $23.01, a total of $46.96, provided it could be saved, but 

 owing to the ease with which urine decomposes, there is great 

 difficulty in saving the nitrogen in the liquid manure, and if we 

 remember that $16.71 of the value of the total manure, or thirty- 

 five per cent is in the form of nitrogen in the urine, it at once 

 becomes evident that farmers should take every precaution to 

 save this element. 



Those who draw their farm yard manure, liquids and all, 

 and spread them on the land as fast as produced, without doubt 

 handle the urine with the least waste. Next to this the use of 

 a liberal amount of absorbants, cut straw, saw-dust, muck, etc., 

 and the presence of hogs on the manure pile, thus keeping it 

 compact and excluding air, is probably the best method. 



BONES. 



One of the earliest substances used as a fertilizer, aside 

 from manures, was bone. Waste bone chips and horn parings 

 were first used about 1 750, and later, say about 1780-1800, bones 

 became a comparatively common manure in England and Scot- 

 land for turnips. An average sample of bone will have the fol- 

 lowing composition per one hundred pounds : Thirty pounds of 

 animal matter containing two and one-half pouds of nitrogen, 



13 



