1 88 SOILS AND FERTILIZERS 



of bran are fed. The liquid excrements are collected 

 and the manure is taken directly to the field and 

 spread. It is estimated that 20 per cent of the nitro- 

 gen and 4 per cent of the phosphoric acid and potash 

 are utilized for the production of flesh and milk. 



The comparative value of the manure from the two 

 farms is as follows : 



FARM No. i 



IN 10 TONS TIMOTHY 

 Lbs. 



Nitrogen . . 250 



Phosphoric acid 90 



Potash 400 



Loss in Urine < 



250 2 = 125 Ibs. nitrogen 



400 -r- 2 = 200 Ibs. potash 



Loss by Leaching 



125 x 0.30 37.50 Ibs. nitrogen 

 90 x 0.25 = 22.50 Ibs. phosphoric acid 

 200 x 0.25 = 50 Ibs. potash 



TOTAL Loss 

 Lbs. Per Cent 



Nitrogen 162.5 65 



Phosphoric acid ...... 22.5 25 



Potash 250.0 62 



PRESENT IN FINAL PRODUCT 

 MANURE FROM i TON TIMOTHY 

 Lbs. 



Nitrogen 8.75 



Phosphoric acid 6.75 



Potash 15.00 



Relative money value $1.00 



