FOOD CONSUMED TO MANURE PRODUCED 145 



about 792 pounds of dry matter in the manure. The 

 nitrogen, phosphoric acid, and potash in the food con- 

 sumed are nearly all returned in the manure, except 

 under those conditions which will be noted. The 

 manure from a ton of mixed feed, as clover and bran, 

 will be smaller in amount but more concentrated than 

 that produced from timothy. In a ton of timothy and 

 in a ton of mixed feed (1500 lbs. clover, 500 lbs. bran) 

 there are present : 



Timothy. Mixed feed. 



Lbs. Lbs. 



Nitrogen 25.0 40.0 



Phosphoric acid 9.0 24.0 



Potash 40.0 30.0 



The nitrogen, phosphoric acid, and potash in these 

 two rations are retained in the animal bodies in dis- 

 similar amounts ; that is, 10 per cent, more of these 

 elements are retained from the more liberal ration, due 

 to more favorable conditions for growth. Making al- 

 lowance for this fact there will be present in the ma- 

 nure from the mixed feed one-half more nitrogen, and 

 two and one-half times as much phosphoric acid, as 

 in the manure from the timothv hay, which, free 

 from bedding, contains about 792 pounds of indigesti- 

 ble matter while that from the mixed feed con- 

 tains 760 pounds, the mixed ration being more digesti- 

 ble. If both manures contain the same amount of ab- 

 sorbents, the manure from the ton of mixed clover 

 and bran will weigh slightly less, but contain more 

 fertility than that from the timothy hay. 



