22 AGKICULTUEAL EXPEKIxMENT STATION. [Jan. 



cost of these articles in the open markets. When tlic experi- 

 ment was in operation this amounted to 15 cents per pound 

 for nitrogen, f)^ cents per pound for })hosphoric acid and 4|- 

 cents per pound for potash. The net cost of a ration is that 

 cost remaining after the value of the manure has been de- 

 ducted from the total cost. It is to be observed that the 

 value of the manure, i.e., its content of nitrogen, phosphoric 

 acid and potash, depends entirely u})on the character of the 

 fodder articles fed. Thus, if the feed consists of corn meal 

 and hay, each of which articles have an obtainable manurial 

 value of about $5 per ton, the value of the manure will l)e 

 consideral)ly inferior to one where cotton-seed meal with an 

 ol)tainable manurial value of about $20 per ton or wheat bran 

 with an obtainal)le manurial value of $10 per ton are fed. 



All the concentrated feed stuffs, such as linseed meal, 

 cotton-seed meal, gluten meal, gluten feed and wheat bran, 

 have a very high percentage of nitrogen, which greatly 

 increases the value of the manure produced by the animal. 



• Cow consumed five pounds less hay per day during this period. 



