RELATION OF FOOD TO MANURE 



much for it as the value of the fertility contained in 

 it. If he sells milk he receives 40 times as much as 

 the fertility contained in it, and if he sells butter his> 

 returns are 1,000 times as much as is the value of the 

 fertility sold in the butter product. 



FERTILIZING CONSTITUENTS IN CERTAIN PLANT AND 

 ANIMAL PRODUCTS 



Loss of Fertility Contained in Feed. Due to care- 

 less methods of handling manure, there is a tremen- 

 dous loss of fertility in the aggregate each year. 

 Much of the nitrogen is lost through fermentation 

 and leaching as fast as the manure is made. Much 

 of the potash is lost in drainage waters from the 

 stable and the barnyards. This loss can be greatly 

 lessened by the use of litter in the stables, by cov- 

 ered barnyards, and through the addition from day 

 to day of some preservative like acid phosphate to 

 the excrement as made. 



There is loss through leaching, not only in barn- 

 yards, but wherever manure is exposed to the influ- 



