FARM MANURE 



519 



OR.GA/V/C 

 MATTER 



*"£ £<%■ « z o 



E£T/I/A/£D 3YA/V/MAL 



Lost //v /-/a/vdjl//vg 

 amd ^to/sage 



ADDED TO THE SO/ L. 



Fig. 62. — Diagram showing the proportion of the important constituents 

 of the food retained by the animal, lost in the handling and the 

 storage of the manure and applied to the soil under ordinary 

 conditions. 



were not important, a self-sustaining system of agriculture 

 could not be established by the use of farm manure alone, as 

 organic matter is the only constituent that would be added 

 to the soil in amounts that approach the magnitude of the 

 loss. 1 



1 Fippin, E. O., Live Stock and the Maintenance of Organic Mat- 

 ter in the Soil; Jour. Amer. Soc. Agron., Vol. 9, No. 3, pp. 97-105, 

 Mar. 1917. 



