MANURE VALUE OF FOODS. 



139 



The immense influence of the character of the diet, 

 both on the quantity and quality of the manure, is well 

 shown by the two experiments with cows ; the difference 

 appears chiefly in the urine. 



The richness of the urine, both in ash constituents 

 and nitrogen, is in all cases very evident. In the case of 

 the more highly-fed oxen, the dry matter of the urine is 

 seen to contain over 20 per cent, of nitrogen. 



Manure Value of Poods. The relative value of the 

 manure produced by different foods is determined by the 

 relative richness of the foods in nitrogen and ash con- 

 stituents, but chiefly by the amount of nitrogen, this 

 being the most costly ingredient of purchased manure. 

 The average amount of nitrogen, and of the two most 

 important ash constituents contained in ordinary cattle 

 foods, is shown in the following table : 



MANURIAL CONSTITUENTS IN 1000 PARTS OF ORDINARY 

 FOODS. 



