CHAPTER IX. 



RELATIOX OF FOOD TO MANURE. 



The quantity of manure produced by oxen, sheep, and pigs, under given 

 diets — Proportion of the ash constituents and nitrogen of the food 

 which appears in the liquid and solid excrements — Composition of 

 the excrements of sheep and oxen — The relative manure value of 

 various cattle foods— The value of the ash constituents and nitrogen 

 of animal manure as compared with the same materials in artificial 

 manures. 



The quantity of dry manure produced for a given 

 quantity of food consumed has been already mentioned. 

 The figures in the table on p. 102 show that, with the diets 

 assumed, the sheep produces for the same weight of dry 

 food nearly twice as much manure as the pig, while the 

 ox produces even more manure than the sheep. This dif- 

 ference is due to the less digestible character of the food 

 supplied to the sheep and ox. The quantity of manure 

 produced during the same time, and for the same body 

 weight, is however very similar with the three animals, 

 the greater consumption of food by the pig counter- 

 balancing its lower rate of manure production. 



The only constituents of food which are of importance 

 as ingredients of manure are the nitrogenous substances, 

 and the ash constituents. If the live weight of an animal 

 remains unchanged, and there is no production of milk, 

 the quantity of nitrogen and ash constituents voided in 



