CHAPTEE IX. 



EELATION OP POOD TO MANURE. 



Quantity of the Manure How calculated Character of manure from 

 horses, cattle, sheep, and pigs. The Litter Its absorbent power and 

 composition. Composition of Manure Proportion of the ash con- 

 stituents and nitrogen of the food which appears in the liquid and 

 solid excrements Composition of the excrements of sheep, oxen 

 and cows. Manure value of Foods The quantity of nitrogen and 

 ash constituents contained in foo:ls Their value as compared with 

 the same materials in artificial manures Economic use of manure. 



Quantity of the Manure. This is very variable, 

 depending largely on the amount of indigestible matter 

 in the diet. Thus the quantity of manure credited to 

 the fattening ox and sheep in the table on p. 124, would 

 be greatly increased if a portion of the roots in their diet 

 was replaced by straw- chaff. The manure credited to 

 the pig would be much less if, instead of barley meal, it 

 had received potatos and skim milk. 



The quantity of dry matter in the solid excrement of 

 an animal may be calculated from the digestion co-efficient 

 of the diet. The quantity of dry matter in the urine is, 

 according to Wolff, nearly 6 por cent, of the dry food 

 Consumed. 



The mixed excrements of pigs and cattle are far 

 more watery than those of sheep and horses, a larger 

 proportion of litter has therefore to be used for the first- 

 named animals. Pigs and cattle thus yield a bulky, 



