182 AGRICULTURE 



it decays slowly, and therefore its effects 

 are more lasting. 



On the other hand, mar.ura produced by 

 horses fed, as they are, on drier food, con- 

 tains less water, and is not so thoroughly 

 disintegrated ; the result being that it is 

 more porous, and being better permeated 

 by air it ferments more rapidly, and is of 

 the character to which the term 'hot' 

 is applied. It is^ therefore, only manure 

 furnished by stables that is utilized by 

 gardeners as material for imparting heat 

 to a forcing frame. But just because the 

 manure of horses ferments so readily there is 

 a greater risk of loss of nitrogen during the 

 time of storage. That nitrogen is more 

 abundant in the air of a stable than of a 

 cowhouse is evident from the characteristic 

 smell of ammonia which is associated with 

 ill-ventilated stables. 



The manure furnished by piggeries rather 

 resembles that produced by bovine animals, 

 though a good deal depends upon the char- 

 acter of the food supplied to the pigs, which, 

 if sloppy in character, produces a cold, low- 

 class manure ; whereas if the pigs are get- 

 ting large quantities of such a substance as 

 pea meal, the resultant manure may be 

 comparatively rich. 



