ON MANURES. 



II25 



of soluble ash contain no less than thirty-seven parts of real potash, 

 or a quantity which is equal to fifty-four parts of pure carbonate 

 of potash. Straw-litter manure also contains a large amount of 

 soluble silica, both in the soluble and in the insoluble ash. This 

 is practically lacking in moss-litter manure. In the soluble ash this 

 silica is united principally with potash. Fresh farmyard or stable 

 manure, made with straw as litter, contains much soluble silicate 

 of potash, which is especially valuable in the growth of plants. 



Chemical Composition of Animal Manures. 



The following Table shows the comparative value of ordinary 

 farmyard manure composed of animal excrements and litter ; and 

 the excreta of various domestic animals, of both the solid and 

 the liquid dejections. The constituents are each given in one 

 ton of each description of manure. 



SELECTED CONSTITUENTS IN ONE TON OF ANIAIAL DUNG, 

 AND OF FARMYARD MANURE IN A FRESH CONDITION. 





Nitrogen. 



Potash. 



Lime. 



Phosphoric 

 Acid. 





lb. 



lb. 



lb. 



lb. 





10 



12 



39 



6 



Horse Droppings .... 



17 



13 



10 



9 





9 



8 



10 



3 



Pig Droppings 



iC 



4 



35 



4 



Sheep Droppings .... 



20 



14 



33 



13 



Hen Droppings 



43 



19 



58 



39 



SELECTED CONSTITUENTS IN ONE TON OF ANIMAL URINE 



IN A FRESH CONDITION. 





Nitrogen. 



Potash. 



Lime. 



Phosphoric 

 Acid. 





lb. 



lb. 



lb. 



lb. 





42 

 1 1 



33 

 31 

 4 



17 

 3 











8 



r 



29 





38 



44 



13 



I 



