Organic Manures 



For strong lands preference should be given to 

 slightly matured manure, but for light lands it 

 should be well ripened. 



In fixing the price of manure and regarding its 

 value as an improvement, the value of its fertilising 

 matters is estimated as follows. The price of the 

 nitrogen is rather less than that of the nitrogen in 

 nitrate ; that of the potash is equal to the potash in 

 chlorure of potash ; and that of the phosphoric acid 

 is equal to that of slags. 



The quantity of farmyard manure varies 

 according to the feeding conditions, the kinds of 

 animals, the litter, and the housing. In prolonged 

 (permanent) housing, however, the production can be 

 calculated as 9 cubic tons for a horse, 13 1 for a cow, 

 J for a sheep, and i^ for a pig ; taking the average 

 weight of a cubic ton as about 10 cwt. or a little 

 more. 



Urine. 



Urine is liquid animal excrement, and is pro- 

 duced in great quantities on a farm. Both its 

 quality and quantity vary according to a number 

 of circumstances. It always contains in solution 

 disassimilable nitrogenous products and soluble 

 mineral salts derived from digested food and waste 

 of tissue. In it is found the greater part of the 

 potash and nitrogen contained in the food. In 

 the case of herbivorous animals the urine is alkaline 

 and does not therefore contain phosphates, whilst 

 in that of swine they are found in a considerable 

 quantity. The quality of urine differs strongly 

 according to the breed of animal. Thus that of 



102 



