SMALL HOLDINGS 129 



more nitrogen and more potash than that 

 produced by horses or pigs, while the manure 

 of the horse contains more nitrogen and 

 phosphoric acid — which is the dominant con- 

 stituent of all phosphatic manures — than the 

 pig, but less potash. Again, the urine or 

 liquid excrement of the sheep contains more 

 nitrogen than that of either the cow, the 

 horse, or the pig, but the horse takes next 

 position, the urine of both horses and sheep 

 being rich in this element, while the urine 

 of the pig is essentially poor. The liquid man- 

 ure produced, however, by both horse and pig 

 is rich in phosphoric acid, of which fertiliser 

 the urine of the cow and the sheep contains 

 a sufficient quantity to make it worth salvage; 

 indeed, the urine of all classes of stock should 

 be saved with great care and distributed 

 on the land at the earliest moment, or, if this 

 is impossible, mixed with a sufficient quantity 

 of water to prevent the loss of ammonia. 

 The urine of each class of stock, the pig 

 excepted, is rich in potash. 



The fertilising value of dung depends almost 

 entirely upon the character of the food con- 

 sumed by the stock. Thus the dung pro- 

 duced by fatting stock kept in boxes is much 

 richer tlian that produced by cows, while 



