202 



Horsedung, 13.07 61.64 



Goats diiDg, 32.09 42.44 



Sheepsdung, 32.09 42.08 



Dried nigbtsoil, 33.14 41.44 



Dried ox blood, 34.24 41.03 



Dried urine, 35.01 39.03 



The reader will see how steadily the proportion of gluten is increased 

 with the increased proportion of nitrogen in the manure. Prof. Johnston 

 states that "the amount of nitrogen contained in each of the organic ma- 

 nures is a certain test of its value." Liebig says that animal manures act 

 only by the formation of ammonia. 



Mr. James Haywood has ascertained the proportion of nitrogen con- 

 tained in a ton of the various commonly employed manures. (See 

 Farmers' Magazine, Vol. 20, Page 188.) 



nitrogen. 



1 ton farm-yard manure contains of nitrogen, 11 lbs. 



1 ton nigbtsoil contains of " 39.8 



1 ton of rape dust contains " 70.0 



1 ton of fresh bones contains " 120.0 



1 ton of dry blood contains " 366.0 



I ton of guano contains " 1 82.S 



1 ton of sulphate of ammonia, " 470.0 



1 ton of soot contains " 41.6 



1 ton of nitrate of soda contains " 364.0 



1 ton of pearl ashes contains " 299.0 



One hundred parts of wheat grown on a soil manured with cowdung, 

 which contains only a small quantity of nitrogen, aflbrded only 11.96 

 parts of gluten, and 64.34 of starch, whilst the same quantity raised on 

 a soil manured with urine, yielded 35 per cent, of gluten. 



All animal manures emit carbonic acid so long as nitrogen exists in 

 them. In every stage of their putrefaction, an escape of ammonia may 

 be induced by moistening them with a potash lye ; the ammonia being 

 apparent to the senses by a peculiar smell, and a dense white vapor. 



Every farmer should fully understand the value and importance of 

 nitroffen as a fertiliser of the soil, and the good effect on the wheat 

 crop of those manures in which it abounds. 



We may understand the properties of a certain manure, and yet not 



