692 



Manure produced under cover. Manure produced in open yard. 



1st year Potatoes, n | tons per acre ist year Potatoes, 7 tons 12 c\vt. per acre 



2nd,, Wheat grain, 45 bush. 2nd,, Wheat grain, 42 bush. 



Straw, 215 ston, Straw, 150 stones 



A great part of this difference is due to the loss of urine that takes 

 place in the open yard. The fermentative action in a manure is 

 somewhat similar to that which takes place in the soil during nitri- 

 fication. The decomposition will greatly depend on the amount of 

 nitrogen it contains, on the temperature, amount of moisture, and 

 access of air. The temperature in the centre of the heap should 

 not be allowed to rise above i5odeg. Fahr., or otherwise it get s 

 what is called fire-fang. 



The temperature should be regulated by the addition of liquid 

 manure or \vater. The heap must not be drenched, or there will be 

 a large loss from drainage. If the fermentation is too rapid it will 

 generally be found to give off a strong odor of ammonia, which is 

 a loss. The heap should be trodden down to moderate the 

 fermentation. A great deal of the value of the manure depends on 

 the manner in which it is made. By want of proper care, the 

 manure by drainage and other causes may be of very little value. 

 Of course the value of farmyard, manure will mostly depend on the 

 food supplied to the animals. 



This will be better explained by giving Lawes and Gilbert's 

 theoretical estimation of the money value of farmyard manure 

 derived from various foods, which is given in the following tables : 

 AYKR.U'.K COMPOSITION OF CATTLE FOODS FREED FROM WATER. 



Linseed 

 Linseed cake 

 Decorticated < 

 Palm-nut cake... 

 I 'n.i.-i .unrated cc 

 Cocoanut cake ... 

 Rape cake 



Peas 



Beans 



Lentils 



i (seeds) 



Indian corn 



Malt 

 Barley 



Oats 



teal 



i 1 tan; 



Per cent. 



