9 2 A GRICUL TURE. [cH. 



cumstances and conditions which influence the body 

 are variable. More non-nitrogenous matter is used in 

 cold weather than when it is warm, and if there be 

 much exercise taken by the animal, the demand for 

 nitrogenous matter is increased in proportion. It is, 

 however, a demand which must be satisfied before the 

 animal can either make growth, or add any fat to its 

 , body. 



194. Our only true foundation for determining^ the 

 feeding power of any food, is by the evidence obtained 

 by experimental trial. The following table shows the 

 increase in the live weight of the animal, obtained from 

 the several varieties of food named. 



Increase of 

 live weight. 



1 50 Ibs. Swedes consumed in the field . . . gave Ib. 



100 



12 



Swedes fed in field with shed to run under 

 Good clover hay . . . . 



Beans 



Pease -..- 



Oats 



Barley 



Linseed cake 



Linseed cake and pease in equal proportion 

 Linseed cake and beans 



6 



5 or 6 

 4l 

 34 



195. A distinction must be drawn between an 

 increase in the live weight and an increase 

 in flesh. The general growth in the body neces- 

 sitates a development of the digestive organs, and 

 other parts of the body constituting the offal, as well 

 as an increase of flesh, bone, and fat. The former 

 must be looked upon as necessary machinery, and the 

 latter as the product obtained. 



In Sheep, 14 Ibs. of live weight usually consists of 5 Ibs. offal 



and 9 Ibs. meat. 

 In Cattle, 14 Ibs. of live weight usually consists of 6 Ibs. offal 



and 8 Ibs. meat. 



It has been already stated (194) that, under certain 

 circumstances, 150 Ibs. swedes produced i Ib. increase 

 in live weight; therefore, 2,100 Ibs. swedes would be 



