56 FEEDING WITH SUGAR BEETS, SUGAR, ETC. 



consumption during rest we obtain the protein requisite for 

 work produced. In such calculations it is well to consider the 

 digestible protein; in fact, upon general principles we may admit 

 that the working powers of an animal depend upon its digestive 

 activity. 



Again using the above formula, we have: 



Kn=PX 1,742,500. 



Consequently if we have a ration consisting of known fodders 

 it is possible to determine the work it can produce. In a few 

 words, the calculation consists in determining the raw protein of 

 the ration and the coefficient of digestibility. 



Work done = Crude protein X Coeff. of digestibility X 1.742.- 

 500. If the work is known in advance the protein necessary 

 may be determined by a very simple calculation. 



Upon general principles it must be admitted that an animal 

 will not develop muscular force unless its muscles are in good 

 condition, which means health. The amount of albumin de- 

 posited in the organs and in the circulation must be sufficient to 

 supply the demands for the production of work. Under special 

 conditions the mechanical energy developed may be increased 

 by using a very concentrated ration. 



^ e wor ^ m g f cows and oxen on farms is not practiced in 

 this country as in Europe, consequently the subject has for us 

 only a secondary importance. The ration of an animal doing 

 work must necessarily differ from one being stall fed, and 

 the appetite is greater owing to the effort of nature to restore 

 tissue consumed during work. Instead of the standard given 

 for growing cattle, we can increase the quantity of beets \ Ib. 

 per diem and slightly decrease the cotton seed cake. The pro- 

 portion for each would then be 35 per cent, of total dry matter 

 furnished by beets, 17 per cent, hay, 13 per cent, wheat, 18 per 

 cent, cotton-seed cake, and 18 per cent, malt sprouts. For an- 

 imals 12 to 18 months old and consuming 18.5 Ibs. dry matter 

 per diem we should have a ration as follows: Beets 46 

 Ibs., clover hay 3.7 Ibs., wheat straw 2.7 Ibs., cotton seed meal 

 3.7 Ibs., malt sprouts 3.7 Ibs. Under these circumstances there 

 would follow an increase of weight of about y 1 ^ or 1.8 Ibs. per 



