Computing Rations for Farm Animals 



1579 



and total nutriment in the several foods in the suggested ration are 

 as follows: 



The nutritive ratio of the above ration may be calculated by sub- 

 tracting the protein from the total nutriment and dividing the remainder, 

 which is the carbohydrates plus the fat multiplied by 2j, by the protein: 



17.625 — 2.578 = 15.047 



15.047 -7- 2.578 = 5.8 

 Therefore the nutritive ratio is 1:5.8, which is correct, since it was said 

 on page 16 that the ration must be not wider than 1 : 5.9. 



By another method, the fat may be multiplied by 2 \, the fiber and 

 nitrogen-free extract added, and the total divided by the protein: 



• 747 X2j= 1. 681 



1. 681 -f- 10.146 -f- 3.220 = 15.047 



15.047 -7- 2.578 = 5.8 

 The result, 1:5.8 for the nutritive ratio, is of course exactly the same. 



A shorter method is by Table 3 , which has been compiled from Table 1 

 in order to shorten the work of computing rations. The total nutriment 

 has been calculated for different amounts of the several foods. Instead 

 of computing the ration in detail, as above, it may be computed with 

 the aid of Table 3 as follows : 



TABLE 3. Digestible Composition of Stated Amounts of Common Foods 



(Compiled from Table 1) 



