FEEDING OP FARM STOCK. 



199 



Next, adding together the amounts of dry matter and 

 digestible nutrients in the four feeds, we find the total in 

 the ration, which may then be compared with the standard : 



The standards given in Table IV are for 1,000 pounds of 

 live weight, but in the case assumed, the cow weighs only 

 900 pounds, so there must be a corresponding reduction of 

 the amounts in the standard. The reduction is calculated 

 just as the feeds were above ; if a 1,000-pound cow requires 

 24 pounds of dry matter, a 900-pound cow will require 24-*- 

 1,000 X 900 = 21.6 pounds. The amount of protein, carbo- 

 hydrates and fat for the 900-pound cow are calculated in 

 exactly the same way from the standard. 



In comparing the ration assumed with the standard, we 

 find it deficient in all the nutrients except the fat, and 

 especially low in protein. In order to correct this we will 

 add one pound of cottonseed meal to the mixture and see 

 how it affects it. Using Table III just as we did for the 

 other feeds, we find that the one pound of cottonseed meal 

 contains : 



91.7-^100 Xl=.91 pounds dry matter. 

 39.9-r-100Xl=.40 pounds digestible protein. 

 16.9^-100 Xl=.17 pounds digestible carbohydrates. 

 10.4-5-100 Xl=.10 pounds digestible fat. 



Again adding together the amounts of dry matter and 

 digestible nutrients in the feeds used, we find our ration to 

 be as follows : 



