BALANCED RATIONS 293 



nutrients, and how much of each is required. These 

 experiments have been summarized in feeding standards. 



272. Carbohydrate Equivalent of Fat. As we have 

 previously learned, the fats and carbohydrates have the 

 same function, but fat is 2.25 times as effective as carbo- 

 hydrates. One hundred pounds of corn contains 66.7 

 pounds of digestible carbohydrates and 4.3 pounds of diges- 

 tible fat. This is equivalent to 76.4 pounds (66.7 + 4.3 X 

 2.25) of carbohydrates. This is the manner in which the 

 carbohydrate column in Appendix, Table 8, is calculated. 



273. Nutritive Ratio. One hundred pounds of corn 

 contains 7.9 pounds of digestible protein and the equiva- 

 lent of 76.4 pounds of digestible carbohydrates, or it 

 contains one pound of digestible protein for each 9.7 

 pounds of carbohydrates. This is called the nutritive 

 ratio. 



274. Feeding Standards. The commonly accepted 

 feeding standards are given in Appendix, Table 7. As 

 an example, if we look up the standard for horses 

 heavily worked, we will see that the standard ration is 

 26 pounds of dry matter, 17.6 pounds of which is diges- 

 tible, containing 2.5 pounds of protein and 15.1 pounds 

 of carbohydrates. This gives a nutritive ratio of 1:6. 

 If the horse weighs over 1,000 pounds, the ration would 

 be increased proportionately. 



275. Computing Rations. 1 To illustrate how these 

 tables may be used, we will examine a system of feeding 

 cows, which is followed in some diary sections. Timothy 

 hay constitutes the greater part of the coarse fodder. Oats 

 are about the only grain grown. Corn is purchased and 



* Adapted from Cornell Bulletin No. 154, by J. L. Stone 



