330 FARM AND SCHOOL PROBLEMS. 



Fats serve the same purpose as carbohydrates in animal nutrition; 

 But fat produces 2.25 times as much energy as carbohydrates 

 when they are burned in equal amounts. 



3. Find the combined per cent of digestible nutrients of carbo- 

 hydrates and fat in corn. 



4. How many pounds of these two digestible nutrients are there in 

 500 pounds of corn? 



For the solution of problems to find the amount of digestible 

 nutrients, see Henry's Feeds and Feeding. 



The substances that are found in the bodies of animals are 

 very closely related in chemical composition to the plants from 

 which they came. 



Balanced Rations. 



A ration is the amount of feed required for an animal for 

 one day. 



A balanced ration is a ration containing the digestive 

 nutrients, protein, carbohydrates and fat in the proper ratio for 

 supplying the requirements of the animal for a certain purpose. 



A young animal must have a well balanced ration for normal 

 growth and development. 



There may be various reasons for lack of proper gains in 

 animal growth, although food be supplied in sufficient quantities. 

 It may be deficient in ash or protein or carbohydrates and be un- 

 suited to the production of growth. 



In accepting certain standards for balanced rations, it is 

 necessary to mix feeds according to a fixed nutritive ratio. 



When there is not enough protein in a ration to form the 

 proper nutritive ratio with carbohydrates and fat, the ration 

 is said to be too wide. When there is too much protein for the 

 amount of carbohydrates and fat, the ration is said to be too 

 narrow. 



Protein from different sources will have different effects. 

 Protein as found in meat, blood, casein, or eggs, has been pre- 

 pared in the animal body and is completely utilized in producing 

 growth in other animal bodies. Corn is deficient in ash and pro- 

 tein and unsuited to the production of maximum growth. The 

 ash and protein is only partly utilized. 



