296 STOCK FEEDING 



the necessary nutrients. With roughage we must use a certain 

 amount of concentrates in order to obtain a balanced ration. 

 If we were to use a ration composed of 



Clover 10 Ib. 



Oats 10 Ib. 



Oat Straw . . . 5 Ib. 



and desired to know whether this would prove a suitable ration 

 for a horse doing light work or heavy work, the only thing re- 

 quired would be to find the nutritive ratio as follows : 

 Amount of digestible carbohydrates: 



In 10 Ib. of clover hay - 10 X |^ = 3.58 



100 



In 10 Ib. of oats = 10 X 4.73 



In 5 Ib. of oat straw = 5 X ^- 1.93 



JLUU 



Total amount of carbohydrates = 10.24 

 Digestible fat or ether extract: 



In 10 Ib. of clover hay = 10 X = .17 Ib. 



In 10 Ib. of oats = 10 X = .42 Ib. 



In 5 Ib. of oat straw = 5 X = .04 Ib. 



Total amount = .63 



Amount of digestible protein : 



In 10 Ib. of clover = 10 X = .68 



100 



In 10 Ib. of oats = 10 X .92 



In 5 Ib. of oat straw = 5 X = .06 



Total amount 1.G6 



Hence, 

 10.24 + (2.25 Y .63) 10.24 + 1.418 



66 66~ 



that is, the nutritive ratio is 1 : 7. 



= 7 



