146 PROFITABLE DAIRYING 



TABLE II 



Total digestible substances in 100 pounds 



Total 



Feeding Stuffs Dry Carbohy- Ether Nutritive 



Roughage: Matter Protein drates Extract Ratio 



Corn stover 59.5 1.7 32.4 0.7 1:20.0 



Red clover hay 84.7 6.8 35.8 1.7 1: 5.8 



Timothy hay 86.8 2.8 43.4 1.4 1 : 16.7 



Oat straw 90.8 1.2 38.6 0.8 1:33.7 



Concentrates : 



Corn or corn meal 89.4 7.8 66.7 4.3 1: 9.8 



Oats 89.0 9.2 47.3 4.2 1: 6.2 



Wheat bran 88.1 12.2 39.2 2.7 1:3.7 



Oil meal, O. P 90.8 29.3 32.7 7.0 1:1.7 



The value of a feed is dependent upon digest- 

 ible nutrients it contains. In the above, attention 

 is called to the total protein content of wheat 

 bran, which is 15.4 pounds per 100 pounds of the 

 feed. In the second table it will be learned that 

 of this only 12.2 pounds are digestible, the 

 amount of protein available for the animal. 



Oat straw contains, as is shown in the first 

 table, 4 per cent of protein. In the second table 

 100 pounds of oat straw contains only 1.2 pounds 

 of digestible protein. The value of knowing the 

 amount of digestible nutrients the feed contains 

 cannot be overestimated. 



It should be noted that certain feeds, such as 

 oat straw, are so deficient in nourishment that it 

 would be necessary for a cow to eat two or 

 three hundred pounds of these feeds in order 

 to furnish her sufficient nourishment to enable 

 her to secrete twenty to twenty-four pounds of 



