142 



AGRICULTURE. 



The nutritive ratio, then, is i to the quotient obtained 

 by dividing the sum of 10. 10 + (2.4 x .67)= 11.708 by 

 1.94 = 6. Therefore, the nutritive ratio is i : 6. 



Comparing this with the standard, we find 

 that the ratio is that given for a horse doing 

 Jieavy work, while the nutritive ratio given for a 

 horse doing light work is given as i : 7. A horse 

 at light work requires less protein than one do- 

 ing heavy work ; hence, this ratio is too narrow. 

 Then, as another trial, let five pounds of oat 

 straw be substituted for five pounds of the clover 

 hay. 



Second Trial. Required to find the number of pounds 

 of dry matter, protein, carbohydrates, and ether extract, 

 respectively, in 10 pounds of clover hay and 5 pounds of 

 oat straw. 



(a] In 100 pounds of clover hay there are, according 

 to the table, 84.7 pounds of dry matter, 6.8 pounds of 

 protein, 35.8 pounds of carbohydrates, and 1.7 pounds of 

 ether extract. 



Then in 10 pounds of clover hay there are: 



10 x ^,,i- = 8.47 pounds of dry matter; 



ioX ,', K r = -68 pounds of protein; 



10 x "^ 3.58 pounds of carbohydrates; and 



iox-' w j- .17 pounds of ether extract. 



