42 FARM ARITHMETIC. 



80. In a ton of such grass how many pounds of each 

 substance ? 



81. Clover hay from the mow contains 6.2 per cent of 

 ash, 12.3 per cent protein, 24.8 per cent of crude fiber, 

 38.1 per cent of nitrogen-free extract, and 3.3 per cent 

 of fat. What is the percentage of water? How many 

 pounds of water in a ton of such hay ? 



82. In a ton of corn there are 592 pounds of water, 

 ash, protein, crude fiber, and fat. What is the percentage 

 of nitrogen-free extract? 



4^ Acres 

 Timothy Hay 



INCREASING THE FARM PROTEIN SUPPLY. 

 The two fields will produce the same amount of protein. 



83. When corn produces 40 bushels per acre, how 

 many pounds of nitrogen-free extract are contained 

 therein ? 



84. The percentage of protein in cowpea hay is 16.6 ; 

 in timothy hay 5.9. What is the difference in number of 

 pounds of protein produced when cowpeas yield 2.1 tons 

 and timothy 1.3 tons per acre? 



Digestible nutrients in feeding stuff. Only a part 

 of what is eaten is digested and assimilated. The per- 

 centage of a given food that is digested is known as its 

 coefficient of digestibility. To know approximately the 

 amount of a given ration that is digestible, it is necessary 

 to make use of the coefficient of digestibility for each 

 constituent in it. These coefficients have been de- 

 termined by experiment. 



