THE DIGESTIBILITY OF FEEDINGSTUFFS 



Gl 



a previous experiment. The chemical composition of the 

 feeds used and the feces excreted was as follows : 



Corn . 

 Tankage 

 Feces . 



Dry Sub- 

 stance 



Per cent 



86.38 

 94.56 

 42.22 



Crude 

 Protein 



Per cent 



9.80 

 60.91 

 14.63 



N.-FREE 



Extract 



Per cent 



70.03 



4.30 



14 91 



Crude 

 Fiber 



Per cent 



1.91 

 3.95 

 5.17 



Fat 



Per cent 



3.47 



13.69 



1.77 



During the digestion period, the hog consumed 28 pounds 

 of corn and 7 pounds of tankage and excreted 10.3 pounds of 

 feces. Having these data, one calculates the amount of 

 each nutrient digested as outlined on page 59. 



Having determined the amount of each nutrient digested 

 from the entire ration, the next step is to determine the 

 amount of each nutrient digested from the corn. From a 

 previous test period the coefficients of digestibihty of corn 

 were found to be as follows : dry substance, 88.2 per cent ; 

 crude protein, 78.8 per cent; nitr:gen-free extract, 93.4 

 per cent ; crude fiber, 30.0 per cent ; and fat, 67.0 per cent. 

 Thus, knowing the amount of each nutrient of the corn 



