CALCULATING RATIONS FOB ANIMAL8 211 



Digestible Nutrients. 

 ■«■ 

 Dry Carbo- 



Matter. Protein. K»t. hydrates. 



10 pounds shelled corn... 8.9 .80 .46 6.59 



10 pounds clover hay 8.5 .76 .20 3.84 



5 pounds oats 4.5 .46 .21 2.36 



Compounded ration 21.9 2.02 * .87 12.79 



Required ration 22.0 1.80 .60 11.00 



Nutritive ratio in compounded ration, 1 to 7.3; required 

 ratio, 1 to 6.9. 



These rations agree well enough, so let us try 

 another, say one for a cow giving milk. Table VIII 

 shows that a cow giving milk, for every thousand 

 pounds of weight requires per day 28 pounds of dry 

 matter containing of digestible nutrients, 2.5 pounds 

 protein, .5 pound fat, and 12 pounds carbohydrate. 

 But suppose our cow weighs only 800 pounds. \Ye 

 should then take only .8 of the ration or 22.4 pounds 

 dr\ matter, 2 pounds protein, .4 pound of fat, and 9.6 

 pounds carbohydrai b. We have, to feed our cow, corn 

 ensilage, cowpea hay, hay of mixed grasses, and wheat 

 bran. As ensilage i> a bulky food containing much 

 water, let us start by taking 30 pounds of it, and as 

 1> ran is a rich dry food, we should take much less of it, 

 say 5 pounds. The amounts of these two foods together 

 us about 10 pounds of dry matter, leaving about 

 12 pounds to be supplied by the two hays. As ensilage 

 contains hut little protein let us take the larger amount 

 of pea hay which [* rich in protein. We will take say 



8 pounds of the pea hay and .*» pounds of the mixed hay. 



Now referring to Table \ 11 we find that the amounts 

 of food selected give the following figures : 



