WHAT CONSTITUTES AN ADEQUATE RATION 



117 



this will require a ratio of close to 4. Let us call it 4, for general 

 purposes, and figure out a ration on the basis of this ratio. We 

 have available corn grain, flour middlings, and 60 percent protein 

 meatmeal tankage. The first thing to do after determining the 

 ratio is to look up the analyses for these three feeds, marking down 

 the protein and carbohydrate equivalents in separate columns, 

 thus: 



A practical man knows about how these materials should be fed 

 in feeding young pigs. Let us go on the basis of using 100 pounds 

 of corn, mixing with it or feeding along with it whatever we need 

 of the two different feeds wheat-flour middlings and meatmeal 

 tankage to build the whole ration up, or to balance the corn. We 

 will decide off-hand that we want to feed 50 pounds of middlings 

 with 100 pounds of corn ; so that is definite. It will be necessary, 

 then, to feed considerable tankage to bring the ratio right. Let us 

 now figure the ratio of the mixture composed of 100 pounds of corn 

 and 50 pounds of wheat flour middlings. 



Pounds in A Howance 



The ratio secured, therefore, is 6.08, got by dividing 115.6 by 

 19. This is not rich enough in protein. It will be necessary to add 

 some high-protein tankage to the mixture. Let us add 10 pounds 

 and see how it figures : 



Pounds in Allowance 



This gives a ratio of 4.75, which is secured by dividing 118.8 by 

 25. The mixture is still not rich enough in protein, hence we shall 

 have to add some more tankage. Let us, therefore, add 10 pounds 

 more of tankage to the new mixture, which we have made up, so that 

 instead of having 100 pounds of corn, 50 pounds of middlings and 

 10 pounds" of tankage, we shall have 10 pounds more of tankage 

 added thereto. The figures for this follow:" 



