158 ILLINOIS STATE DAIRYMEN'S ASSOCIATION 



bohydrate and fat in a ton of any feed are taken and enough of 

 the protein added to them to give the same per cent of protein 

 that ground corn has, these nutrients would be worth the same 

 price per pound as the nutrients in ground corn. Whatever 

 the feed costs per ton above this amount must be charged against 

 the remaining protein. Example: There are 1576 pounds of 

 digestible nutrients in a ton of ground corn (8.5 per cent pro- 

 tein) and if corn is worth $20.00 per ton, each pound of nutri- 

 ents is worth 1. 14 cents. O.P. Linseed meal contains 1039 

 pounds of nutrients (8.5 per cent protein), equal to as much in 

 corn, and 516 pounds extra, or excess protein. The 1039 pounds 

 at 1. 14 cents per pound equals $11.83. If oil meal costs $30 per 

 ton, the cost of the 516 pounds of excess protein would be :he 

 difference between $11.83 an( l $3 aoo > or $18.17. This equals 

 3.$ cents per pound for the protein. Other tilings being equal, 

 the feed supplying the excess protein at the lowest cost per pound 

 should be selected. The effect of the feed on the cow and the 

 milk should be considered. The relative values of the feeds 

 given in the table were worked out on this basis. 



How To Use the Table. 



If wheat bran and cotton-seed meal are to be compared 

 proceed as follows: Find the local price of corn in the upper 

 two lines, say 56 cents per bushel or $20.00 per ton. Far- 

 ther clown the same column on the line headed cotton-seed 

 and the figures $13.11 which is the value of nutrients in a ton of 

 bran minus the 149 pounds of excess protein shown in the last 

 column to the right. Subtract the $13.11 from the local price 

 of bran, say $25, and the result is $11.89 which is the cost of the 

 149 pounds of excess protein. Divide the $11.89 by J 49 anc ^ the 

 result shows that the cost of protein is 8 cents per pound. Far- 

 ther clown the same column on the line headed cotton-seed 

 meal, are the figures $11.84, which is the value of the cotton- 

 seed meal minus the excess protein. Subtract this $11.84 from 

 the local price of cotton-seed meal, say $35, and the result is 

 $23.16, or the cost of 672 pounds of excess protein. $23.16 di- 



