312 



DOMESTIC ANIMALS, DAIRYING, ETC. 



Gluten feed $27 



Cotton-seed meal 30 



Old-process linseed meal 33 



The supply of coarse feed on the farm is sufficient to furnish 

 each animal per day 32 pounds of silage and 8 pounds of clover 

 hay; the cows average 1,000 pounds each and may be expected to 

 produce about 24 pounds of milk per day. The first step is to com- 

 pute, in precisely the same way as in the previous example, the esti- 

 mated requirements of these cows per day as follows: 



The amounts of silage and clover hay available will furnish, ac- 

 cording to the table, the following amounts of dry matter, digestible 

 protein, and energy value: 



The question now is what feeding stuffs is it most economical 

 to buy (or to refrain from selling if in stock) to complete the ration. 

 The first step in deciding this question is to compare the various 

 feeds as sources of energy and see which one furnishes a unit of 

 energy value at the lowest price. This computation gives the fol- 

 lowing results : 



Evidently, if it were simply a question of supplying energy to 

 the animals, the farmer should use corn meal, since that supplies a 

 unit of energy at a much lower price than any of the other feeding 



