APPLICATION AND USE OF FORMULA 53 



preceding chapter we find the food for maintenance would be 

 the same, and for 3,000 pounds of milk is as follows: 



Protein. Energy. 



Maintenance, s X 280 = 140 6 x 280 = 1,680 



3,000 pounds milk, 962 x 3,000 = 186 .36 x 3,000 = 1,080 



Total amount needed 326 2,760 



Supplied by hay 90.89 583.63 



Supplied by gilage 61.60 1,159.20 



Total amount supplied 15249 1,742.83 



To be supplied by grain i73-5i 1,017.17 



A ration of a ratio of 1:6 would supply this need. Using 

 the same feeds in slightly different proportions to give the 

 needed balance of i to 6, the following amounts of feed would 

 be required by cows of this production: 



Feed required, with costs. 



1,680 pounds of hay, at $.80 per 100 $13.44 



7,000 pounds of silage, at $.15 per 100 10.50 



450 pounds of corn, at $1.00 per 100 4.50 



300 pounds of dist. grains, at $1.50 per 100 4.50 



300 pounds of bran, at $1.50 per 100 3.15 



300 pounds of oats, at $1.10 per 100 3.30 



Pasture for season, at $5.00 5.00 



Total cost of feed for the year $44-39 



The cost for feed, therefore, would be $30.90 less per year. 

 The cost of labor, buildings, and bedding, and miscellaneous 

 expenses would be the same, while the cost of sires and cows 

 would be decreased only by the initial cost of the latter, which 

 would only decrease the cost per unit cow by a few cents. 

 The cow would cost as much to raise, but if purchased could 

 be obtained for a lower price. The total annual cost, then, 

 to keep cows of this kind would be $97.26. The milk at the 

 same price of $2 per hundred pounds would bring $60, which 

 would make a loss of $37.26 per cow per year. This is what 

 may be expected at present prices of feed and labor from 

 cows that produce no more than the average cow of the United 

 States, when a dairyman attempts to produce milk of good 

 grade, in good barns, using full grain rations, and practicing 

 year-round feeding. 



