the right proportions of nutrients, 

 ing results can be deduced : 



MILK PRODUCTION 181 



From these data the follow- 



If the milk were sold at id. per gallon the margin of profit 

 (price realised minus cost of the food) would be as follows : 



At the prices assumed, a yield of i gallon would result in 

 a dead loss of i\d. per day. When other expenses are added, 

 it will probably be found that there would be little or no margin 

 of profit when the yield is less than 2 gallons per head. Of 

 course, if a higher price be put on the milk or a lower price 

 on the hay, the result would be different. Probably no one 

 who paid ^3 $s. per ton for hay would sell milk at 7^. per 

 gallon. If a farmer valued his hay at that price he would be 

 making a profit on that, if not on the milk. 



Some authorities put the cost of winter keep for cows in 

 full milk as low as gd. per head per day; others put it at 

 about is., and some even as high as is. 3^. per head per day. 

 The differences in these estimates are to be attributed mainly 

 to the differences in the prices assumed for the feeding stuffs, 

 rather than to any divergence of opinion regarding the quantity 

 or quality of the rations required. 



Recent investigations l on this subject at sixty-six farms in 



1 " Report on the Cost of Food in the Production of Milk." By James 

 Macintosh, South Eastern Agricultural College, Wye. 



