70 THE CREAMERY PATRON'S HANDBOOK. 



Thus we find that the ration should contain of digestible nutrients, 1.20 

 of protein, 9.20 pounds of carbohydrates and .27 of a pound of ether ex- 

 tract or fat. Since the cow is doing light work the larger portion of the 

 nutrients should be provided in the roughage. We therefore use 10 pounds 

 of red clover hay. The table given by Prof. Henry tells us that in 100 

 pounds of hay, there are 6.8 pounds of digestible protein. Dividing this by 

 100 we find .068 of a pound of protein in 1 pound of hay, and multiplying 

 this by 10, the number of pounds to be fed daily, we have .68 of a pound 

 protein. In 100 pounds of the hay there are 35.8 pounds of carbohydrates, 

 in 1 pound .358, and in the 10 pounds 3.58 pounds. Making similar cal- 

 culations with the ether extract in 100 pounds of the hay, we find that in 

 the 10 pounds there is .17 of a pound. We next take the 10 pounds of 

 fodder corn. W^e see by the table that a hundred pounds contains, of pro- 

 tein 2.5; of carbohydrates 34.6, and of fat 1.2; and by a similar calculation 

 we find that in the 10 pounds of fodder corn there are nutrients as follows: 

 protein .25, carbohydrates 3.46, ether extract .12. In making these cal- 

 culations we have also discovered that in dividing the number giving the 

 nutrients in a hundred pounds of any feed by 100, is simply removing the 

 decimal two points to the left, and that it can then be multiplied by the 

 number of pounds to be used in the ration. As an illustration : we choose 

 to use 2 pounds of ground corn meal in the ration. From the table we find 

 that in 100 pounds of corn there are 7.9 pounds of protein or .079 in 1 pound, 

 and .158 in the 2 pounds, and in the same way the other nutrients are found. 

 Not desiring to buy any mill feed unless it is necessary, 2 pounds of barley 

 meal are added to the ration. No attention has been paid to the dry matter 

 in the ration because this point is always adjusted if the suggestions in re- 

 gard to methods of feeding are observed. At first it seems as though for- 

 mulating rations were a complicated matter, but such is really not the case. 

 By a little practice one soon finds it simple and becomes familiar with the 

 composition of all ordinary feed stuffs. Tabulating the data obtained 

 we have the following formula: 



/ Digestible ^ 



Lbs. Pro. C.-H. Fat 



Clover hay 10 .68 3.58 .17 



Fodder Corn 10 .25 3.46 .12 



Corn 2 .16 1.33 .08 



Barley 2 .17 1.31 .04 



1.26 9.68 .41 



This ration provides all the nutrients a little in excess of the cow's 

 needs for a daily yield of 10 pounds of milk, if she is kept quiet, and in com- 

 fortable quarters; but if she were allowed to roam over fields, exposed to 

 extreme cold or raw strong wind or cold rains, she might need nearly all the 

 nutrients in the ration for food of support. 



Now let us suppose that there are a number of cows to be fed and that 

 some are giving 15 pounds of milk daily, others 20 or possibly as high as 



