THIRTY-EIGHTH ANNUAL CONVENTION 



163 



giving that amount of milk requires 2.3 pounds of protein and 

 14.78 pounds of carbohydrate and fat. But she weighs 200 

 pounds more than that, therefore, to the above should be added 

 .14 pounds of protein and 1.44 pounds of carbohydrate and fat, 

 which gives 2.44 pounds protein and 16.22 pounds of carbohy- 

 drate and fat. 



Suppose a ration is to be made from clover hay, ground 

 corn and wheat bran. If no other roughage is fed, a good cow 

 will consume about 20 pounds of clover hay daily. The table of 

 digestible nutrients on page 171 shows that 20 pounds of clover 

 hay contains 1.24 pounds protein and 7.88 pounds of carbohy- 

 drate and fat. Add to this 8 pounds of ground corn. The table 

 shows that it contains .536 pounds protein and 5.768 pounds car- 

 bohydrate. Bringing these together gives the following : 



Protein Carbo. and fat 



Required amount 2.44 16.22 



20 pounds clover hay (Mammoth) 1.240 7.880 



8 pounds ground corn 536 5.768 



Total 1.776 13.648 



This does not give sufficient nutrients and if more ground 

 corn should be added, the result would be too much carbohydrate 

 and fat, or not enough protein. Bran contains more protein 

 and less carbohydrate and fat than corn ; therefore 6 pounds, or 

 three-fourths as much bran as ground corn, should be added. 

 This gives the following: 



Protein 



Required amount 2.44 



20 pounds clover hay (Mammoth) 1.240 



8 pounds ground corn 536 



6 pounds wheat bran 714 



Total 2.490 



Carbo. and fat 

 16.22 



7.880 



5.768. 



2.856 



16.104 



This ration contains one pound of protein to 6.4 pounds of 

 carbohydrate and fat which is about the right proportion for 

 cows giving this amount of milk. The same ration can be ad- 



