l82 EXEMKNTARY TREATISE) ON STOCK FEEDS AND FEEDING 



TABLE V '.(Continued.) 

 ESTIMATED ENERGY VALUE OF i POUND OF GAIN IN WEIGHT 



Age 

 months 



lyive 

 weight 

 pounds 



Digestible 

 protein 

 pounds 



Energy 

 value 



therms 



Growing cattle and growing sheep 



6 



12 



18 

 24 



30 



1.50 

 1-75 



2.00 

 2.50 



2-75 

 3.00 



Fattening cattle i Ib. gain live weight 



3-5 



One Ib. milk production requirement 



0.05 



0-3 



How to Compute the Requirement. Let us compute a ration 

 for a dairy cow weighing 875 Ibs., producing 25 Ibs. of milk 

 daily. 



Referring to Table V we find the maintenance requirements 

 for cows weighing 750 Ibs. and 1,000 Ibs. are: 



750 Ib. cow i ,000 Ib. cow 



Digestible protein, pounds 0.40 0.50 



Energy, therms 4.95 6.00 



The difference between 875 and 1,000 is the same as the dif- 

 ference between 750 and 875. Therefore the maintenance re- 

 quirement for a cow weighing 875 Ibs. is: 



Digestible protein 0.45 pound 



Energy 5-475 therms 



For the production of 25 Ibs. of milk we would need accord- 

 ing to Table V: 



Digestible protein (25 X 0.05) = 1.25 pounds 



Energy (25 X 0.3 ) = 7-5 therms 



The total requirement then is: 



Digestible Energy 



protein value 



pounds therms 



Maintenance 0.45 5-475 



Milk production 1.25 7.500 



Total requirement =1.70 12.975 



