128 



PRINCIPLES OF FEEDING FARM ANIMALS 



This ration is low in protein but about right in energy. 

 Consequenth^ a pound of linseed meal is substituted for a 

 pound of the ground corn, as the Unseed meal contains con- 

 siderably more protein and about the same amount of energy 

 as corn. The ration is as follows : 



This ration satisfactorily fulfills the Armsby standard. 



Van Norman ^ has proposed a modification of the Armsby 

 standard for dairy cows by taking into account the quality 

 as well as the quantity of the milk. For every variation of 

 0.1 per cent from a standard fat content of 4 per cent, the 

 amount of cUgestible protein is increased or decreased, as 

 the case may be, 0.0005 lb., and the energy, 0.008 therm. 



1 Peiin. Exp. Sta. Bui. 114. 



