124 Feeds and Feeding. 



Arranging these results, we have : 

 First trial ration for an 860-lh. cow producing 20 lbs. milk daily. 



Feeding stuffs 



Total 

 dry matter 



Digestible 

 protein 



Net energy 

 value 



Corn forage, 12 lbs. 

 Clover hay, 6 lbs — 

 Corn meal, 5 lbs. . _ _ 

 Wheat bran, 2 lbs. _ 



Lbs. 

 6.94 

 5.08 

 4.46 

 1.76 



Lbs.i 

 0.26 

 0.32 

 0.34 

 0.20 



Therms 

 3.66 

 2.08 

 4.44 

 0.96 



First trial ration 



Standard requirement 



18.24 



1.12 

 1.45 



11.14 

 11.60 



Excess or deficit 



-0.33 



-00.46 



This trial ration shows a deficiency in both digestible protein 

 and energy value. To improve it w^e deduct 1 lb. of corn meal 

 and add 2 lbs. of gluten feed, which is the richest in digestible 

 protein of the available feeds. We then have : 



This ration agrees closely with the standard. Thus, accord- 

 ing to the Armsby standard, a satisfactory ration for a dairy cow 

 weighing 850 lbs. and producing 20 lbs. of 4 per ct. milk daily 

 may be composed of corn forage, 12 lbs. ; clover hay, 6 lbs. ; corn 

 meal, 4 lbs. ; wheat bran, 2 lbs. ; and gluten feed, 2 lbs. 



VII. The Scandinavian Feed Unit System. 



A system of feed equivalents, based mainly on the extensive ex- 

 periments with milch cows and swine by Fjord and his successors 

 at the Copenhagen Station, has been adopted in Denmark and 



