98 



FEEDS AND FEEDING, ABRIDGED 



To illustrate the use of the table there are computed below the re- 

 quirements of a 1,100-lb. cow producing 25 lbs. of 4 per ct. milk daily : 



Digestible nutrients required daily by the above cow 



Crude 

 protein 



Carbo- 

 hydrates 



Fat 



For maintenance 



For 25 lbs. of 4 per ct. milk 



Lbs. 

 0.77 

 1.35 



Lbs. 



7.70 

 G.00 



Lbs. 

 0.11 

 0.52 



Total 



2.12 



13.70 



0.63 



In the above there is first set down the maintenance allowance for 

 the 1,000-lb. cow, increased by one-tenth because this cow weighs 100 

 lbs. more than the standard; this is 0.77 lb. crude protein, 7.7 lbs. 

 carbohydrates, and 0.11 lb. fat, all digestible. The previous table shows 

 the daily nutrient allowance for each pound of 4 per ct. milk to be 

 0.054 lb. crude protein, 0.24 lb. carbohydrates, and 0.021 lb. fat, all 

 digestible. Since this cow is yielding 25 lbs. of milk daily, the fore- 

 going numbers multiplied by 25 are placed in the second line of the 

 table. Adding these nutrients to those for maintenance, we have 

 2.12 lbs. of protein, 13.7 lbs. of carbohydrates, and 0.63 lb. of fat as 

 the quantity of digestible nutrients required daily to nourish a 1,100-lb. 

 cow properly when giving 25 lbs. of 4 per ct. milk daily. 



The Woll-Humphrey standard. — At the Wisconsin Station "Woll and 

 Humphrey prepared convenient tables showing the feed requirements 

 of cows of different weights and producing various amounts of butter 

 fat per day. To simplify the computation of rations, in these tables 

 the requirements are stated in terms of dry matter, digestible crude 



