EXERCISE 59 (Continued) 



2. Which are the most economical feeds for supplementing alfalfa for 

 dairy cows: Indian corn at $1.80 per 100 pounds, barley $1.25, wheat bran 

 $1.20, wheat middlings $1.35 and corn silage at $2.50 per ton? Give order 

 of preference according to (a) content of total digestible matter, (b) energy 

 values, and (c) feed units. 



Give a practical ration selected from the preceding feeds for a 1200-lb. 

 cow yielding 22 Ibs. of 4 per cent milk, according to Wolff -Lehmann, Armsby, 

 and the feed-unit system. 



104 



