Unidentified Dietary Factors in Dairy Cattle Nutrition. II. Further Evidence of an Unidentified Factor(s) in Grain Needed to Balance Roughage for Milk Production

In the preceding paper (12), digestion trial data were presented on four milking cows receiving a ration of hay alone and again after 15 lb. of the hay had been replaced with 6 lb. of corn and 9 lb. of peanut hulls. Three of four cows increased in milk production against the tide of declining lactation on the hay-corn-peanut hulls ration, in spite of the fact that there was a marked decrease in the consumption of T.D.N., calculated net-energy and starch equivalent and a significant increase in the amount of crude fiber in the dry matter and in ballast.