482 Bulletin 268. 



The fat, then, was not appreciably influenced by the character of 

 the rations. The results show that three pounds of grain and three 

 pounds of dry matter in loots have nearly the same feeding value under 

 the conditions of the experiment. Groups B and D were fed richer 

 rations than Groups A and C. In either case, however, grain and dry 

 matter in roots were found to possess a similar feeding value, whether 

 the nutritive ratio was 1:5 or 1:9. 



The experiments also show that three-fourths of a pound of cotton- 

 seed-meal was equivalent to one pound of the mixed grains. This 

 ratio appeared to hold true whether a heavy or light root ration was 

 fed. Groups B and D therefor received three-fourths of a pound of 

 cottonseed-meal more than the equivalent three pounds of grain, hence 

 the increased production of these groups. 



Results at the Cornell Station. The results of the experiments at the 

 Cornell Station seem to agree with the results of the Danish experiment 

 and perhaps go a little further, in that they seem to justify the con- 

 clusion that one pound of dry matter in mangels is equal to one pound 

 of dry matter in grain, at least when one-half of the grain ration is 

 replaced by mangels. Two series of comparisons are possible from the 

 results of these experiments: (a) a comparison of rations I and III, 

 in which silage was fed as a succulent food in both cases; and (b) a 

 comparison of rations II and III, in which mangels were fed as a succulent 

 food with a full grain ration, and silage was fed as a succulent food 

 with one-half the usual amount of grain replaced by mangels. 



(a) Comparison of dry matter in mangels with dry matter in grain 

 with rations I and III. To aid in the consideration of the first series. 

 Table XXV has been prepared from Tables X, XVIII, XIX, and XX. 

 Sixteen comparisons were found possible. A comparison was made 

 every time a cow was fed ration I during one feeding period and ration 

 III during another feeding period. The resulting gain or loss in fat 

 was noted in each case, and also whether more or less dry matter was 

 fed in the other foods when the mangels were substituted for part of the 

 grain. The entire amounts of dry matter in the mangels fed and in the 

 grain replaced were added and the totals of the butter fat gained or lost 

 were computed. The amount of dry matter in the grain replaced in 

 each case was found by subtracting the amount of dry matter in the 

 grain in ration III from the amount of dry matter in the grain in ration 

 I. This showed that 2638.0 pounds of dry matter in grain was replaced 

 by 2710.3 pounds of dry matter in mangels, with a loss of 4.03 pounds 

 of fat. This would seem to indicate that one pound of dry matter in 

 mangels is not quite equal to one pound of dry matter in grain; but when 



