565 



The quantities of food in all the experiments of both series vrero 

 liberal, as appears from the figures for potential energy. In series 

 the estimated energy of the digestible nutrients per 1,000 pounds live 

 weight per day ranged from 27,815 to 30,075 Calories. In series D the 

 range was from 36,450 to 39,690 Calories. These numbers exceed the 

 29,700 Calories which Wolff's standard calls for by from 22.7 to 33.6 per 

 cent. The digestible protein is large both in absolute quantity and in 

 relation to the other nutrients. The amounts per 1,000 pounds live 

 weight ranged in series C from 2.3 to 3.22 pounds, and in series D from 

 2.96 to 4.06 pounds. These quantities are from 8 per cent smaller to 

 62.4 per cent larger than the 2.5 pounds of Wolff's standard. The 

 nutritive ratios range from 1 : 5 to 1 : 3.8. The widest is narrower than 

 1 : 5.4 of Wolff's standard. 



In series C the cows yielded hardly more milk with the largest ration 

 than with the smaller ones. This the authors think was not strange, 

 since the cows were very near the limit of their capacity for milk pro- 

 duction with the smallest ration. The change in live weight was 

 inconsiderable. The estimated financial gain was a little the largest 

 with the largest proi)ortion of nitrogen {i. e. with the largest amount 

 of oil cake), which increased the value of the manure. 



In series D the milk yield increased somewhat with the increase of 

 total nutrients and nitrogen. The increase in live weight was slightly 

 larger with the smallest ration than with either of the others. The 

 financial showing was a little the best with the largest ration, but here, 

 as previously, the estimate is made more favorable by the value of 

 the manure than it would have been if the milk product alone had been 

 taken into account. Indeed the value of the manure was a very large 

 fiictor of the gain. 



(2) Effect of one-sided increase of non-nitrogenous food. — To test the 

 effects of large rations with wide nutritive ratios, three series of experi- 

 ments, E, F, and G, were made. They were made up in the same 

 manner as those on the effects of narrow rations (series C and D) 

 except that in adding oil meal and barley meal to the basal rations the 

 barley meal was increased and the oil meal diminished to make the 

 wider rations. 



Series E. — Conducted by Herr Luedecke in Hoetensleben. Eight 

 cows averaging 1,100 pounds live Aveight. Basal rations per head per 

 day in pounds, potato residue 112.2, beet diffusion residue 33, hay 5.5, 

 straw 8.8, i)alm nut cake 2.2; peanut meal and barley meal added to this 

 in quantities as stated. 

 17450— No. 8 5 



