I«2 



Journal of Agricultural Research 



Vol. X, No. 4 



Table III. — Records of reprodtiction and milk secretion — Continued. 



o No milk. 



Table III illustrates certain principles very clearly. It shows that it 

 was impossible to make the wheat-grain and wheat-straw ration com- 

 plete by additions of salts whether they were inorganic or organic in 

 character. Single additions also were a failure and even disturbed in 

 some instances the breeding potency. These records make it clear that 

 an acid condition was not the only disturbing factor of an all-wheat 

 ration, but that there was some other factor at work, resident in the 

 grain. The substitution of the com grain for the wheat grain made the 

 ration physiologically perfect where, in addition to the straw, certain 

 salt additions were made. The calves produced by the mothers on this 

 latter ration were normal and the milk secretion good. The history of 

 No. 636 is particularly instructive in this connection. As seen in Table 

 II, on a corn-grain and wheat-straw ration her calf was dead and she 

 secreted but 11.9 pounds of milk daily. On a corn-grain plus wheat- 

 straw plus organic-salt mixture (Table III) the calf was born strong, 

 lived, grew up, and was finally sold. On this ration the average daily 

 milk secretion reached 26.6 pounds. Again, on a wheat-grain plus wheat- 

 straw plus organic-salt mixture (Table III) a dead calf was produced by 

 the same cow and little or no milk secreted. 



In addition to the records of the effect of additions of a salt there are 

 shown records of No. 637 and 641, again illustrating the effect of adding 

 com stover to the wheat grain. In the case of one individual. No. 641, 

 a strong calf resulted, while this same cow on the wheat plus wheat-straw 

 plus magnesium-citrate ration produced a dead calf. In the case of the 

 other cow. No. 637, the corn stover did not completely overcome the 

 toxicity of the wheat grain, although it accomplished much more than 

 mere additions of a salt to a wheat-grain and wheat-straw ration could, 

 as evidenced by the greater length of intrauterine life. Illustrations of 

 cows and calves under the influence of these rations are given in Plate 



