208 



Analyses of corn fodder and silage. E. H. Farrington, M. S. 

 (pp. 315-310). — These analyses were made iu couuectiou with the 

 above-described feediugexperi meat with heifers. " Duplicate sami)les 

 of silage aud of cora fodder were taken for aualjsis atfiveaud six differ- 

 ent dates respective!}^ ; also, samples of the refused corn fodder and sil- 

 age from the night and morning feed at two different dates." The analy- 

 ses, including a comparison of the albuminoid and non-albuminoid pro- 

 tein in the same, form an interesting feature of the bulletin, and the 

 averages of all the results obtained are given in the following table: 



The corn fodder and silage not eaten, or refused by the animals, was principally the 

 coarser staliis ; a comparison of the water-free substance shows that what was refused 

 contained more water, ash, and crude fiber, but less nitrogen-free extract and crude 

 fat than the original feeding stuff. The per cent of protein is considerably less in the 

 refused than in the original corn fodder, while the silage left uneaten contained nearly 

 the same amount as the original. This suggests that either the nitrogenous constitu- 

 ents are diffused through the silage more evenly than in the corn fodder or that the 

 animals ate the silage without selecting or picking over very much. 



The relation of albuminoids to non-albuminoids is nearly the same in the refused as 

 in the original silage, although quite different iu the two kinds of corn fodder. 



Especial attention is called to the importance of proper sampling and 

 analyses are given of duplicate samples of corn fodder and silage, and 

 the portions of the same rejected by animals, which show the variittions 

 in the composition of samples of different size. 



In the following table the digestible coefficients used are, for corn fod- 

 der and silage, those given by Armsby ;* for clover, hay, and oats, those 

 given by Wolff. For explanation of the figures for potential energy 

 (fuel value), see the bulletin, aud Experiment Station Eecord, Vol. I, 

 p. 268. 



Digestible nutrients and potential energy in 100 pounds of material. 



Pennsylvania Station, Bulletin No. 9. 



