678 



EXPERIMENT STATION RECORD. 



[Vol. 37 



The following table is a summary of the average results, which show the 

 influence of one feed upon the digestibility of another feed : 



Coefficients of digestibility of feeds, directly and indirectly determined. 



Ration. 



Protein. 



Ether ^^''^l^^'" 

 extract. ^Ji^^ 



Crude 

 fiber. 



Per cent, i Per cent. Per cent. 



Middlings— direct 



Middling — indirect 



Com — direct 



Com— indirect 



Barley — direct 



Barley— indirect 



Com — direct 



Com — indirect 



Middlings and com — direct 



Middlings and com— indirect ' 

 Middling and com — indirect » 



Barley and com — direct 



Barley and com— indirect ' 



Barley and com— Indirect » 



79.3 

 78.3 

 75.1 

 73.0 

 54.0 

 60.2 

 74.0 

 81.4 

 77.3 

 7&0 

 76.6 

 66.5 

 63.2 

 69.9 



S2.3 

 89.3 

 71.7 

 81.3 

 33.0 

 68.9 

 64.9 

 68.7 

 83.5 

 78.8 

 88.1 

 67.8 

 54.0 

 80.7 



82.2 

 77.2 

 9Z7 

 8S1.9 

 81.2 

 86.2 

 91.5 

 96.6 

 86.0 

 88.1 

 83.8 

 8S.9 

 86.3 

 91 3 



Percent. 



22.8 



6.1 



30.8 



—2.2 



14.1 



3.7 



3&8 



15.6 



12.1 



24.8 



-«l7 



15.0 



20.4 



6.6 



' Calculated from direct determinations of coefficients of individual fe<?ds. 

 * Calculated from indirect determinations of oocfflcients of Individual feeds. 



Data are also tabulated showing the thoroughness with which each pig 

 digested its feeds, from which it is concluded that " under conditions that are 

 practically identical throughout the same experiment, the coefficients of digesti- 

 bility of the nutrients of a number of different rations show signiGcantly higher 

 values for some pigs than for others. However, the differences in the coeffi- 

 cients of digestibility of the nutrients of the same feeds by the different pigs 

 are probably too small to be considered of much, If any, practical or economic 

 Importance." 



The digestibility of some Arkansas feeds for hogs, J. B. Rather (Ar- 

 kansas Sta. Bui. ISS (1917), pp. 16, fig. 1). — The results of digestion experi- 

 ments on hugs are reported, including analyses of the feeds and a description of 

 the digestion crate used in the experiments. The following table gives the 

 coefficients of digestibility as determined : 



Coefficients of digestibility of various feeding stuffs. 



Pork production on irrigated lands in western Nebraska, J. A. Holden 

 (Ncbraskei Sta. Bui. 159 (1917), pp. 4-Sl, figs. S). — Results of grazing experi- 

 ments with hogs at the Scottsbluff experiment farm from 1912 to 1916. inclusive, 

 are reported. Results secured from 1012 to 1915, inclusive, have been noted 

 from another source (E. S. R., 36, p. 767). 



