72 PRINCIPLES OF FEEDING FARM ANIMALS 
We now have the composition of the ration given as follows: 
Results of First Trial 
5 : Digestibl 
eee kee ache ucates 
pounds pounds ee 
20 pounds hay................00005 16.94 84 8.98 
4 pounds wheat bran............. 3.52 48 1.90 
3 pounds corn meal............... 2.66 24 2.28 
TO tele ace ces neere arden qucinee swaranny 23.12 1.56 13.16 
Wolff-Lehmann standard .......... 29.0 2.5 14.1 
DYGH GIES. eskalesi.d Aneounns caaoun s peaate 5.88 94 .94 
There is, therefore, a deficit both in dry matter and digestible 
components in the ration; and it is evident that we have to supply a 
high-protein feed in order to keep the relation between the two classes 
of nutrients near to the requirements of the standard. Linseed meal 
serves this purpose very well, and we may add 2 pounds of this to the 
ration. 
Results of Second Trial 
- es — 
matier | Protein | “Grates i” 
and fat 
Ration as above............2-4.. 23.12 1.56 13.16 
2 pounds oil meal............... 1.80 .60 95 
SEGA aie dc cthwualevaiadosiaeeilepecsinnnas 24,92 2.16 14.11 6.5 
Wolff-Lehmann standard ........ 29.0 2.5 14,1 5.6 
Deficitewcncx2y secede eae 4.08 36 .01* 
*Excess. 
The ration is still below the standard in dry matter and digestible 
protein, especially the former, but may be sufficiently close to the 
standard for all practical purposes. If we had to feed a poorer 
grade of roughage than the hay given, more dry matter would have 
to be supplied in proportion to the digestible matter, and the deficit 
of dry matter would have been avoided without increasing at the 
same time the digestible components of the ration. The Wolff-Leh- 
mann standards were framed to conform especially to ordinary 
European feeding practices, which generally include some straw or 
low-grade roughage in the rations fed to livestock. 
