Corn Bran. 



What has been said regarding oat hulls holds true, in a general 

 way, of corn bran. This by-product bears to corn the same relation 

 that bran and oat hulls bear to wheat and oats. Corn bran possesses a 

 very low feeding value, but unless added to a feed in large quantities it 

 is not objectionable. If, however, large quantities of such material be 

 mixed with some of our more concentrated by-products, the mixture is 

 worth less money than a concentrated by-product not so adulterated. If 

 the corn bran be sold as a by-product pure and simple, then the buyer 

 has no one but himself to blame if the results obtained from feeding such 

 food prove unsatisfactory. The intelligent feeder of live stock will have 

 very little to do with materials which, like this feed, contain less than 9 

 per cent, of iprotein, because most farms produce enough course fodder 

 to supply material of such low grade. It is very true that foods of this 

 general character are sold at a lower price per ton than wheat bran, mid- 

 dlings, gluten meal, and linseed meal, but it should be remembered that 

 a ton of linseed 'meal contains almost four times as much protein as was 

 present in this feed, and when considered from this standpoint, it may 

 be found that that which seems to be cheapest at the time is really the 

 least economical in the end. 



Corn Grown 1902. 



Seven analyses of corn ensilage show an average of 10.52 per cent, 

 of crude protein in the air-dried food. The object of making these sev- 

 eral analyses was to study the chemical changes which take place in the 

 piotein compounds of corn in the silo. This table does not show any 

 column for amide compounds, but I may say that our work, so far as we 

 are able to judge from present results would indicate that a certain 

 amount of the proteid bodies revert to a lower form during the process of 

 fermentation. The figures on the above table would indicate that the 

 corn in the dairy silo in 1902 was of quite constant com,position. 



Analysis of Corn of 1903, Percentage Calculated in Water Free 



Substance. 



The reader will be at once impressed with the fact that whatever be 

 the food value of green corn or corn ensilage, it possesses but a very low 

 percentage of protein. The nine samples analysed in our laboratory 

 show an average of only 9.26 per cent, in water-free substance. Bear- 

 ing in mind what has been said in the introduction regarding the value 

 of protein in the food of our farm animals, it is apparent that the intelli- 

 gent feeder must supplement a ration, consisting largely of green corn or 

 ensilage, with a certain amount of a more nitrogenous food. 



■2 Bull 138. 



