40 AGRICULTURAL EXPERIMENT STATION. [Jan. 



A short discussion of the most important facts presented 

 in the preceding tabular statement may assist in a desirable 

 appreciation of the questions involved. 



During our first year of observation, November, 1885, ta 

 July, 1886, either corn meal and wheat bran or wheat bran 

 alone served as grain feed ; while, during the succeeding 

 years, as a rule, the same weight parts of corn meal, wheat 

 bran and gluten meal were fed. 



The above-stated variations of daily yield of milk refer 

 to the highest and lowest yield in each case, and do not bear 

 a direct relation to any particular diet. 



The valuation of the fodder ingredients is based in this 

 connection on the average of the local market price per ton 

 of each article for the entire period of observation. 



The commercial valuation of the fertilizing constituents 

 contained in each fodder article is based on the following 

 market prices : i. e., nitrogen (pier pound), 17 cents ; phos- 

 phoric acid, 6 cents ; and potassium oxide, 4^ cents. Eighty 

 per cent, of the entire amount of fertilizing constituents 

 contained in the fodder consumed is considered obtainable 

 by proper management, while twenty per cent, is assumed 

 to be sold with the milk. 



Principal Daily Fodder Rations used. 



November, 1885, to July, 1886. 



