35 



ensilage be fed in place of clear corn ensilage, the grain ratio can 

 be reduced about one-third. 



As the cow approaches the time of calving, the grain ration can 

 be gradually reduced. The cow ought to go dry from 45 to 60 

 days. 



Table X. 



Shoiving the Comparative Commercial Values of the Different Feeds. 



Per Ton. 



Per Ton. 



Wheat bran 



Corn, wheat and barley meals, 

 Oat meal, .... 

 Hominy and cerealine feeds, 

 Oat feed, .... 



Kice meal, .... 

 Wheat middlings, . 

 Brewers' grains, . 

 Malt sprouts, .... 

 Gluten and maize feeds, 

 Atlas meal (feed), 

 O. P linseed meals, 

 N. P. linseed meals, 

 Gluten meal (first grade), . 

 Gluten meal (second grade). 

 Cotton seed meal, . 



$18 00 

 19 00 



17 00 



18 00 

 16 CO 

 21 00 

 21 00 

 21 00 

 23 00 

 28 00 

 28 00 



31 00 



32 50 

 35 00 

 31 00 

 35 00 



$14 00 



15 00 



13 00 



14 00 

 12 50 



16 00 

 16 00 

 16 00 

 18 00 

 22 00 

 22 00 



24 00 



25 00 

 27 00 

 24 00 

 27 00 



The comparative dollars and cents values of the feeds as given 

 in the above table do not express their specific physiological effects 

 in the process of nutrition. The figures are intended to show com- 

 parative and not actual commercial values. They are obtained by 

 figuring the digestible protein, fat and carbohydrates at similar 

 prices per pound. The table shows that when wheat bran sells for 

 ^18 per ton in the market, corn meal should be worth $19, wheat 

 middlings $21, brewers' grains $21, etc. Again, should wheat bran 

 sell for $14, corn meal would be worth $15, middlings $16, etc. 

 The prices of themselves have nothing to do with suitable concen- 

 trated feed combinations, but are to be used as economic guides 

 in purchasing. Thus should corn meal sell at $23 per ton, and 

 gluten feed at $21 per ton, it would not, for economical reasons, 

 be advisable to use grain mixtures containing corn meal. 



IV. FERTILIZING VALUE OF CONCENTRATED FEEDS. 



Aside from their direct feeding effects, all feed stuffs have a 

 distinct fertilizing value. This value depends chiefly on the 

 amount of nitrogen (protein =: nitrogen multiplied by 6.25) they 

 contain, those that are highest in that ingredient being most valu- 

 able. Some feed stuffs, such as cotton and linseed meals, bran, 

 and brewers' grain, contain considerable quantities of phosphoric 

 acid and potash. 



