FOODS — ANIMAL PRODUCTION. 



447 



From the above data tlie followiug- calculation is made of tlie yield 

 of digestible materials: 



Yield of digestible organic snhstance per acre. 



Crop. 



Corn : 



Breck Boston Market. 



Learning ^ . ^ . . 



Hoots : 



Mangels 



Sugar beeta ^ . 



Average of corn . . 

 Average of roots. 



Increase of corn over roots. 



Dry 



organic 

 matter. 



Lbs. 

 3, 7()1.8 

 3, 417. 2 



1, 873. 5 

 1,784.6 



3, 589. 5 

 1, 829. 



Pro- 

 tein. 



Lbs. 



208.2 

 173.0 



1.58. 2 

 161.8 



190.6 

 160.0 



Carboliy- 

 drates. 



Lbs. 



2,510.0 

 2, 519. 



1,631.5 

 1, 489. 5 



2, 515. 

 1,560.5 



Crude 

 fiber. 



Lbs. 

 973.9 

 612.0 



74.7 

 129.6 



793.0 

 102.1 



Fat. 



Lbs. 

 69.7 

 113.2 



91.5 

 6.4 



"The average product of the 2 varieties of corn and the 2 classes of roots shows a 

 diftereiice in dig'estible organic matter in favor of corn amounting to 1,760 lbs. per 

 acre, or 96.2 per cent. The difterence in green sitbstance at time of harvest was 4,785 

 lbs., or 25.7 per cent. In dry matter the difference amounted to 3,326 lbs., or 151.4 

 per cent. In other word.s, as much digestible organic matter was produced on 1 

 acre when grown in corn as was obtained from 1.91 acres of mangels, or 2.05 acres 

 of sugar beets." 



Similar work at the Maine Station (Annual Report for 1891, p. 41; 

 E. S. R., 4, p. oGS) and at the Ontario Agricultural College (Bulletin 

 86; E. S. li., 4 p. 700) is cited. "In these trials the showing is much 

 less favorable to corn than in our experiments, yet . . . neither of 

 these stations is located in what may be regarded as the corn belt." 



The estimated cost of growing the corn and roots, rating labor of man 

 at 12i cts., of man and horse at 17i cts., and of man and double team at 

 25 cts., per hour, and including the cost of fertilizers but not the rent 

 of the land, is $.jG.07 per acre for roots and $21.12 for the corn. " While 

 these figures for an acre of corn maybe regarded as entirely too high, 

 it is believed that they are ftiirly comparable with those given for an 

 acre of roots." The cost given by other stations for raising roots 

 ranges all the way from !|37.30 to $60.50 per acre. 



Feeding trial. — Two lots of 5 cows each were fed during 3 periods of 

 12 days each, with a preliminary period of 10 days. In the first period 

 both lots received the same ration of roots, silage, corn fodder, and 

 grain. In the second period lot 1 had roots and lot 2 silage, the amount 

 corresponding in both cases to the amount of dry matter given in the 

 first period. In the third i)eriod both lots again had the same ration, of 

 silage, corn fodder, and grain. The grain consisted at all times of a 

 mixture of 54.5 parts of corn meal, 27,3 parts of wheat bran, and 18.2 

 parts of linseed meal. About 20 lbs. of silage or 35 lbs. of roots 

 (mixture of mangel -wurzels and sugar beets) Avere fed daily per cow. 

 Tlie silage " was not of prime quality, owing to the development of too 

 much acid." 



