1020 EXPERIMENT STATION RECORD. 



produced 4 per cent more milk and total solids, Imt no more butter fat than AvLon 

 silage was fed. One hundred pounds of dry matter in the experimental fodder was ' 

 apparently of equal value in eitlicr ration for milk and total solids; that from car- 

 rots, however, produced 4 per cent less butter fat. These differences are so small 

 that no stress can safely lie laid npon them, and apparently in these tests the dry 

 matter of corn silage and carrots had essentially e(|ual feeding values. 



•'Since the dry matter of carrots is practicallj' all digestible and that of corn 

 silage but two-thirds digestible, it follows that 100 lbs. of digestible dry matter in 

 the corn silage gave larger returns in these tests than 100 lbs. of tbe same in the 

 carrots," 



Beets vs. carrots. — Two cows were alternated on beets and carrots fed 

 ad Uhitum for 4 periods. Silage was fed in addition to tbe roots in the 

 last 3 periods. Tlie beets did not last quite tlirongb the fourth period. 



" (1) In spite of 10 per cent less total dry matter eaten in the form of carrots, the 

 production of milk, total solids, and butter fat increased 4 per cent. 



"(2) In spite of 34 per cent increase in the total dry matter eaten in the form of 

 heets, but 3 jier cent more milk, 4 per cent more total solids, and 1 per cent more 

 butter fat were produced. 



"(3) A carrot ration with 18 per cent less dry matter than a beet ration and a 

 third less dry matter in the form of roots iiroduced equally good returns. ■ 



"(4) There was no change in the quality of the milk. 



" (5) One hundred pounds of dry matter in the carrot ration yielded about a fifth 

 greater product than the beet ration, while 100 lbs. of dry matter in the can'ots 

 yielded about two-lifths greater product than did the same amount of dry matter in 

 the beets. 



"(6) The dry matter of both beets and carrots is jiractically all digestible; hence, 

 in these tests the carrots far surpassed the beets in feeding value, either on the basis 

 of dry matter or of digestil>le matter." 



Corn-oil cal'e vs. corn meal and hran. — These materials were compared 

 with 6 cows in 5 periods of 4 weeks each, with the following results: 



"(1) Seven per cent more milk and milk ingredients were given when an equal 

 weight of dry matter in the shape of corn-oil cake was substituted for ecj[ual parts of 

 corn meal and bran. 



"(2) Nine per cent less milk and milk ingredients were given when an equal 

 weight of dry matter in the shape of equal parts corn meal and bran was substituted 

 for corn-oil cake. 



"(3) Eight per cent more milk and milk ingredients were given when an equal 

 weight of dry matter in the shape of corn-oil cake was substituted for equal jiarts of 

 corn meal and bran. 



"(4) There was no change in the (juality of the milk as a result of the change in 

 ration. 



"(5) One hundred pounds of dry matter in tbe shape of corn-oil cake, in the place 

 of an equal amount of dry matter in the form of eijual weights of corn meal and bran, 

 increased the yield of milk and milk ingredients one-twelfth." 



Atlas gluten meal vs. corn meal and bran. — Atlas gluten meal was 

 compared with a mixture of equal parts of corn meal and bran on 

 cows for 20 weeks with the following results: 



"(1) Three per cent increase in the total dry matter eaten in the form of Atlas 

 gluten meal produced 16 per cent more milk, 18 per cent more total solids, and 20 per 

 cent more butter fat. 



"(2) Fourper cent decrease in the total dry matter eaten in the form of corn meal and 

 bran produced 11 per cent less milk and total solids, and 15 per cent less butter fat. 



