1920] DAIRY FARMING DAIRYING. 777 



Rouge, Que. (E. S. R., 41, p. 572), the author reports that the average feed 

 consumed by heifers until calving time (about 20 months) was 092 lbs. whole 

 milk, 5,993 lbs. skim milk, 780 lbs. grain, 2,902 lbs. hay, 177 lbs. green feed, 

 4,320 lbs. roots, and 5,000 lbs. silage, together with 97 days of pasture. 



Dairy cow feeding experiments, L. Fostkk and J. R. Meeks {New Mexico 

 Sta. Bui. 122 (1920), pp. J,0, fig. i).— The first part of this bulletin deals with 

 the comparison between alfalfa hay alone and alfalfa hay plus corn silage as 

 feeds for dairy cows. The results of a previously reported experiment are re- 

 printed from Bulletin 98 (E. S. K., 33, p. 872), and two additional experiments 

 are reported. These were conducted from January to May in 1910 and 1917. 

 Two groups of cows were used in each, and these were fetl during four 25-day 

 periods by the reversal method. 



" Taking the average of the two experiments, the addition of a 30-lb. ration 

 of corn silage to an alfalfa hay and grain ration made a saving of 30 per cent 

 of the hay, but it did not reduce the cost of the ration. It re<iuired three tons 

 of silage to replace one ton of alfalfa hay. Considering the hay at $10 per ton 

 and the silage at $3.50 per ton, there was little difference in the cost of the two 

 rations ; but the milk product of the alfalfa ration was 4 per cent greater than 

 that of the silage, and the butter 2.4 per cent greater." 



The second part of the bulletin deals with the comparison between beet pulp 

 and corn silage for dairy cows and is a detailed report of an experiment pre- 

 viously noted from the 1915 report of the station (E. S. R., 34, p. 774). 



Growth of green crops on arable land for dairy cows, R. G. White (In 

 Rpts. on Expts. 1917-1919, Univ. Col. No. M'ales, Bangor, Dept. Agr., pp. 

 J/l-ol). — Preliminary experiments to determine a soiling system suited to con- 

 ditions in North Wales are reported. " By sowing suitable mixtures of oats 

 and peas or vetches, a succession of very useful green food to supplement the 

 failing pastures, and to take the place of purchased cake, etc., can be secured 

 In July and August." 



Cottonseed cake for dairy cows, R. H. Williams and W. S. Cunningham 

 (Arizona Sta. Rpt. 1918, pp. 330-333) .—Three lots of 3 or 4 cows each were fed 

 by the reversal method during three 28-day periods on the following rations : 

 (1) Alfalfa hay 15 lbs., corn silage 40 lbs.; (2) alfalfa hay 22 lbs., cottonseed 

 cake 4 lbs. ; and (3) alfalfa hay 11 lbs., silage 40 lbs., and cottonseed cake 3 lbs. 

 Ration 2 produced 459.7 lbs. of milk and 20.8 lbs. of fat more than ration 1, 

 and 590.8 lbs. of milk and 20.2 lbs. of fat more than ration 3. It is concluded 

 that it was the alfalfa hay rather than the cottonseed cake of ration 2 which 

 increased the production. 



The use of poppy seed cake as a cattle food and its effect on yield of 

 milk and composition of the butter fat, H. E. Axnett and Jatindra NatH 

 Sen (./our. Agr. Sri. [England], 9 (1919), No. J,, pj,. J,16-429, figs. 7).— Feeding 

 experiments with one cow and two Murrai buffaloes in India indicated that 

 the substitution of poppy seed oil cake for mustard seed cake is without influ- 

 ence on the yield of milk, the percentage of fat, the relative proportions of 

 volatile and nonvolatile fatty acids in the fat (Reichert-Meissl and Polenske 

 numbers), the saponification value of the fat, or tlie butyro-refractometer read- 

 ings. The reputed effects of poppy seed cake in producing drowsiness and 

 watery milk were not observed. The cow received 2 lbs., and each buffalo 3 

 lbs., of the poppy seed cake per day for 44 days. 



Jerseys as economical producers of milk, H. Corner (Jour. Brit. Dairy 

 Farmers' Assoc. 32 (1920), pp. 18-29, figs. 2). — The author cites milk production 

 records of British Jerseys, and states that he has made computations indicating 

 high yields per unit of feed consumed. 



