DAIRY FARMING DAIRYING. 



i91 



One lot received 1 kg. of concentrated feed in addition to pasture during the months 

 of June to August, 1902, while the other lot received no grain. A majority of the 

 cows had calved prior to the month of January. The results showed no particular 

 effect of the grain feeding. 



In another experiment conducted during 1903 with two groups of 10 cows each, 

 spring-calving cows were mainly included. One lot was fed 1 kg. cotton-seed meal 

 in addition to a very small allowance of grain fed to both lots. In this case a direcl 

 gain was obtained from the grain feeding, since 370 kg. of concentrated feed appar- 

 ently produced an increase of 492 kg. of milk. It was also noticed that feeding main 

 fended to maintain better the milk flow and to improve the body condition of the 

 cows. 



Feeding trials with mountain hay. — The trials were planned to determine whether 

 mountain hay exerts any special effect on the fat content cf cows' milk. The trials 

 were conducted with 5 cows for 7 periods of 7 to 14 days' duration, and failed to show 

 that mountain hay fed with concentrated feed and either roots or wet distillers' 

 grains, possesses any beneficial influence on the fat content of the milk. Changes in 

 the system of feeding appeared to lower the per cent of fat in the milk for a short 

 period. — p. w. woll. 



On the relation of milk yield and feed consumption, G. Holtsmark (Arch. Math. 

 ocj Naiurvidensk., 26 (1904), No. 2, pp. 17). — The author tabulated the average produc- 

 tion and feed consumption of 846 Norwegian dairy herds during the year 1902, using 

 the data < >1 >tained by the cattle control associations of that country. In the calculation 

 of the amount of feed consumed the various feeds were referred to their supposed 

 equivalents of "food units," according to the common practice of these control asso- 

 ciations (see E. S. R., 13, p. 177). 



In the study of the relation between the milk yield "and feed consumption, the 

 formula for a curve showing the number of food units required for the production of 

 different annual milk yields was obtained by means of a logarithmetic function. The 

 results obtained agree very closely with the yields actually found in the different 

 herds. The following table gives some of the main results of the calculations: 



Relation of mill- yield and feed consumption. 



The largest yield of milk per 100 food units, 1,743 kg., was obtained by feeding 

 2,402 food units per year. The figures given in the last column of the table show 

 that the increase in production grows smaller the heavier the cows are fed. The 

 results of the computations are used by the author for studying the system of feeding 

 adopted in different parts of the country and the relations between the prices of milk 

 and feeds and the intensity of the feeding. — p. w. woll. 



White carrots as a fodder for dairy cattle, J. Mahon (Queensland Dept. Agr. 

 Rpt. 1903-4, pp. 32, 33). — In an experiment here reported, 4 cows were kept on 

 natural pasture for a period of 8 days, after which they were fed a daily allowance 

 of about 35 lbs. of carrots per head for a second period of 8 days, following which 



