778 



EXPERIMENT STATION KECORD. 



[Vol. 38 



tunities for dairying in Idaho, tlie breeds of dairy cattle, community breeding, 

 selection and management of the herd bull, feeding dairy cattle, silos and silage, 

 other feeding stuffs, calf raising, dairy barns, and milking machines. 



The cost of milk production in lidassachusetts, W. H. Bronson {Mass. Agr. 

 Col. Ext. Serv. Bui. 19 {1918), pp. 20, fig. i).— The records used in estimating 

 the cost of milk production in Massachusetts are for the year ended April 30, 

 1917, and are based upon data obtained from 87 herds distributed in 10 counties 

 in that State. The following results are shown : 



Cost of milk production in Massachusetts tcith different grades of cows. 



Dairying in Uniguay, A. Abklla {Iiiternat. Inst. Agr. [Rome], Intbrnat. 

 Rev. Sci. and Pract. Agr., 7 {1916), No. 5, pp. 620-637). — This is a discussion 

 of the dairy industry in Uruguay, including statistics of dairy cattle, milk con- 

 sumption and price, and imports of dairy products, and an epitome of legislative 

 measures for the sanitary control of milk supply of cities in Uruguay. 



Experiments with artificial one-year pastures, A. V. Davydenko {Rostovo- 

 Nakliichevan. na Donu Selsk. Khoz. Opytn. Sta. Bfiil. 102 {1916), pp. S4). — 

 Experiments carried on in 1911, 1914, and 1915 Vi'ith milch cows on one-year 

 pasture crops are reported. The aim was to investigate the nutritive value 

 and digestibility of rye-cowpeas mixture, oats-cowpeas mixture, and early 

 sorghum, and the influence of the.se mixtures on the production and composition 

 of milk. The green fodder mixtures were fed to one lot of cows each on 

 pasture and in the stable. As a control one lot of cows was fed in the stable 

 and on dry lot a ration of bran and straw, hay, and silage. 



The coefRcieuts of digestibility of the fodder mixtures are given in the 

 following table : 



Coefflcients of digestibility of green fodder mixtures. 



Kind of fodder. 



Ryc-cowpeas mixture . 

 Oats-co^^eas mixture 

 Sorghum 



Dry 

 matter. 



Per cent. 

 70.27 

 6G.76 

 67.02 



Organic 

 matter. 



Per cent. 



73.28 

 69.23 

 70.29 



Protein. 



Per cent. 

 70.24 

 69.23 

 64.43 



Fat. 



Per cent. 

 79.66 

 69. 06 

 78.53 



(Cellulose. 



Per cent. 



74.28 

 58.13 

 68.41 



Nitrojen- 



free 

 extrr.ct. 



Per cent. 

 70.60 

 72.43 

 72.79 



The results obtained in 1915 indicated that the green fodder mixtures had 

 no specific effect on the quantity or quality of the milk. The pasture mixtures 

 furnished the cows sufficient nutritive substances for their needs. On green 

 fodder the cows gave more milk and fat on pasture than in the stable. This 

 increased productivity of the cows on pasture may be explained by a greater 

 amount of nutritive substances obtained in the fodder brought about by an 

 increase of appetite as a result of exercise in the open. The pasture mixtures 



