19191 



DAIRY FARMIISTG — DAIRYING. 



181 



milk yield and the average feed records (excluding pasturage) of each produc- 

 tion group in each association published. The " total " digestible nutrients 

 (sum of digestible protein, digestible carbohydrate, and 2.25 times the digesti- 

 ble fats) in a feed is used as the chief basis of comparison. The average data 

 of Henry and Morrison are employed for the standard feeding stuffs, vphile for 

 proprietary feeds whose formulas were not known the published analyses of the 

 New York State Experiment Station were utilized, coefficients of digestibility 

 being selected " to correspond to the ingredient found to be present in largest 

 proportion." The combined results for all three associations are tabulated 

 below : 



Annval feed consumption of cows grouped according to milk production. 



Attention is called to the uniform amounts of dry roughage consumed and 

 to the increases in grain and silage consumption with increased yield. The 

 uniformity in the ratio of grain fed to milk produced is held to show a tendency 

 to apportion grain without regard to the relative efficiency of individual cows. 



A comparison is instituted between the records of these cows and those of a 

 herd at the University of Wisconsin (E. S. R., 20, p. 674). A separate sum- 

 mary is also given of the feeding records of 93 of the cows that were listed as 

 being two years old. Four cows selected at random are compared to show indi- 

 vidual differences in economy of production. 



Soiling crops for milk production, L. S. Gillette, A. C. McCandlish, and 

 H. H. KiLDEE {loica Sta. Bui. 187 {1919), pp. 29-59).— This is a general discus- 

 sion of soiling crops based upon the experience of the Iowa Station. The topics 

 treated include advantages and disadvantages of the soiling system, silage v. 

 soiling, production and feeding of soiling crops, crops suitable for soiling pur- 

 poses, and outlines of suitable systems. " The average of seven years' work at 

 this station indicates that 42 cows may be kept during the summer months on 

 20 acres of pasture and 12 acres of soiling." A bibliography of 35 titles is in- 

 cluded. 



The possibility of increasing milk and butter-fat production by the admin- 

 istration of di-ug's, A. C. McCandlish {Jour. Dairy Sci., 1 {1918), No. 6. pp. 

 Ji7/>-Jf86). — A preliminary test with a single cow showed an average decrease in 

 milk flow of 3.5 lbs. per day following the administration of a bolus containing 

 aloes, calomel, and nux vomica, a decrease of 2.1 lbs. following injections with 

 pituitrin, a lesser decrease following alcohol feeding, and practically no 

 change accompanying combined injections of pilocarpin and physostigmin 

 (eserin). 



A more extensive series of experiments using the same cow and two others 

 was then carried out. Each experimental period lasted two days and was 

 preceded and followed by check periods of four or five days. The following 



