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25 > Image 25 of Annual report. 1921

Part of Kentucky Agricultural Experiment Station

Kentucky Agricultural Experiment Station 25 The results of these trials indicate that the chief source of trouble from the use of stale buttermilk is lack of sanitation and that with care and cleanliness of utensils in which the buttermilk is handled or fed, stale buttermilk does not give bad results in pig feeding. Hogging Down Corn and Soybeans. Hogs made ther largest daily gains and the most profit per acre of corn when they were permitted to hog down the corn and allowed freer access to tankage as a supplementary feed. The next most economical method was that in which the corn and soybeans- were grown together and hogged down. This method, how~ ever, did not give quite as large daily gains as where soybeans were hogged down, supplemented with two to three per cent of the live weight of the pigs in corn, hand fed, which method was fourth in point of economy. \lVhile the hogging down of. corn alone was more profitable than the hogging down of soy- beans supplemented with a limited or a full feed of corn, the . daily gains were not as large. The method of hogging down: soybeans supplemented by corn, self fed, proved to be a losingi proposition, due largely to the relatively high price of corn to pork during the years in which this experiment was in pro~ gress. A Horse Breeding. During the year attention was given to` (1) a study of horse semen in which germ cells were active in contrast with semen in which the germ cells were sluggish or _ . inactive. The difference in the hydrogen ion concentration of _ the normal semen and the abnormal semen was found and the e 1esult published in the December, 1921, Journal of the Ameri- i p can Veterinary Medical Association under the titlie, "Thef Hydrogen Ion Concentration of Horse Semen." (2) A study' L was made of the {life of the spermatozoa in the organs of the ; mare. Four mares donated by the Patchen \\'ilkes Stock Farms - were used for the purpose. It was found that the sperm cells 2 of the stallion have a greater length of life in the uterus of mares than they have when kept in the laboratory.