1917] 



ANIMAL PRODUCTION. 



869 



0.66 lb. The addition of molasses to a ration of corn and tankage did not 

 reduce the cost or increase the efficiency of the mixture. Due in part to the 

 interruption of hog cholera lot X did not make representative gains. The per- 

 centages of grain eaten by the self-feeder lots were as follows : Lot 1, corn 76, 

 middlings 15, and tankage 9; lot 3, corn 82.6, tankage 13.5, and molasses 3.9; 

 and lot X, corn 77.5, middlings 15, and tankage 7.5. 



The advantages and disadvantages of self-feeders for hogs are discussed. 

 They are recommended for use in feeding " brood sows nursing pigs, after 

 the youngsters are 15 days old ; pigs that have been weaned, provided they do 

 not have access to a green forage crop ; shotes that are being fattened either 

 in dry lot, or forage crop, after they reach 100 lbs. live weight; and for 

 fattening any animal in a dry lot where rapidity of gains is an advantage. 

 The self-feeder should not be used for animals intended for breeding purposes 

 as such animals will put on too much flesh and develop a tendency toward 

 irregularity in their breeding propensities. Herd boars and sows that are 

 being maintained preparatory for breeding should not have access to a self- 

 feeder, for the practice wUl be expensive and a distinctive disadvantage unless 

 the animals are out of condition and it is desired to put them in better flesh." 



Swine husbandry, G. R. Eastwood (Ohio Sta. Bui. 303 (Wlfi), pp. 102, 103). — 

 In an experiment in hogging down rye at the Miami County experiment farm, 

 28 pigs, averaging 51.8 lbs., were grazed on two acres of a three-acre plat of 

 rye for 38 days. In addition they were fed 0.25 lb. of tankage per head daily. 

 They made a total gain of 459.5 lbs., or an average of 0.432 lb. per head daily, 

 and consumed 5.71 lbs. of tankage per pound of gain. With pork at 8 cts., they 

 made a net return of $15.10 per acre, with no charge for labor. The acre of rye 

 not grazed yielded 13 bu. 



Some of the results of hogging down three three-acre plats of corn in the fall 

 of 1915 are given in the following table : 



Results of tests of hogging down corn. 



Report of the department of poultry husbandry, H. R. Lewis and W. C. 

 Thompson (Neio Jersey Stas. Rpt. 1915, pp. 93-120, pis. 10). — An experiment 

 with White Leghorn pullets to determine the value of sour skim milk as a sup- 

 plement to the regulation New Jersey ration for laying fowls has been pre- 

 viously noted from another source (E. S. R., 35, p. 479). It is stated that the 

 results of the experiment indicate that " egg producers can afford to pay from 

 20 to 45 cts. per 100 lbs. for sour skim milk." 



In an experiment upon the relative feeding value of certain common sources 

 of high protein-carrying feeds from both animal and vegetable sources, a prog- 

 ress report of which has already been noted (E. R. S., 34, p. 176), the birds 

 receiving protein from an animal source, meat scrap, produced in the two years 

 of the experiment a total of 8,501 eggs as compared with 4,710 by the soy-bean 

 meal pen, 4,003 by the gluten feed pen, 2,847 by the linseed meal pen, and 2,995 

 by the cottonseed meal pen. The meat scrap pen laid 5,596 eggs during the first 



