306 PRODUCTIVE FEEDING OF FARM ANIMALS 



pigs fed in a dry lot. When the fat hogs are removed from the 

 field, brood sows and pigs may be turned in ; they will clean up and 

 make good use of what is left. Hogs running at large in a field 

 or pasture will be put in prime condition for market if they are fat- 

 tened in a pen for a period of three or four months by being fed all 

 the corn they will eat, with plenty of pure water to drink. According 

 to Burkett, 16 a 5- to 10-acre field of good corn will carry 50 to 75 

 hogs from the shoat to the finished period. The total quantity of 

 pork produced from a given acreage, when hogged down, will be 

 greater than when ear corn or snapped corn is fed in pens. 



Mineral Mixtures for Swine. — In addition to roughage and 

 grain feed, pigs should have access to mineral salts, charcoal, sulfur, 

 etc., preferably placed in a self-feeder. This is beneficial in keeping 

 animals free from worms and in a healthy, thrifty condition. Pigs 

 greatly relish a mixture of mineral salts and take only a moderate 

 amount, as much as apparently is necessary in connection with the 

 ration that they are receiving. The following mixture is recom- 

 mended: Three bushels powdered charcoal, 2 quarts air-slaked 

 lime, 1 bushel hard-wood ashes, 2 pounds sulfur, and 8 pounds 

 common salt. 



These ingredients are thoroughly mixed and placed in a self- 

 feeder or a covered trough (Fig. 86). 16a 



„ Feeding the Boar. — The feeding of the boar should vary ac- 

 cording to his age and the season of the year. Thin, growing boars 

 need more grain than older ones, but neither should be fed so 

 that they will not grow fat, since this will impair their breeding 

 qualities, just as much as having them in a thin body condi- 

 tion. The boar should receive only as much grain as he will 

 clean up readily, and should have a chance to exercise in summer, 

 time in a pasture lot, and in the winter in a small yard adjoining 

 the pen. Succulent feed should be provided throughout the year if 

 possible: during the summer by pasturage or cut green feed, 

 giving enough grain to maintain a good condition of flesh ; during 

 the winter months either roots, pumpkins, or culled fruit may be 

 supplied. An allowance not over a pound daily of grain per 100 

 pounds live weight will be sufficient while on the summer pasture, 

 and .during the winter, two pounds grain and four to six pounds 

 roots. The grain should contain a considerable proportion of pro- 

 tein, as e.g., shorts, and fine-ground oats (2 to 1 or 3 to 1). Skim 



""Feeding Farm Animals," p. 254; see also Farmers' Bui., 614. 

 Iowa Bui. 143; N. J. Report 34, p. 191: Wis. Bui. 242; N. D. Cir. 9. 



"a Breeders' Gaz., May 15, 1916; Ky. Cir. 10; N. D. Cir. 9; Ohio Mo. 

 Bui. i, No. 2; p. 61. 



