Many requests come to the Animal Husbandry Department of Iowa State College for information relating to the literature of the swine industry as well as for the names and addresses of swine registry and record associations. To supply this increasing demand this catalog and directory has been prepared to present information which is concise and up-to-date. The literature on swine husbandry is growing rapidly and many notable additions to the list of publications on this subject may be expected in the near future.

"Mineral Mixtures for Swine" is the title of a four-paged mimeographed pamphlet, No. G-21, issued by the Animal Husbandry Section in December, 1920. This pamphlet was prepared to facilitate the answering of numerous inquiries in regard to the feeding of minerals to hogs. It gave suggestions to swine men concerning the practical make-up and use of mineral mixtures.

"Just how much or protein and mineral supplements should be fed with corn to swine or various sizes, ages, and classes" is the big question which this circular considers.

Up-to-date practice is reflected in the rations presented; furthermore, these rations have been tested In actual practical feeding trials under the experimental supervision of the animal husbandry section of the Iowa Agricultural Experiment station.

Hundreds of requests come to the Animal Husbandry Department of Iowa State College for information relating to the literature of the swine industry as well as for the names and addresses of swine registry and record associations. To supply this increasing demand this catalog and directory has been prepared to present Information which is concise and up-to-date. The literature on swine husbandry is growing rapidly and many notable additions to the list of publications on this subject may be expected in the near future.

Forage crops are essential in good and economical summer rations for growing and fattening swine. They provide a way to cut down the cost of gains, inasmuch as they cut down on the requirement of meat meal tankage and other desirable protein supplements which are usually high in price. At the same time they enlarge opportunities for the quicker, more profitable raising of better and healthier pigs.

The results of pig feeding tests, conducted in 1920–21 with specialty or commercial feeds by the Animal Husbandry Section of the Iowa Agricultural Experiment Station, have been so grossly and persistently misrepresented by one company in particular that this circular Is Is· sued to present the complete figures. The misrepresentation con· slated In using only a part of the experimental figures, thus giving an Incorrect interpretation of the data secured in the test.

Making the most of the soft com is a problem that confronts tho corn growers of Iowa. Many of our people have the idea that soft corn is practically worthless but that is very far from tho truth, indeed.

Rape, rape, rape and more rape—that should be an important part of the crop program on Iowa farms that carry livestock, particularly swine, sheep and calves.

The brood sows represent in a large measure the backbone or the swine herd, hence their correct nutrition and handling are of dollars and cents Importance.

Countless hundreds of orphan pigs are lost annually in Iowa and other states of the corn belt. When they are saved and reared, it is mostly thru "b'guess and b'gosh" methods, there being usually very little system on the majority of farms in making an attempt to pull them thru. The present loss of orphan pigs can be greatly reduced by following certain feeding and management essentials which are now known.