In the classic investigations by Lawes and Gilbert, food containing 100 pounds of dry matter produced a live-weight increase of nine pounds in steers and 11 pounds in sheep. At the Wisconsin station, sheep required less food than steers per pound of gain. During rapid fattening of sheep 500 pounds of clover hay and 400 pounds of maize may produce 100 pounds of increase in live weight. While swine require a less weight of food for a pound of increase than sheep, on account of the more digestible character of the food eaten, yet the Wisconsin station found that the expense of producing a pound of increase was less in sheep on account of the less expensive character of the food.
MEAT AND MILK PRODUCTION COMPARED
A summary of the investigations of American experiment stations shows that 100 pounds of dry matter produced ten pounds of increase in live weight of steers. The same quantity of food when fed to milch cows produced 74 pounds of milk, plus one pound of increase in live weight. This 74 pounds of milk contained 3-1/4 pounds of fat. In general, therefore, the food required to produce a pound of butter fat is about three times that required to produce a pound of increase in steers.
COST OF STEER FEEDING
The fattening of beef animals is largely conducted by farmers who make a specialty of it. This is particularly true in the so-called corn belt. Into this region are gathered the two and three-year-old and, more rarely, yearling steers, many of which have been reared in Texas or in the mountain states where the supply of maize is not sufficiently ample to fatten them. These are placed in paddocks with open sheds, where they are fed from 90 to 150 days, after which they are sent to market for slaughter. The food consists usually of maize fodder, maize stover, hay, maize (usually in the ear), a little bran, linseed or cottonseed oil meal. The ration per day during rapid fattening is about 20 pounds of dry matter per 1,000 pounds of live weight, containing 16 pounds of digestible substance, of which 1.25 to 1.75 is digestible protein. One hundred pounds of increase may be obtained under average conditions from 150 pounds stover, 325 pounds of hay, 775 pounds of maize and 75 pounds of cottonseed meal.
Great variations will occur, however, depending upon the condition of the animals at the beginning of the feeding period and the degree of fatness or finish to which the animals are brought before placing upon the market. In any case, the food consumed will cost more than the value of the increase. The only way that steers can be profitably fattened is by increasing the value per pound of the animal. Thus an 800-pound steer may be purchased at five cents per pound, or $40. After feeding, say 150 days, he may weigh 1,100 pounds, when to bring a profitable return he should sell for 6 cents a pound, or $65. This is a gain of $25, eight of which came from the increase in value of the original 800 pounds. Usually steers cannot be fattened profitably unless there is an increase of at least three-quarters of a cent per pound in the value of the animals and then, as previously explained, only in connection with the hogs which follow them.
COST OF PRODUCING MILK AND BUTTER FAT
Well-selected and properly fed cows may produce 240 pounds of butter fat annually. The amount of fat obtained will depend upon the richness of the milk. Thus, 8,000 pounds of 3% milk, 6,000 pounds of 4% milk, or a trifle less than 5,000 pounds of 5% milk, will give this quantity of butter fat. These are customary returns from different types of cows.
If each cow in the herd is dry for six weeks each year the daily average of the cows actually milked will be three-quarters of a pound of butter fat. There are herds which make an average of nine-tenths of a pound of butter fat per day, but to secure this result requires superior cattle, careful feeding and more than ordinary care.
The standard ration for milch cows weighing from 1,000 to 1,200 pounds is 25 pounds of dry matter, two-thirds of which is digestible. The ration should contain not less than two pounds of digestible protein. In ordinary practice, about ten pounds of the dry matter of the ration is obtained from maize silage, nine pounds from hay and about six pounds from grain or other concentrates. In general, this is obtained by feeding 35 pounds of maize silage, ten pounds of hay and seven to eight pounds of concentrates. The silage may be estimated at one-tenth to one-eighth of a cent a pound, hay at from one-fourth to one-half cent and concentrates at from three-quarters to one and one-quarter cents per pound, varying, of course, with the different sections of the country. The amount of food needed will vary somewhat with the size of the animals, but will depend much more largely upon the amount of milk and butter fat given. While maintaining substantially the general average just given for the whole herd, it is the practice of careful feeders to vary the amount of concentrates fed to each individual in accordance with the amount of butter fat or milk given.