Thirty head of good quality Hereford steer calves, 10 head to a lot,
were used in the study. They were the lightest calves of a shipment of
220 steer calves from the Brite Ranch at Marfa, Texas. They cost 29
cents a pound delivered to Manhattan, Kan., November 3, 1952.
They were fed prairie hay and 1 pound of soybean pellets until they
were started on test December 19, 1952. All weights are full weights
taken about 7: 00 a.m. before feeding, except the initial and final
weights of the full-feeding period, which were taken after an overnight
stand in drylot.
The trace minerals were fed as a trace mineral premix added to the
soybean oilmeal to furnish the following amounts in milligrams per
head daily in the wintering and fattening ration, respectively: manganese
25.0, 56.3; iodine .87, 1.97; cobalt .55, 1.25; iron 20.5, 46.13;
copper 1.62, 3.65; and zinc 1.52, 3.42.
