This is the fourth in a series of experiments conducted to determine
the value of trace minerals in a typical fattening ration. Three previous
experiments, similar to this one, were reported in Kansas Agr. Exp. Sta.
Cirs. 297, 308 and 335.
Chemical analyses of feeds commonly used in cattle rations in this
area show there is no deficiency in any of the trace minerals: cobalt,
copper, iodine, iron, manganese and zinc. It is possible the minerals may
not be adequately balanced or available to the animal at all times. The
objective of this test is to determine if trace minerals, when fed at a
commonly used level, will influence rate of gain and feed efficiency.
