Beschreibung:
<p>From 83 cobalt analyses of four foods of pheasant (Phasianus colchicus)--corn, rose hips (Rosa spp.), foxtail (Setaria spp.) seeds, and ragweed (Ambrosia spp.) seeds--and from analyses of 95 pheasant livers it is concluded that cobalt is not a limiting nutritional factor for pheasants in southern Minnesota. Average concentrations of cobalt in ppm were: corn, 0.040; rose hips, 0.069; foxtail, 0.084; ragweed, 0.228; and pheasant livers, 0.23. Concentration of cobalt in foods varied considerably locally and there was no statistically provable difference in concentrations in the four foods or in the livers from glaciated and nonglaciated areas. No seasonal trend in cobalt concentrations in the livers was noted.</p>