Trace mineral nutrition of grazing ruminants

Larry L. Berger, Ph.D.
Salt Institute
Salt and Trace Minerals newsletter
Summer 1992 (Vol. 24, No. 2)

Grazing ruminants seldom display clinical deficiency symptoms. Recent studies have shown that even marginal trace mineral deficiencies produce sub-clinical deficiencies that depress growth, reproduction and the immune system. Even analysis of nutrients in forage cannot always predict nutritional sufficiency.