A rapid semiquantitative Mg-urine-test suitable for field estimations of the magnesium status in ruminants

A semiquantitative Mg-urine-test suitable for field examination of the Mg-status in ruminants has been tested under practical conditions. Good agreement between the semiquantitative test and quantitative atomic absorption Mg-estimations was found. It is recommended always to examine urine from at least two-three animals in a herd to get a reliable picture of the Mg-status of the herd.