Show minerals for cow the minerals that are used most by the dairy cow and therefore most likely to be lacking in the ration are calcium phosphorus and common salt legume hays when grown on soils not deficient in lime w will ill usually supply sufficient calcium an adequate supply of phosphorus can be secured from the grain r ration if it contains as much as 30 per cent of feeds rich in this material such as wheat bran or cottonseed meal the salt should be supplied by adding one pound to each pounds of the grain mixture and also allowing the animal free access to it in the pasture or exercise lot |