Phosphorus, like calcium, is a major component of bone. Phosphorous also plays a role in energy transfer reactions. It is important that phosphorous be balanced to calcium, which is determined through forage analysis. The calcium to magnesium ratio should also roughly be 2: 1. Monosodium Phosphate 22% concentration – 220mg/g (to get 220mg of Phosphorus you need to feed 1 g of the powdered mineral).