Phosphorus for high rainfall pastures

Soil testing for phosphorus provides a reliable indication of when the level of phosphorus in a soil is likely to be adequate for pasture production in the next growing season. It is a waste of money to apply phosphorus fertiliser when soil testing indicates none is required, or to acidified soils, or to undergrazed pastures, or to pastures dominated by poorly productive species. Legumes have higher phosphorus requirement than grasses. Critical soil test phosphorus values do not change when nitrogen fertiliser is applied.https://library.dpird.wa.gov.au/bulletins/1061/thumbnail.jp