Nutrient availability as influenced by soil pHThis diagram details the influence of soil pH on the availability of different nutrients to turf plants.
Nitrogen is most available at pH levels of between 6.0 and 8.0. Phosphorus is most available at pH levels of between 6.5 and 7.5 and 8.75 to 10.0. However it is least available at 8.5. Potassium and sulphur are most available at pH levels of between 6.0 and 10.0. Calcium is most available at pH levels of between 7.0 and 8.5. Magnesium is most available at pH levels of between 6.5 and 8.5. Iron is most available at pH levels of between 4.0 and 6.0. Manganese is most available at pH levels of between 5.0 and 6.5. Boron is most available at pH levels of between 5.25 and 7.0 and 8.75 to 10.0. However, it is least available between 8.0 and 8.5. Zinc and copper are most available at pH levels of between 5.0 and 7.0. |