RPR Sustain products are a high quality natural blend of soft rock phosphate, biology, gypsum and sulphur. The Sustain blends offers cheaper alternatives to Single Super (SSP) providing good levels of plant available phosphorous, sulphur and calcium. The phosphorous is in a form where it doesn’t lock up in your soils and the biology and
In many acid soils in the world, soil fertility limitations constrain successful crop production. These soils usually are low in plant-available P and often have a high P-fixing capacity that results in low efficiency of water-soluble P (WSP) fertilizers such as triple superphosphate (TSP) or diammonium phosphate (DAP) by crops. Application of unprocessed PR to
