Efficiency of phosphate fertilizers: I. imediate effect

Abstract

Ordinary superphosphate, triple superphosphate, Olinda rock phosphate, thermos-phosphate, ammonium poliphosphate, diammonium phosphate, potassium metaphosphafe were applied to regosol and red yellow latosol and evaluated as phosphorus sources for wheats in greenhouse experiment. Considering the dry matter weight and phosphorus content in the plants, the experiment showed that triple superphosphate, ammonium poliphosphate and diammonium poliphosphate were the best phosphorus sourcecs in regosol, whereas in the latosol, ammonium poliphosphate, diammonium poliphosphate and potassium metaphosphate were the best sources.