Abstract: The concentration and distribution of Pin grains and stalks of sorghum, maize and soybean and the harvested Pfrom producing each unit of grains are markedly influenced by soil Pcondition and crop growing status. Abetter soil Psupply and better crop growth can induce a higher Pconcentration in grain, larger ratio of grain P/stalk Pand more Pconsumption for producing each unit of grain yields.

Key words: Phosphorus cycling, Distribution of phosphorus in crops