The potential of phosphorus supply is higher in soil of plain region than those oecurring on hilly land in Liaonillg Provillce.The rate of response of crop yield to phosphatic fertilizer showed no definit correlation with the content of total phosphorus and organic phosphorus,but was highly correlated with the content of available phosphorus.The order of eontent of available phosphorus in neutral and weak acid soil is as follows:Meadow soil>Alluvial soil>Brown earth.As for tlle calcareous soils,the order is:Saline soil>Calcareous meadow soil>Cinnamon soil.