A MADHAVI, P SURENDRA BABU, P VENKATA REDDY. Requirement of phosphorus and its use efficiency by sunflower (Helianthus annuus L.) in high phosphorus soils: REQUIREMENT OF PHOSPHORUS AND ITS EFFICIENCY BY SUNFLOWER IN HIGH PHOSPHORUS SOILS. J. Oilseeds. Res. 2015;32(2). doi:10.56739/jor.v32i1.141816