TY - BOOK AU - BRAR, Kanwarjit Singh TI - Phosphorus requirment of soybean in soybean-wheat cropping system U1 - T 633.34 B70P PY - 1993/// CY - Ludhiana PB - PAU KW - SOYBEAN -- FERTILIZERS AND MANURES KW - AGRONOMY KW - CROP ROTATIONN KW - PLANTS, EFFECT OF PHOSPHORUS ON N2 - To find out the P requirement of soybean (Var. PK 416) in soybean-wheat fixed rotation, combinations of three levels of P viz. 17.5, 26.2 and 35.0 kg/ha and three patterns of P application viz. residual (direct application of P to one crop became residual ER -