TY - BOOK AU - HARSHARN Singh TI - Fertilizer-use efficiency in groundnut-wheat rotation U1 - T 633.368.82 H36F PY - 1980/// CY - Ludhiana PB - P.A.U KW - PEANUTS -- FERTILIZERS AND MANURES KW - AGRONOMY KW - ROTATION OF CROPS KW - WHEAT -- FERTILIZERS AND MANURES N2 - The efficacy of N, P, K and Zn application in a fixed groundnut-wheat rotation was studied. The treatments consisted of 9 combinations of P, K level (17 kg P, 26 kg P and 26 kg P+25 kgK/ha), and their effects namely: direct, residual and cumulative compar ER -