TY - BOOK AU - JINDER Paul TI - Effect of continous application of N, P, K, and Zn on yield, nutrient uptake and build-up and depletion of nutrients from the soil in a fixed maize-wheat crop rotation U1 - t 633.1 J46E PY - 1974/// CY - Ludhiana PB - P. A. U KW - ROTATION OF CROPS KW - MAIZE -- FERTILIZER & MANURES KW - NITROGEN FERTILIZERS KW - WHEAT -- FERTILIZERS & MANURES ER -