TY - BOOK AU - BACHCHU Prased TI - Organo-metallic interactions in soils in relation to zinc ion transport and plant nutrition U1 - T 631.417 B12O PY - 1975/// CY - Ludhiana PB - P.A.U KW - SOIL CHEMISTRY KW - ORGANIC MANURES HUMIC SUBSTANCE KW - SOILS KW - SOILS - ZINC CONTENT KW - ZINC N2 - The humic acids were characterized by higher carbon and lower oxygen contents as compared to their fulvic counterparts Empirical formulae of these substances were computed from the elemental and functiona, group analysis The molecular weights of fulvic ac ER -