Distribution of Different Forms of Zinc in Benchmark and Other Established Soil Series of Maharashtra

On an average, water soluble, exchangeable, specifically adsorbed, acid soluble, Mn-occluded, organic matter-occluded, amorphous Fe-occluded, crystalline Fe-occluded fractions of zinc contributed very little whereas the residual fraction of zinc was a dominant constituent (95.9%) in these soils. The positive relationships amongst these fractions suggest the existence of a dynamic equilibrium of zinc fractions in soils, while the positive and significant relationship of solution and exchangeable fractions of Zn with organic carbon suggested the dependence of zinc availability on organic matter content of the soil.