Soil Zinc Fractions in a Long Term Cropped and Fertilized Soils in an Acid Alfisol of Ranchi

摘要

A study was taken up to assess the various zinc fractions status and their correlation with other soil properties. On average water soluble, exchangeable, specially 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 Zn was a dominant constituent. The significant positive relationship among different fractions suggests the existence of a dynamic equilibrium of different Zn fractions in soils, while the significant positive relationship of different fraction of Zn with organic carbon, silt and clay suggests the dependence of Zn availability on organic matter content and finer fractions of soils.