Transformation of applied Zn into different forms at varying periods of submergence was evaluated in ten old alluvial rice growing soils under laboratory condition. The amount of Zn recovered in water soluble plus exchangeable, organically and crystalline sesquioxide bound forms recorded a progressive decrease with an incrrease in residual forms upon submergence. Zinc recovered into complexed and amorphous sesquioxide bound forms was not appreciably influenced by the period of submergence. The amount of applied Zn recovered in different forms exhibited significant correlation with most of the soil properties excepting AMOX form which showed a significant positive correlation with sesquioxides only.
Submergence, old alluvial soil, applied Zn transformation, Zn forms
