Transformation of Native and Applied Zinc in Laterite Soils under Submergence

Transformation of native and applied Zn in/our laterite soils undersubmergence were studied under laboratory condition. The results showed that water soluble plus exchangeable and the crystalline sesquioxides bound forms of soil Zn showed a gradual decrease. The organically bound, MnO₂-bound and amorphous sesquioxides bound forms of Zn also indicated a decrease after showing an increase during initial period of incubation. The amount of applied Zn transformed to water soluble plus exchangeable and organically bound forms was also very low. Only 22.5 to 35..5 per cent of the applied Zn could be accounted/or by its presence in the five determined/orms and remaining 64.7 to 77.5 per cent was converted to residual form.