Association of Zinc and Copper with Free Sesquioxides and Extractable Micronutrients in Arid Soils of Rajasthan

Amorphous and crystalline sesquioxides of Aridisols were studied for the micronutrient elements (Cu and Zn) content and relationship with DTPA extractable Cu and Zn. A larger proportion of Cu and Zn was associated with amorphous sesquioxides than that with crystalline. The oxides associated elements content showed a significant positive correlation with the contents extracted by DTPA solution.