Effect of Organic Matter, Lime and Zinc Application on the Availability of Iron and Manganese in Acid Soils under Submergence

Effects of organic matter, liming materials and zinc application on the availability of iron and manganese were evaluated on Inceptisols and Alfisols under laboratory conditions. The results showed that the amount of DTPA-extractable iron and manganese content in both the soils increased with the progress of submergence but such increased effect on iron and manganese content was decreased significantly due to application of zinc and liming materials as CaCO₃ or as CaMg(CO₃)₂. The results further indicated that such in decreased iron and manganese content in soils has been found to be counteracted by the application of higher levels of well rotten FYM and hence, suggesting its favourable effect on the release of iron and manganese in soils.