Gypsum requirement is a good indicator for qualifying the amount of gypsum required for amelioration of sodic soils to improve the soil health. GR of Vani Vilas command area, Hiriyur taluk, Chitradurga district was estimated to know the amount of gypsum required and the indicators such as pHs, ECe, SAR and ESP were also studied to know the relation among them and work out a regression equation to predict the GR based on ESP values for the soils of Vani Vilas command area of Hiriyur taluk, Chitradurga district. The soils were found to be moderate to strongly alkaline in reaction (pHs 8.31 to 8.88), salt content was low to moderate (ECe 1.76 to 3.38 d Sm-1), Exchangeable sodium content varied from 1.64 to 7.74 cmol (p+) kg-1, Sodium adsorption ratio ranged from 6.66 to 12.23, DTPA - Extractable micronutrients Fe, Mn, Cu, Zn ranged from 4.69 to 9.31 mg kg-1, 8.03 to 13.03 mg kg-1, 0.58 to 2.89 mg kg-1, 0.45 to 0.71 mg kg-1 and Exchangeable sodium percentage of the soils ranged from 9.13 to 25.79 per cent, when ESP more than ten in black soil it is sufficient to cause problem to soil, hence it is observed from majority of data that soils required amelioration to improve soil health by adding suitable amendments and leaching.