Department of Soils, Haryana Agricultural University, Hisar, Haryana, 125004
Incubation studies indicated that addition of CaCO3 increased pyrites oxidation and the effects were significant only up to 10% CaCO3 level. Results from bottomless pot experiment revealed that pyrites added @ 150% gypsum requirement was effective to reduce soil pH from 10.2 to 9.4, EC from 8.5 to 1.7 mmhos/cm and ESP from 72 to 31 in presence of 10% CaCO2. Grain yield of rice, content of Ca and S in rice grains increased while that of Na decreased with increasing levels of pyrites and CaCO3. Iron concentration was increased with pyrites and decreased with CaCO2 application.
Pyrites, CaCO3, saline sodic soils, rice, nutrient composition
