Assessment of Fluoride in Rainfed and Irrigated Agricultural Soil of Tonalite—Trondjhemite Series in Central India

摘要

The systematic and comprehensive geochemical analysis of fluoride (F) in 20 agricultural soil samples was carried out to understand the spatial variability, mechanism of retention and release, and the areas of potential risk due to poor or high concentrations of soil F around Sidhi District, Central India. The spatial variations in physicochemical parameters revealed significant difference in the methods of cultivation due to geomorphological constraints, availability of surface water and ground water, rainfall pattern, etc., in the study area. The north and small pocket in central Sidhi were rich in fertile soils due to availability of surface water and ground water. The southern and eastern Sidhi were rainfed areas, hence, the mono-cropping systemby traditional methods showed less impact on the soil physicochemical parameters. The soil F varied from 366.94 to 1178 mg/kg and 2-4 times greater than the background soil value (320 mg/kg) of the world. The pollution indexes were <1 revealed prevalence of elevated soil fluoride.