Heavy metals concentration in soils under rainfed agro-ecosystems and their relationship with soil properties and management practices
Views
0% 0
Downloads
0 0%
Limited access
Citation
Ch. Srinivasa rao, B. Venkateswarlu, Vijay S. Jakkula, Sumanta Kundu, S. Rama Gayatri, Suhas Wani, Kanwar Lal Sahrawat, B. K. Rajasekhara Rao, Subramanian Marimuthu. (26/5/2013). Heavy metals concentration in soils under rainfed agro-ecosystems and their relationship with soil properties and management practices. International Journal of Environmental Science and Technology, 11(7), pp. 1959-1972.
Abstract
Heavy metals are governed by parent material
of soils and influenced by the soil physicochemical properties
and soil and crop management practices. This paper
evaluates total heavy metal concentrations in rainfed soils
under diverse management practices of tropical India.
Vertisols (clayey soils with high shrink/swell capacity) had
the highest concentrations of heavy metals. However,
chromium (Cr) content was above the threshold value in
Aridisol [calcium carbonate (CaC03)]-containing soils of
the arid environments with subsurface horizon development.
Concentration increased at lower depths (>30 cm).
Basaltic soils showed higher concentrations of nickel (Ni),
copper (Cu) and manganese (Mn). Cadmium (Cd), cobalt
(Co), Cu and Mn concentrations were higher in soils cultivated
to cotton, whereas Cr concentration was above the
threshold level of 1 1 0 mg kg- 1 in food crop cultivated
soils. As the specific soil surface is closely related to clay
content and clay type, soil’s ability to retain heavy metals
is more closely tied to the specific surface than to the soil
