Carbon-based amendments for sustainable remediation of arsenic-contaminated paddy soils: An insight to greenhouse gases.

Soil organic carbon (SOC) affects biogeochemistry of arsenic (As) in soil, however, response of As bioavailability in different-textured soils to SOC sources remained partially explored. Therefore, two texturally different natural As-contaminated soils were used to unveil immobilization of As, soil biochemical health and carbon dynamics in soil fractions using different carbon-based organic amendments (biogas slurry (BGS), cow dung (CD), farmyard manure (FYM), biochar (BC), commercial coal, sugarcane bagasse (SCB) and lignite (LIG)). Results showed a significant reduction in As concentration by 25-89 % in the sandy loam soil and 24-78 % in the clay loam soil maximum with CD and BC application.

Glucose input profit soil organic carbon mineralization and nitrogen dynamics in relation to nitrogen amended soils.

Exogenous carbon (C) inputs stimulate soil organic carbon (SOC) decomposition, strongly influencing atmospheric concentrations and climate dynamics. The direction and magnitude of C decomposition depend on the C and nitrogen (N) addition, types and pattern. Despite the importance of decomposition, it remains unclear whether organic C input affects the SOC decomposition under different N-types (Ammonium Nitrate; AN, Urea; U and Ammonium Sulfate; AS).