Carbon Mineralization Rates and Kinetics of Surface-Applied and Incorporated Rice and Maize Residues in Entisol and Inceptisol Soil Types

Mineralization of carbon (C) is a burning issue that regulated by soil attributes. It has direct impacts on crop productivity and quantification organic residue addition in soil. For better understanding achievement potential tillage benefits, comprehensive scientific C mineralization very important. Therefore, laboratory incubation experiment was conducted to investigate the rates kinetics residues (rice maize) when applied surface (as zero-tillage, ZT) incorporation conventional tillage, CT) four different types (S1 S2 Entisol; S3 S4 Inceptisols) West Bengal state, India. Results showed after 7 days incubation, there rapid phase decrease CO2-C fluxes. continued up day 14 followed sluggish nature CO2 emission day-42, almost levelling off all subsequent periods end 126 incubation. There progressive release cumulative total from soils with an increase time till last every 10% loss, about 0.376 mg/g C. evident kinetic models exponential model: = Co(1 ? e?kt). Similar rate constant (k) values were recorded both placement methods, but maximum mineralizable (C0k) higher under treatments for rice maize residue. However, similar amounts mineralized over surface. The future prediction analysis using equation e?kt) suggested incorporated into releases irrespective type. We conclude significantly increases footprints through mineralization; leaving reduces which helps achieving sustainability environmental perspective.