3.3. CO2 Evolution
The rate of CO2 evolution (g/m2/hr) was found to behigher in poultry dung amended soils than the control and arsenic contaminated soils (Figure 2). Control soil showed CO2 evolution of 0.083 on 0th day and 0.095 on 60th day. Arsenic contaminated soil showed decreased CO2 evolution of 0.053 ± 0.014 on 0th day to 0.031 ± 0.009 on 60th day.