Insecticide Soil without SMS Soil with SMS
Regression Equation Regression coefficient Half-life (days) Regression equation Regression coefficient Half-life (days)
α-HCH Y= 4.993585-0.00036 X -0.93 828 Y=5.013331-0.00276 X -0.94 109
β-HCH Y=5.000843-0.00041 X -0.99 738 Y=5.019868-0.00241 X -0.95 125
γ-HCH Y=4.993056-0.00053 X -0.93 570 Y=5.055985-0.00803 X -0.97 37
δ-HCH Y=5.004205-0.00044 X -0.96 686 Y=5.03626-0.00329 X -0.89 91
Table 6: Rate of residue decay of HCH isomers in soil (second study).