Insecticide Soil without SMS Soil with SMS
Regression Equation Regression Coefficient Half-life (days) Regression
Equation
Regression
Coefficient
Half-life (days)
α-HCH Y= 5.003596-0.00038 X -0.90 794 Y=5.027056-0.00341 X -0.94 88
β-HCH Y=5.001929-0.00041 X -0.93 741 Y=5.019194-0.00284 X -0.90 106
γ-HCH Y=5.005843-0.00069 X -0.93 439 Y=5.050469-0.00718 X -0.97 42
δ-HCH Y=5.005046-0.00046 X -0.88 648 Y=5.026659-0.00278 X -0.89 108
Table 5: Rate of residue decay of HCH isomers in soil (first study).