Relationship between omega values and parathion sorption capacity in soils

The relationship between Lambert's omega (omega), an idex for active fraction of soil organic matter governing pesticide sorption, and parathion sorption capacity (y) in several Indian soils was studied using 14C-labeled parathion. A regression equation log y=1.984 - 0.279 1/omega accounted for 99.5% variation. The omega values were affected by soil to solution ratios.