In earlier studies on temperate soils, the rate of chlorpyrifos
degradation for low spiking levels of 0.25 m g g ?1 in three soils
(sandy, sandy loam and clayey) with pH of 6e9, organic matters
0.9e4.0% and clay contents of 20e33% was air-dry < field
capacity < submerged (Awasthi and Prakash, 1997).