The effect of sludge and urea onoxaniyl adsorption, persistence, mobility and degradation on the three soils of Aligarh, viz., salinecalcareous (Aridisol), alkaline calcareous (Entisol) and alluvial (Inceptisol) soils revealed that the amount of oxamyl adsorbed in these soils was correlated with the organic matter content of the soil. The sludge was virtually ineffective with respect to oxamyl adsorption, whereas urea increased oxamyl adsorption, due to decrease in soil pH because of presence of urea. The persistence and mobility of oxamylwas more in unamended soils than in urea or sludge-treated soils. The rate of degradation of oxamyl in sludge and urea amended soil was more than in the untreated soil and followed the order: sludge-amended > urea-amended > unamended soil.
Oxamyl, adsorption, persistence, sewage sludge, nitrogen fertilizer
