Earthworms encourage the mineralization of soil organic matter, the production of nutrients and the growth of plants through their feeding habits in the soil. But unsustainable development along with rapid urbanization and industrialization degrades the soils at an alarming rate which increases the level of different contaminants, i.e., heavy metals in the soil. The present study was conducted to assess the heavy metals, pH and organic carbon in agricultural, non-agricultural and industrial soils and their effects on the earthworm community structures. A total of seven earthworm species belonging to two families (Megascolecidae and Octochaetidae) were reported in this study. The earthworm species Metaphire posthuma was the most abundant in all collected soils, i.e., agricultural, non-agricultural and industrial soil with a relative abundance of 76.56%, 77.19% and 78.85%, respectively. The abundance and biomass of M. posthuma were in the order of agricultural soil > non-agricultural soil > industrial soil. It was also reported that the abundance of both anecic and endogeic species was higher in agricultural soils followed by non-agricultural and industrial soil. The findings of heavy metals indicated that industrial soil has the highest concentration of heavy metals followed by non-agricultural and agricultural soils. The contamination factor, enrichment factor, geoaccumulation index, pollution index and modified pollution index showed high, moderate and less pollution levels at industrial, non-agricultural and agricultural soil, respectively. The present study also indicated that Cd and As showed severe contamination in all studied soil types.

encourage通过在土壤中的摄食习性来促进土壤有机质的矿化，养分的产生和植物的生长。但是，不可持续的发展以及快速的城市化和工业化使土壤退化的速度惊人，这增加了土壤中各种污染物（例如重金属）的含量。本研究旨在评估农业，非农业和工业土壤中的重金属，pH和有机碳及其对the群落结构的影响。这项研究报告了总共属于两个科的七种Me（Megascolecidae和Octochaetidae）。hu属化石在所有收集的土壤中，即农业，非农业和工业土壤中，其含量最丰富，相对丰度分别为76.56％，77.19％和78.85％。腐竹分枝杆菌的丰度和生物量按农业土壤>非农业土壤>工业土壤的顺序排列。还据报道，在农业土壤中，风俗和内生菌种的丰度都较高，其次是非农业和工业土壤。重金属的发现表明，工业土壤中重金属的浓度最高，其次是非农业和农业土壤。工业，非农业和农业土壤的污染因子，富集因子，地质累积指数，污染指数和改良污染指数分别显示高，中和低污染水平。本研究还表明，镉和砷在所有研究的土壤类型中均显示出严重的污染。