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The microbial activity, nutrient availability and aggregate stability of casts of the endogeic earthworm, Aporrectodea caliginosa, and the epigeic species, Lumbricus rubellus, were compared with that of uningested soil. Casts were collected 48hours after introducing earthworms of each species to containers which were filled with 15cm of soil covered with a 5cm layer of decomposing lucerne hay. Microbial...