The active fungi occurring in a brown forest soil and in a podzol soil developed from the former following replacement of the mixed oakwood cover by Calluna were studied seasonally, employing the screened immersion-plate technique. More mycelia were isolated from the podzol soil than from the brown forest soil and the B 1 horizon of the former was the most favourable horizon for growth, particularly for Mucor ramannianus . Maximum growth was obtained in summer and least in winter, in both soils. Over fifty species were isolated, the most common being, Trichoderma viride Tribes I and II, Mucor ramannianus, Penicillium frequentons, Mortierella humilis, M. gracilis, M. nana and M. stylospora . Soil fungal patterns, based on percentage frequency of occurrence, are shown for both soils and indicate that the change in vegetation and soil type modified the basic brown forest soil fungal pattern.