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Easily visible colonies of bacteria continued to form on plates inoculated with soil and incubated for 24 weeks. Using two different media, 13% and 29% of easily visible colonies appeared after more than 12 weeks. In addition, 10% and 18% of all colonies had diameters of 25–200 µm (mini‐colonies), which could not be readily seen with the unaided eye. Members of soil bacterial groups that are only...