Books & Videos Microbe Poster, Microbes in Soil, Compost, Castings Photos on the poster are those typically found in soil, compost, worm castings, and compost tea The manual has arrows and letter labels to help clarify what you see in each photo. Photos are included showing quantities of bacteria in different photos. There are a series of photos showing fungal hyphae diameters. There are photos of ciliates, flagelletes, and amoebae.