A

Fig. 3.6. Manipulation of living soil organisms with a calibrated pipette and micropipette, from soil in a watch glass into recipients for enumeration. (A) Soil suspension in droplets on an agar plate. (B) Soil sample in liquid medium on a Petri plate. (C) Soil dilution on a haemocytometer counting chamber. (D) Soil suspension in a depression microscope slide, with Vaseline edges to prevent evaporation. (E) Soil suspension under a coverslip on a microscope slide, with Vaseline edges to prevent drying and squashing of the specimen.

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