Up to the present, so far as I am aware, the only method of demonstrating the presence of Protozoa in soils has been by cultures. This method, of course, leaves untouched the really important question ...
THE physiology of encystment and excystment of Protozoa and other micro-organisms has received little attention. In the case of the ciliate Colpoda cucullus, it has been earlier shown 1 that emergence ...
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