“…The general trend of the seasonal change of microorganisms reported by many workers (3,4,5,6,7,8,9,35,36) is that each of fungi, actinomycetes and bacteria usually shows the maximum number in spring or autumn and the minimum number in summer or winter, but the number of them sometimes does not decrease in summer (37,38). Especially there are some cases where such decrease does not take place in actinomycetes because of its tolerance to low moisture content (4).…”