Enzymatic activities during incubation of remoistened soil samples stored for different periods

Periodical measurements for the activities of dehydrogenase, urease, and phosphatase (nuclease) were undertaken during incubation of remoistened alluvial clay and calcareous sandy loam soil samples stored (air-dried) over ten months. All enzyme activities showed fluctuating values within both incubation time and storage period. Dehydrogenase activity tended to increase by storage of samples of both soils. Urease revealed, generally, decreasing values, whilst phosphatase showed no definite trend with the lapse of storage period.