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Natural Fluctuation of Microbial Activity Related to Nitrogen Cycle in Rice Paddy Soils as a Basis for Assessing the Side-Effect of Pesticides on Soil Ecosystem
Soil microbial parameters of two different rice paddies were monitored, from May 1997 to Dec. 1998 (20 months). During the two growing seasons, the natural variability in the microbial communities activity were monitored in order to assess the effects of pesticide usage on rice paddy soils. The study focused mainly on the effect of pesticides on the nitrogen cycle such as nitrification, ammonification, protease activity and ammonium oxidizing bacterial population (AOB) being what was monitored. |