Used for detecting and quantifying plant FDA (Fluorescein Diacetate) activity in environmental and agricultural samples. This kit helps assess microbial activity in soil by measuring the hydrolysis of FDA into fluorescent fluorescein, indicating overall metabolic activity of microorganisms. Commonly applied in soil health evaluation, compost quality testing, and monitoring the impact of pollutants or agricultural treatments on microbial communities. Provides a sensitive, colorimetric method suitable for high-throughput analysis in research and industrial labs.