Used for the detection and quantification of nitrate reductase (NOR) activity in soil samples, this ELISA kit enables researchers to assess microbial nitrogen cycling processes in environmental studies. It is particularly useful in agriculture and ecology to monitor soil health and fertility by measuring enzyme activity linked to nitrogen transformation. The kit supports rapid, high-throughput analysis, making it suitable for field studies, nutrient management planning, and research on sustainable farming practices. Results help in evaluating the impact of fertilizers, land use changes, or pollutants on soil microbial function.