Used in agricultural and plant biology research to quantify nitrate reductase enzyme activity in plant tissues. Helps assess nitrogen metabolism efficiency, monitor plant response to nitrogen availability, and evaluate fertilizer utilization in crops. Supports studies on plant growth optimization, stress responses, and sustainable farming practices by providing a reliable measure of enzymatic activity related to nitrate assimilation. Widely applied in laboratories working on crop physiology, environmental plant science, and genetic modification of plants for improved nitrogen use efficiency.