Used as a tracer in agricultural and environmental research to study nitrogen uptake in plants and soil dynamics. Enables scientists to track the movement and transformation of nitrogen in ecosystems with high precision using isotope analysis. Commonly applied in fertilizer efficiency studies, where its labeled nitrogen helps distinguish between applied and naturally occurring nitrogen. Also utilized in metabolic studies in biological systems to monitor nitrogen pathways. Its isotopic signature makes it valuable in mass spectrometry and NMR applications for accurate detection and quantification.