LE, T. T.; DANG, T. V. A. Effects of Nitrogen Concentration on Growth and Quality of Hydroponically Grown Purple Kale (Brassica oleracea var. sabellica). Hue University Journal of Science: Natural Science, [S. l.], v. 134, n. 1S-2, p. 5-16, 2025. DOI: 10.26459/hueunijns.v134i1S-2.7893. Disponível em: https://jos.hueuni.edu.vn/index.php/hujos-ns/article/view/7893. Acesso em: 27 dec. 2025.