WANG, Hui; ZHANG, Hao; ZHAO, Yan; XU, Renkou. Soil acidification of alfisols influenced by nitrate and ammonium nitrogen level in tea plantation. International Journal of Agricultural and Biological Engineering, Beijing, China, v. 11, n. 4, p. 168–172, 2018. Disponível em: https://www.ijabe.org/index.php/ijabe/article/view/2078. Acesso em: 1 feb. 2026.