Estimation of Available Nitrogen Content in Soil Directly by Temperature Measurement. International Journal of Advance Engineering and Research Development (IJAERD), [S. l.], v. 1, n. 7, p. 81–85, 2014. Disponível em: https://ijaerd.org/index.php/IJAERD/article/view/5460. Acesso em: 9 sep. 2025.