RAPID ESTIMATION OF AVAILABLE POTASSIUM IN SOIL BY TDS METER. International Journal of Advance Engineering and Research Development (IJAERD), [S. l.], v. 1, n. 12, p. 191–193, 2014. Disponível em: https://ijaerd.org/index.php/IJAERD/article/view/407. Acesso em: 29 jul. 2025.