The Comparing of Olsen and Joret-Hebert methods for extraction of available phosphorus in soil different in the content of calcium carbonate, and determination optimum shake time. Journal of Hama University , [S. l.], v. 3, n. 14, 2021. Disponível em: https://hama-univ.edu.sy/ojs/index.php/huj/article/view/485. Acesso em: 25 apr. 2026.