KRUTKUN, T. Effect of Addition of Sulfuric Acid Solution into Map Bon Sandy Loam Soil on Growth of Cassava. Agriculture and Natural Resources, Bangkok, Thailand, v. 19, n. 1, p. 42–44, 1985. Disponível em: https://li01.tci-thaijo.org/index.php/anres/article/view/241133. Acesso em: 18 sep. 2026.