AMNAT SUWANARIT; CHIRANEE VANICHKUL; PREEDA PARKPIAN. Zinc Critical Levels and Supplying Powers of Takhli, Loei, and Khorat Soil Series for Corn Production. Agriculture and Natural Resources, Bangkok, Thailand, v. 26, n. 4, p. 432–440, 1992. Disponível em: https://li01.tci-thaijo.org/index.php/anres/article/view/241809. Acesso em: 29 aug. 2026.