SIRIPAIBOON, C.; CHAIWANAKUPT, P. Evaluation fo rDinitrogen fixation and Yield of Soybean Cultivars under Conditions of Zero and Conventional Tillage by 15N Technique. Thai Agricultural Research Journal, [S. l.], v. 17, n. 2, p. 116–128, 1999. DOI: 10.14456/thaidoa-agres.1999.12. Disponível em: https://li01.tci-thaijo.org/index.php/thaiagriculturalresearch/article/view/228747. Acesso em: 1 oct. 2026.