PHAKAMAS, N.; YAMPRACHA , S. Application of soil test kit for evaluating nitrogen fertilizer requirement of Napier Pakchong 1 grass in Thailand. International Journal of Agricultural Technology, [S. l.], v. 14, n. 7, p. 1599–1610, 2018. Disponível em: https://li04.tci-thaijo.org/index.php/IJAT/article/view/8705. Acesso em: 30 sep. 2026.