NOPPORN JAROONCHON; KRISANA KRISANAPOOK; LOP PHAVAPHUTANON. Correlation between Pummelo Leaf Nitrogen Concentrations Determined by Combustion Method and Kjeldahl Method and their Relationship with SPAD Values from Portable Chlorophyll Meter. Agriculture and Natural Resources, Bangkok, Thailand, v. 44, n. 5, p. 800–807, 2010. Disponível em: https://li01.tci-thaijo.org/index.php/anres/article/view/244992. Acesso em: 19 may. 2024.