CHEN, Shaomin; MA, Lihui; HU, Tiantian; LUO, Lihua; HE, Qiong; ZHANG, Shaowu. Nitrogen content diagnosis of apple trees canopies using hyperspectral reflectance combined with PLS variable extraction and extreme learning machine. International Journal of Agricultural and Biological Engineering, [S. l.], v. 14, n. 3, p. 181–188, 2021. DOI: 10.25165/ijabe.v14i3.6157. Disponível em: https://ijabe.org/index.php/ijabe/article/view/6157. Acesso em: 27 jan. 2026.