WIGLEY, K.; OWENS, J.; TRETHEWEY, J.; EKANAYAKE, D.; ROTEN, R.; WERNER, A. Optical sensors for variable rate nitrogen application in dairy pastures. Journal of New Zealand Grasslands, [S. l.], v. 79, p. 223–227, 2017. DOI: 10.33584/jnzg.2017.79.533. Disponível em: https://www.nzgajournal.org.nz.myth.agency/index.php/JoNZG/article/view/533. Acesso em: 22 sep. 2026.