ROLSTON, M.; MCCLOY, B.; CHYNOWETH, R. Predicting nitrogen requirement in perennial ryegrass seed crops. NZGA: Research and Practice Series, [S. l.], v. 14, p. 59–65, 2010. DOI: 10.33584/rps.14.2008.3190. Disponível em: https://www.nzgajournal.org.nz/index.php/rps/article/view/3190. Acesso em: 13 sep. 2026.