PELTONEN, J. Plant tissue tests for predicting nitrogen fertilizer requirements in spring wheat. Agricultural and Food Science, [S. l.], v. 1, n. 5, p. 509–517, 1992. DOI: 10.23986/afsci.72464. Disponível em: https://journal.fi/afs/article/view/72464. Acesso em: 18 may. 2024.