PIIKKI, K.; STENBERG, B. A modified delta yield approach for estimation of economic optimal nitrogen rate (EONR) for wheat (Triticum aestivum L.) and barley (Hordeum vulgare L.). Agricultural and Food Science, [S. l.], v. 26, n. 4, p. 233–241, 2017. DOI: 10.23986/afsci.63668. Disponível em: https://journal.fi/afs/article/view/63668. Acesso em: 16 jul. 2024.