GRIEPENTROG, Hans-Werner. Teilflächenspezifische Düngung. agricultural engineering.eu, [S. l.], v. 52, n. 3, p. 124–125, 1997. DOI: 10.15150/lt.1997.2537. Disponível em: http://195.37.233.11/landtechnik/article/view/1997-52-3-124-125. Acesso em: 6 mai. 2024.