Casa, Raffaele, Andrea Cavalieri, and Benedetto Lo Cascio. “Nitrogen Fertilisation Management in Precision Agriculture: A Preliminary Application Example on Maize”. Italian Journal of Agronomy 6, no. 1 (February 22, 2011): e5. Accessed January 26, 2020. https://www.agronomy.it/index.php/agro/article/view/ija.2011.e5.