Ruggiero, Celestino, and Giovanna Angelino. “Changes of Root Hydraulic Conductivity and Root/Shoot Ratio of Durum Wheat and Barley in Relation to Nitrogen Availability and Mercury Exposure”. Italian Journal of Agronomy 2, no. 3 (September 30, 2007): 281-290. Accessed April 19, 2021. https://www.agronomy.it/index.php/agro/article/view/ija.2007.281.