Cadmium and copper toxicity for tomato seedlings Chamseddine Mediouni, Ons Benzarti, Baligh Tray, Mohamed Habib Ghorbel and Fatma Jemal Agron. Sustain. Dev., 26 4 (2006) 227-232 Published online: 23 January 2007 DOI: 10.1051/agro:2006008