Short-term in situ immobilization of Cd and Ni by beringite and steel shots application to long-term sludged plots Jolanda Boisson, Michel Mench, Valérie Sappin-Didier, Paul Solda and Jaco Vangronsveld Agronomie, 18 5-6 (1998) 347-359 DOI: 10.1051/agro:19980502