Phytotoxicity and chelating capacity of spent coffee grounds: Two contrasting faces in its use as soil organic amendment

1. Cervera-Mata, A.
2. Navarro-Alarcón, M.
3. Rufián-Henares, J.Á.
4. Pastoriza, S.
5. Montilla-Gómez, J.
6. Delgado, G.