1. Department
of Analytical Chemistry, Faculty of Science, University of Granada, Avenida Fuentenueva s/n, 18071 Granada, Spain
2. Provincial Department
of Agriculture of Azilal, P.O. Box 13, 22000 Azilal, Morocco
3. Agro-pôle
Olivier, National School of Agriculture in Meknes, B.P. S/40, Meknès, Morocco