1. Department of Agronomy, Faculty of Science, University of Batna, Batna, Algeria
2. Department of Physics, Faculty of Science, University of Batna, Batna, Algeria
3. Environmental Physics and Horticulture Research Unit, Agrocampus Ouest INHP, 2, Rue Le Nôtre, 49045 Angers, France
4. Renewable Energy Center of Ghardaïa, Ghardaïa, Algeria