Optimisation of seedlings production of the argan trees (Argania spinosa L. Skeels) in nurseries in eastern Morocco by sowing in clusters in the greenhouseZaineb Boulida, Chaymae Boukhaffa, Qamar Mesbahi, Ibtissam Mzabri, Noureddine Kouddane and Abdelbasset BerrichiBIO Web Conf., 215 (2026) 01015DOI: https://doi.org/10.1051/bioconf/202621501015