Yield gaps and nutrients use efficiency of apple tree (golden delicious/MM106) in the middle Atlas mountains of Morocco (En) Razouk, R. (INRA, Meknes (Maroc)), E-mail:razouk01@yahoo.fr; Kajji, A. (INRA, Meknes (Maroc)), E-mail:kajjiabdellah03@yahoo.fr; Alghoum, M. (INRA, Meknes (Maroc)), E-mail:alghoum@yahoo.fr; Daoui, K. (INRA, Meknes (Maroc)), E-mail:daoui_khalid@yahoo.fr; Charafi, J. (INRA, Meknes (Maroc)), E-mail:jcharafi@gmail.com ; In: International Journal of Environment, Agriculture and Biotechnology (IJEAB) ; Janv-Fev. 2018 Vol.3 no.1