Effect of the vine age on the evolution of the number of flower buds of Alicante Grenache noir grown in El Khanguet (Tunisia) [fruit set, flower abscission]

abscision abscission age beverage crops bourgeon buds disorders edad environmental factors facteur du milieu factores ambientales fleur flores flowers fructification fruiting grapevines plantas para bebidas trastornos trouble tunisia tunisie vid vigne vitis vinifera yema (planta)