Tunisie: le pistachier

age arbre edad especies exigence des plantes farm area forestry operations fruits frutas grafting greffage huerto frutal injerto necesidades de las plantas operaciones forestales orchards pepiniere pistache pistachios pistacho pistacia vera plant nurseries plant production plant requirements plantation planting plantule pollination pollinisation rendement rendimiento seedlings species surface d'exploitation trees vegetative propagation verger viveros yields