Establishing fuelwood plantation and fire wood tree crop performance on the highlands of Ethiopia: the case of Eucalyptus globulus Labill.ssp. globulus

bois de chauffage consumo de energia crecimiento croissance energy consumption energy forests environmental impact ethiopia etiopia eucalyptus globulus fuel crops fuelwood growth highlands impact sur l'environnement impacto ambiental rendement rendimiento silvicultura silviculture site factors sylviculture yields