Yémen (1) Sud (1) Breeding (1) Agriculture (1) Methods (1) Uplands (1) Vocation (1) Turnover (Business) (1) Prospecting (1) Plants (1) Passer (1) Paleoecology (1) Nature (1) Hunting and gathering societies (1) Goal (Psychology) (1) Geology (1) Floods (1) Flight (1) Farmers (1) Face (1) Environmental archaeology (1) Burning of land (1) Methods (1) Adaptations (1) Adaptations (1) Management (1) Population (1) Land tenure (1) Irrigation (1) Animales--Mejora genética (1)