[Study of the agroecosystem of Sabaneque region (municipality of Tausa, Cundinamarca [Colombia]) and some of its effects on vegetation and soil]

agricultura agriculture barbecho chemicophysical properties colombia colombie comunidades rurales condiciones sociales condition sociale economic situation ecosistema ecosystems environment environnement exploitation agricole explotaciones agrarias fallow farms medio ambiente papa pomme de terre potatoes rural communities social conditions soil sol suelo vegetation