Nitrogen cycling - water use efficiency interaction in semi-arid ecosystems in relation to management of tree legumes (Prosopis)

arbre clima climat climate climatic zones condiciones ambientales condition de milieu crops cultivos ecologia ecologie ecology economic plants ecosistema ecosystems environment environmental conditions environnement feed crops feed grasses feed legumes fisiologia fonction physiologique gramineas graminee grasses legumes leguminosas leguminosas forrajeras medio ambiente metabolism metabolisme metabolismo nitrogen metabolism physiological functions physiologie physiology plant production plantas plantas forrajeras plantas protectoras plante plante de culture plante de protection plante pour restauration du couvert plants production protective plants revegetation plants site factors trees zone climatique zone semi-aride