The effects of environmental factors on components and attributes of a Mediterranean grassland

abonos abonos fosfatados biomasa biomass biomasse botanical composition carga ganadera composition botanique crecimiento croissance engrais environmental factors facteur du milieu factores ambientales fertilizers fosforo grasslands grazing growth herbage marginal land overgrazing pastoreo phosphate fertilizers phosphore phosphorus piedras pierre praderas sobrepastoreo stocking density stones taux de charge terre marginale tierras marginales trifolium