Production and qualitative parameters of simple mixtures of some Dactylis glomerata populations with clover crops

abonos nitrogenados age application rates botanical composition composition botanique composition globale crop yield cultivo mixto dactylis glomerata dose d'application edad mixed cropping nitrogen fertilizers nutritive value proximate composition rendement des cultures rendimiento de cultivos trifolium pratense trifolium repens valeur nutritive valor nutritivo variedades varieties