[Interest of the promenade variety of rye-grass for the feeding of sheep]

apport d'engrais carga ganadera conduite du troupeau ensaio esparcido essai exigence des plantes livestock management lolium manejo del ganado necesidades de las plantas ovin ovino ovinos pastagem pastizales pastures plant requirements planta forrageira potentiel de production production potential pruebas sheep stocking density taux de charge trials