Studies on the grassland management in late-autumn and early-spring, 5; Effect of application levels of NPK fertilizer at pasture establishment on winter survival, early spring growth and yield of grasses

abonos npk application rates automne autumn conduite des herbages crecimiento croissance dose d'application engrais npk gramineas graminee grasses grassland management growth manejo de praderas npk fertilizers primavera printemps rendement rendimiento spring yields