Studies on the mixture combination in permanent pasture. 2; Effects of cutting management and nitrogen fertilization on the dry matter production

abonos nitrogenados application rates arrhenatherum elatius botanical composition composition botanique dose d'application fauchage frecuencia de las cosechas harvesting frequency mixed pastures mowing nitrogen fertilizers pastizal mixto pastizal permanente permanent pastures prairie mixte prairie permanente rendement rendimiento siega trisetum flavescens yields