Influence of the location and the management on the yield of clover-grass mixtures - Presentation of a calculation model

abonos nitrogenados aliment pour animaux altitud altitude calidad experimentation facteur de rendement factores de rendimiento feed grasses feeds frecuencia de las cosechas harvesting frequency meadows modele modelos models nitrogen fertilizers piensos prados de siega prairie de fauche precipitation production possibilities quality rendement rendimiento uses usos utilisation yield factors yields