Nitrogen inputs and losses from clover/grass pastures grazed by dairy cows, as affected by nitrogen fertilizer application

abonos nitrogenados angleterre bovin carne cattle cereales cereals controlled grazing cows denitrification england environmental impact fixation de l'azote ganado bovino grain granos immobilisation immobilization impact sur l'environnement impacto ambiental inglaterra leaching lessivage du sol losses losses from soil mais maize meat mineralisation mineralization new zealand nitrogen fertilizers nitrogen fixation nueva zelandia pastizales pastoreo controlado pastures perte reino unido united kingdom urea uree vaca vache viande volatilisation volatilization zea mays