Ecological assessment of different nitrogen fertilizer rates in a vegetable crop rotation

abonos npk agroecosistemas agroecosystems application rates brassica oleracea capitata crop rotation crop yield dose d'application ecologia ecologie ecology engrais npk fluvisol fluvisoles fluvisols groundwater pollution lactuca sativa npk fertilizers plant soil relations pollution de l'eau souterraine relaciones planta suelo relation plante sol rendement des cultures rendimiento de cultivos rotation culturale solanum tuberosum