Leaching of nitrate from agriculture to groundwater: the effect of policies and measures in the Netherlands

arable land azote eau souterraine exploitation agricole explotaciones agrarias farming systems farmland farms fosforo grassland soils grasslands groundwater groundwater pollution herbage leaching lessivage du sol modele modelos models nitrate nitrates nitratos nitrogen phosphore phosphorus policies politique pollution de l'eau souterraine praderas sandy soils simulation models soil types sol d'herbages sol sableux statistical methods statistics suelo arenoso suelo de praderas terre agricole tipos de suelos type de sol