Nutrient leaching and surface runoff in field lysimeters on a cultivated soil. Nutrient balances 1974-81

abonos agua de drenaje azote azufre capa arable del suelo cereales cereals chlore chlorine cloro couche arable crop yield drainage water eau de drainage eau de ruissellement engrais organique escorrentia fallow systems feed crops fertilizers fosforo gramineas graminee grasses leaching lessivage du sol leys nitrogen phosphore phosphorus plantas forrajeras potasio potassium pradera temporal prairie temporaire rendement des cultures rendimiento de cultivos runoff sistemas con barbecho soufre sulphur top soil