Measured and simulated availability and leaching of nitrogen associated with frequent use of catch crops

aradura azote catch crops cereales cereals crop residues cultivos intermedios labour labranza leaching lessivage du sol lolium perenne mineralisation mineralization modele modelos models nitrogen ploughing residuos de cosechas sandy soils soil soil types sol sol sableux suecia suelo suelo arenoso sweden tillage tipos de suelos travail du sol type de sol