[Nitrate leaching after ploughing out of clover/grass]

absorption de substances nutritives aradura azote crop yield danemark denmark dinamarca feed grasses grasslands herbage hordeum vulgare labour leaching lessivage du sol mineralisation mineralization nitrate nitrates nitratos nitrogen nutrient uptake ploughing praderas rendement des cultures rendimiento de cultivos rhizosphere rizosfera rotation culturale rotational cropping secale cereale triticum