Transfer of grain legume nitrogen within a crop rotation containing winter wheat and winter barley

cereal crops crop residues crop yield cultivos de cereales cultivos de invierno culture d'hiver cycling fertilidad del suelo fixation de l'azote leaching lessivage du sol nitrogen fixation pisum sativum rendement des cultures rendimiento de cultivos residuos de cosechas rotation culturale rotational cropping soil fertility vicia faba winter crops