Investigations within conventional and biodynamic farming systems

agentes nocivos agricultural chemicals agronomic characters barley biologia biologie biologie du sol biology calidad cebada cereales cereals chemicophysical properties cropping systems crops cultivos cultivos de grano economic plants engrais escandinavia essai europa europe facteur de production facteur nuisible fertilizers fisiologia fonction physiologique grain crops grazing lands hortalizas (plantas) injurious factors land malezas mauvaise herbe metabolism metabolisme metabolismo nitrogen metabolism orge papa pastizal sembrado pastizales pastures ph physiological functions physiologie physiology plantas plantas feculentas plante plante de culture plante racine plants pomme de terre potatoes prairie artificielle production factors productividad productivity produit agrochimique profitability pruebas quality recherche rentabilidad research root crops root vegetables scandinavia scandinavie sistemas de cultivo soil biology sown pastures spring wheat starch crops terre tierras tierras de pastoreo trials trigo trigo de primavera vegetable crops weeds wheats