Long-term efficiency of farmyard manure in the beet crop rotation on heavy-textured brown soils

abonos absorption de substances nutritives agricultural chemicals agronomic characters amendement du sol barley cambisol cambisoles cambisols cebada cereales cereals clay soils cropping patterns crops cultivos cultivos de grano dicotiledoneas dicotyledons economic plants engrais engrais organique engrais pk enmiendas del suelo environment environnement farmyard manure feed crops feed legumes fertilizantes nitrogenados fertilizantes pk fertilizers fisiologia fonction physiologique genetic soil types grain crops hortalizas (plantas) industrial crops legumes leguminosae leguminosas leguminosas forrajeras lithological soil types loam soils medicago medicago sativa medio ambiente mode de culture nitrogen fertilizers nutrient uptake orge papa papilionoideae physiological functions physiologie physiology plantas plantas azucareras plantas feculentas plantas forrajeras plantas industriales plante plante de culture plante industrielle plante racine plants pomme de terre potatoes productividad productivity produit agrochimique profitability remolacha azucarera rendement rendimiento rentabilidad root crops root vegetables rosales rotational cropping site factors soil amendments soil types sol argileux sol sablolimoneux starch crops suelo arcilloso suelo franco sugar beet sugar crops textural soil types tipos texturales de suelos trigo trigo de invierno type de sol type de sol lithologique type de sol textural vegetable crops wheats winter wheat yields