Ekofert, ecological and economic contribution to contemporary Slovak agriculture

abonos organominerales amendement organique application rates arsenic arsenico avena sativa beta vulgaris cadmio cadmium chemical composition chrome chromium composition chimique cromo cultivos de primavera culture de printemps dose d'application essai fertilidad del suelo gladiolus helianthus annuus hordeum vulgare lead lignite lignito mercure mercurio mercury organic amendments organomineral fertilizers pisum sativum plomb plomo pruebas residues residuos soil fertility soil sorption solanum tuberosum sorption du sol spring crops trials trifolium pratense vicia faba zea mays