[Uptake in ryegrass and spring wheat of trace elements from soil and atmosphere]

agentes nocivos air air pollution aire arsenic arsenico cadmio cadmium cereales cereals chrome chromium cinc contaminantes contaminantes industriales cromo crops cultivos cultivos de grano economic plants elements facteur nuisible feed crops feed grasses gases gaz glumiflorae grain crops gramineae gramineas graminee grasses heavy metals industrial pollutants injurious factors lawn grasses lead lolium lolium perenne metal metales metales pesados metals methode methods monocotyledons nickel ornamental plants physical states plantas plantas forrajeras plantas ornamentales plante plante de culture plante ornementale plants plomb plomo polluant polluant industriel pollutants pollution recherche research semimetales semimetals spring wheat technique des traceurs tracer techniques transition elements trigo trigo de primavera wheats zinc