[Interlaboratory study 1983-1. Chemical analysis of cadmium and phosphorus in commercial fertilizers]

agentes nocivos agricultural chemicals analisis analyse analysis cadmio cadmium contaminantes contaminantes industriales elements engrais engrais npk facteur nuisible fertilizantes fosfatados fertilizantes npk fertilizers fosfatos heavy metals industrial pollutants injurious factors inorganic compounds metal metales metales pesados metals methode methods no metales nonmetals npk fertilizers phosphate phosphate fertilizers phosphate naturel phosphates polluant polluant industriel pollutants produit agrochimique roca fosfatada rock phosphate sales salts sel superfosfato superphosphate