Metallic ions and fertilization, 1: Pb, Cd and Hg in complex (NPK) fertilizers
1987
Rico Salas, M.I. (Universidad Politecnica de Madrid (Spain). Escuela Tecnica Superior de Ingenieros Agronomos) | Garcia Martitegui, J. | Mateo Lopez, J.M.
Ninety samples of complex (NPK) fertilizers used in Spain have been analyzed, as well as a reduced number of phosphorites, superphosphates and non-phosphoric fertilizers samples to be compared with the previous ones. In general, no detectable quantities of Hg have been found; Pb and Cd were present in variable amounts, the latter related to phosphorous content in samples containing phosphorites
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