Straw ash as a fertilizer: effects on uptake of heavy metals in agricultural crops

amendement du sol ashes brassica campestris brassica napus cadmio cadmium cendre ceniza cinc cobre copper cuivre cultivos de primavera culture de printemps enmiendas del suelo fertilisation fertilizer application heavy metals hordeum vulgare lactuca sativa lead metales pesados ph pisum sativum plant analysis plant soil relations plomb plomo relaciones planta suelo relation plante sol soil amendments solanum tuberosum spring crops triticum aestivum zinc