Biogeochemical prospecting in the south-eastern desert of Egypt

aluminio aluminium balanites aegyptiaca biogeochemistry capparidaceae dysprosium ecologia vegetal egipto egypt geochemistry geochimie hafnium indicator plants manganese manganeso oligoelementos plant ecology plantas indicadoras plante indicatrice scandium selenio selenium soil sol suelo titane titanio titanium trace elements transition elements vanadio vanadium