| geochemistry of trace elements in paddy (rice) soils of sri lanka--implications for iodine deficiency disorders (idd). | iodine deficiency disorders (idd) are a common health problem prevalent in the wet zone of sri lanka with a prevalence of >25% of the population. in comparison, in the dry zone of sri lanka idd occurs in <10% of the population. seventy soil samples from 14 villages selected on the basis of the incidence of goitre, were collected and analysed for 13 trace elements using icp-ms. in order to identify any prevailing differences in antecedent chemical environments, soil samples from each pre-selected ... | 2005 | 15688131 |