| http://www.w3.org/ns/prov#value | - trace metals, while the lab???s nutrient analyzer tests for such concentrations as nitrates, phosphates, and ammonia, which could hint at pollution from agricultural operations.Researchers also look for dissolved organic and inorganic carbons, and through radiocarbon dating can tell whether particles of a leaf have been in the Fraser for weeks or hundreds of thousands of years.All are designed to
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