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Researchers have found that rust-coated irrigation pivots could signal an absence of nitrate in nearby groundwater — and position them as a guidepost when monitoring for the contaminant, which has been linked with birth defects and cancers.
Researchers have found that rust-coated irrigation pivots could signal an absence of nitrate in nearby groundwater — and position them as a guidepost when monitoring for the contaminant, which has been linked with birth defects and cancers.