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PAGC - Percentage of cropland The percentage of cropland cover is calculated by dividing the
number of cropland land cover cells in the 1 km grid cell reporting
unit by the total number cells in the grid cell boundary minus those
cells classified as water (total land area). Agricultural practices
typically employ fertilizers, pesticides and other chemicals that
may be transported to streams in water runoff. The closer agriculture
is to a stream the more likely related pollutants will enter the
stream. Concentrations of pollutants transported into streams are
also more likely to be higher when agriculture is closer to streams. |