Technician Jeff Nichols collects a water sample from the Walnut Creek Watershed in Ames, Iowa. Samples are collected weekly form this area and surrounding watersheds to study the effects farming practices have on water quality.
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TOP22081721
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達志影像
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RM
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agriculturalagriculturalagricultureagricultureandandcollectingcollectioncollectioncreekfarmingfieldiowapracticesqualityqualityqualityresearchresearchresearchresearchresearchresearcherresearchersresearchingsamplesamplesamplesamplessamplessamplingstudytechniciantechnicianswalnutwaterwaterwaterwaterwaterwaterwaterwaterwaterwatershedwatershedwatersheds