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Free Picture: Collecting a Sample


Free Picture of Collecting a Sample

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Description
Keith Weller image of technician Jeff Nichols collecting a sample from the Walnut Creek watershed in Ames, Iowa, for analysis. Thirty years of data from many U.S. watersheds went into constructing the computer model called SWAT, used to predict the effects of farming practices on water quality. Water samples are still being collected weekly to validate the model.

Keywords
ars, dept of agriculture, iowa, jeff nichols, man, men, one man, one person, people, person, technician, technicians, us department of agriculture, walnut creek watershed, watershed, department of agriculture,  free photography,  free photo,  free photos,  free picture,  free pictures,  free image,  free images

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