JEQ Journal of Natural Resources and Life Sciences Education
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Fig. 2. Frequencies of herbicide detection in ground water from 1993 to 1995, by study component, during the NAWQA investigation. Numbers of sites sampled for acetochlor given in brackets. LUSs, land-use studies; SUSs, subunit surveys.





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The SCI Journals Agronomy Journal Crop Science
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Journal of Natural Resources
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