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((ars OR "agricultural research") AND (benchmark? OR stewards) OR ("beasley lake" OR "choptank river" OR "goodwin creek" OR "leon river" OR "little river" OR "north walnut creek" OR "st. joseph river" OR "salt river" OR "mark twain" OR ("south fork" AND "iowa") OR "town brook" OR "upper big Walnut creek" OR "upper washita river" OR "yalobusha river" OR "mahantango creek" OR "goodwater creek") NOT grape?)
Remove constraint All Fields: ((ars OR "agricultural research") AND (benchmark? OR stewards) OR ("beasley lake" OR "choptank river" OR "goodwin creek" OR "leon river" OR "little river" OR "north walnut creek" OR "st. joseph river" OR "salt river" OR "mark twain" OR ("south fork" AND "iowa") OR "town brook" OR "upper big Walnut creek" OR "upper washita river" OR "yalobusha river" OR "mahantango creek" OR "goodwater creek") NOT grape?)
Format
Electronic
Remove constraint Format: Electronic
Publish Date
1997
Remove constraint Publish Date: 1997
Format
Article OR Electronic
Remove constraint Format: Article <strong class='text-muted constraint-connector'>OR</strong> Electronic