University of Minnesota Extension's Online Drainage Calculator
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Date Issued
2017 (year uncertain)
University of Minnesota Extension
iGrow's Drainage Calculators
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Date Issued
2017 (year uncertain)
Ten Points to Consider When Planning an Agricultural Drainage System
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Date Issued
2010 to 2017
Technical, Planning and Design Pumped outlets for subsurface drainage
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Date Issued
2017 (year uncertain)
Issues and Answers
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Date Issued
2002 (year uncertain)
