History of Ontario Farm Drainage Association
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Date Issued
1987-01-01
1980-1989
Minnesota Drainage Guide
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Date Issued
1984-09-01
Drainage Factsheet What to expect from your drainage contractor
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Date Issued
1984-10-01
Understanding Nitrogen and Agricultural Chemicals in the Environment
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Date Issued
1987
Final Report of the Citizens Panel on Agriculture and Water Quality
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Date Issued
1985-01
Analysis Of Regional Patterns In Lake Water Quality: Using Ecoregions For Lake Management In Minnesota
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Date Issued
1987
