Research Results

Water Quality

These projects have been supported by the Leopold Center. Click on a project name to read a printable summary of the key findings and other details. Full final reports are available from the Leopold Center by request.

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Project Name [PDF] Project ID
NEW The role of herbaceous woodland perennial diversity for improving nutrient uptake of riparian areas One-page brief Full summary E2006-03
NEW Quantifying the role of riparian management to control nonpoint source pollution of pasture and cropland streams One-page brief Full summary E2004-24
NEW Effects of biomass harvest on soil erosion One-page brief Full summary E2003-07
Impacts of managed grazing on stream ecology and water quality   U19-2002
The role of herbaceous woodland perennial diversity for improving nutrient uptake capacity of riparian areas   E04-2004
Economically sustainable riparian buffer to promote bank stability and reduce gully erosion and phosphorus runoff in the Loess Hills   E30-2002
Evaluating the effectiveness of restored wetlands for reducing nutrient losses from agricultural watersheds   2001-60
Understanding the potential of phosphorus transport to water resources via leaching   2002-40
Soil carbon quality and interactions in Iowa wetlands   2001-47
Environmental impacts of the use of poultry manure for agricultural production systems   1999-68A
Environmental impacts of use of poultry manure on water quality   1999-68B
Toxicity of pesticides adsorbed to suspended sediment to larval fish in the Cedar River   1998-80
Constructed wetlands to reduce agricultural chemical transport to water resources   1995-48
Impacts of swine manure application and alternative N-management practices on productivity, sustainability and water quality   1997-60
Long-term holistic study of two Iowa watersheds   1995-AGRO
Effect of tillage, crop rotation and innovative nitrogen and pesticide management practices on productivity, sustainability and water quality   1993-14
Prediction and field validation of sediment impacts on riffle insect communities   1992-29
Buffer strips for controlling herbicide losses   1991-15
Sustainable tree-shrub-grass buffer strips along waterways   1990-07
Evaluation of tillage and crop rotation effects on groundwater quality   1990-41
Transformation and fate of nitrate and atrazine in freshwater wetlands   1990-63
Pesticides and their major degradation products as potential contaminants of groundwater   1990-39
Multispecies toxicity tests using indigenous stream organisms: predicting pesticide effects in streams   1990-37
Effectiveness of vegetative filter strips   1990-09
Storm Lake watershed demonstration project: planning phase   1990-36
Implementing nitrogen management to protect Iowa's groundwater   1990-28
Efficient herbicide application to reduce environmental losses   1989-22
Establishment of an experimental wetland research complex   1989-40
Nitrogen efficiency with no-till and conventional tillage cropping systems for energy conservation and water quality benefits   1988-20
Nitrate and herbicide leaching as affected by conservation tillage   1988-02
Effect of split N-fertilizer applications on drainage water quality and No3-N leaching   1988-07
Tillage and crop rotation system demonstration for energy and environmental efficiency   1988-10

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