21 results on '"Matthew J. Helmers"'
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2. Impacts of 4R nitrogen management on drainage water quality
3. Extending field scale 4R nutrient management and wetland performance to watershed scale outcomes
4. Drainage design for improved profits and water quality
5. Meeting the nitrate reduction goal: What will it take?
6. Understanding the 2016 yields and interactions between soils, crops, climate and management
7. Effects of nitrogen application timing and source on nitrate-nitrogen leaching and crop yields
8. Producing food, feed and energy: How can agriculture do it all?
9. Nutrient reduction strategy: One farm, many practices
10. Balancing tillage, soil loss, and profitability
11. Nitrogen, carbon, and phosphorus balances in Iowa cropping systems: Sustaining the soil resource
12. Nitrate loss in subsurface drainage as affected by nitrogen application rate and timing under a cornsoybean rotation system
13. Water quality benefits of perennial filter strips in row-cropped watersheds
14. Tillage, cropping, harvest, and nutrient management systems impacts on phosphorus loss with surface runoff: A research update
15. Impact of application rate and timing on nitrate-nitrogen loss through subsurface drainage systems
16. Effectiveness of variable-width buffer design for sediment reduction
17. Impacts of Extreme Precipitation Events on Performance of Conservation Practices
18. Effects of Cover Crops in Reducing Nitrate-Nitrogen Leaching in Iowa
19. Comparison of Nitrate-Nitrogen in Subsurface Drainage from Continuous Corn and Corn-soybean Rotation
20. Economic and Environmental Considerations for Drainage Design
21. Performance of Vegetative Filters Considering Conservation Practices, Field Slope, and Storm Characteristics
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