The Role of Drainage Depth and Intensity on Hydrology and Nutrient Loss in the Northern Corn-Belt

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Why Are We Concerned About Nutrient Loss and Tile Drainage?

Water management in the crop root-zone is crucial to successful crop growth and production. Irrigation, surface, and subsurface drainage—and other practices—are routinely implemented throughout the world to improve crop productivity and working conditions of the soil.…

Swine Manure & Aqua-ammonia Nitrogen Application Timing on Subsurface Drainage Water

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Abstract

In Iowa and many other Midwestern states, excess water is removed artificially through subsurface drainage systems.  While these drainage systems are vital for crop production, nitrogen (N) added as manure or commercial fertilizer, or derived from soil organic matter, can be carried as nitrate-nitrogen (NO3-N) to downstream water bodies. …