Project ID

E2003-07

Abstract

The Water Erosion Prediction Project (WEPP) model was used to estimate the effects that harvesting corn residue would have on soil erosion. The erosion at different crop residue removal rates was compared on different soils and on different slopes.

Key Question

What rates of corn stover can be harvested from Iowa soils without excess erosion?

Findings

High rates of stover removal are possible on gentle slopes with no-till management or extended crop rotations that include perennial crops. On steep slopes, more intensive tillage systems (moldboard plow or even minimum tillage) are not sustainable in corn-bean rotations regardless of biomass removal rates.

Principal Investigator(s)

Tom Richard

Co-Investigator(s)

Amber D. Hasche Widman

Year of Grant Completion

2009

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