Project ID

E2010-02

Abstract

Comparisons were made among contrasting cropping systems within a long-term, large-scale field experiment in Boone County, Iowa. Combining crop diversity with lower herbicide inputs and non-transgenic crops was effective in reducing requirements for nitrogen fertilizer; maintaining or improving weed suppression, grain yields, and profi ts; and increasing several soil quality indicators.

Key Question

How do cropping system diversity and contrasting technology packages of crop genetics and herbicide inputs affect agrichemical use, crop performance, weeds, soil quality and function and profitability?

Findings

Comparisons were made among contrasting cropping systems within a long-term, large-scale field experiment in Boone County, Iowa. Combining crop diversity with lower herbicide inputs and non-transgenic crops was effective in reducing requirements for nitrogen fertilizer; maintaining or improving weed suppression, grain yields, and profits; and increasing several soil quality indicators.

Principal Investigator(s)

Matt Liebman

Co-Investigator(s)

Criag Chase, Michelle Wander, Mark Tomer

Year of Grant Completion

2013

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