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Project ID: E2010-02Abstract
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?
Lead investigator: Matt Liebman, ISU Agronomy
Year of grant completion: 2013
This competitive grant project was part of the Leopold Center's Ecology Initiative.Topics: Multi-year rotations, low-external input, Soils and agronomy