Lewis et al in Global Change Biology (2006) found that residential soil levels can be impacted from prior land use for up to 40 years later. This might explain why many residences in the southern U.S. have elevated P levels on former agricultural lands. The authors compared former agriculture lands with natural lands and found significant soil differences. They term this a ‘direct agrarian legacy.’ How many other legacies are out there?
Lewis, Kaye, Gries, Kinzig, and Redman. 2006. Agrarian legacy in soil-nutrient pools of urbanizing arid lands. Global Change Biology 12:703-709.
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