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Earthworm Additions Affect Leachate Production and Nitrogen Losses in Typical Midwestern Agroecosystems

^a School of Natural Resources, The Ohio State University, OARDC, Wooster, OH 44691
^b USDA Agricultural Research Service, North Appalachian Experimental Watershed, Coshocton, OH 43812
^c Department of Statistics, University of Illinois, Urbana, IL 61820

View larger version (28K): [in a new window]   Fig. 1. Effects of earthworm treatments on losses of total inorganic nitrogen (TIN) in leachate from cropping systems at the Piketon, Ohio site. Error bars indicate one standard error. The terms *, **, and *** indicate significant differences at the 0.05, 0.01, and 0.001, probability levels, respectively.

View larger version (28K): [in a new window]   Fig. 2. Effects of earthworm treatments on losses of dissolved organic nitrogen (DON) in leachate from cropping systems at the Piketon, Ohio site. Error bars indicate one standard error. The terms *, **, and *** indicate significant differences at the 0.05, 0.01, and 0.001, probability levels, respectively.