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Soil Compaction, Corn Yield Response, and Soil Nutrient Pool Dynamics within an Integrated Crop-Livestock System in Illinois

^a Dep. of Crop, Soil and Environmental Sciences, Virginia Polytechnic Institute and State Univ., Blacksburg, VA 24061
^b Dep. of Crop Sciences, Univ. of Illinois, Urbana, IL 61801

View larger version (7K): [in this window] [in a new window]   Figure 1. Schematic diagram of integrated farming system used in the experiment showing the four treatments. The farming system is replicated three times across the study site. C-O-P, corn–oats–pasture treatment; CSP, cool-season grass pasture; WSP, warm-season grass pasture; CC, continuous corn.

View larger version (13K): [in this window] [in a new window]   Figure 2. Estimated corn grain yield from 2004 to 2006 in continuous corn and cropland pasture (C-O-P) plots.

View larger version (13K): [in this window] [in a new window]   Figure 3. Trends in total soil C over the four year study period. C-O-P, corn–oats–pasture treatment; CSP, cool-season grass pasture; WSP, warm-season grass pasture; CC, continuous corn. LSD values are given for each year to compare treatments.