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The Aggregate Stability Comparison display, (left) using two clear pipes with water, demonstrate the structural stability of healthy soil that has organic matter from cover crops and aeration created by worms and roots, verses soil that is mechanically tilled on a regular basis and falls apart in water, during the U.S. Department of Agriculture (USDA) Natural Resources Conservation Service (NRCS soil health demonstration event “The Bundled Benefits of Soil Health” on Thursday, September 18, 2014 in the People’s Garden,at the USDA headquarters, in Washington, D.C. USDA Photo by Lance Cheung.

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