Five of the top ten problems facing humanity (http://cnst.rice.edu/content.aspx?id=246) over the next 50 years (food, water, energy, environment and poverty) are directly related to the health of soil resources. Several different factors, including: (a) excessive tillage; (b) inappropriate crop rotations; (c) excessive grazing or crop residue removal; (d) deforestation; (e) mining and/or fracking; and (f) construction or urban sprawl, have contributed to the global problem of soil degradation. Understanding and implementing sustainable...