Soil health is the continued capacity of the soil to function as a vital living system, within ecosystem and land-use boundaries, to sustain biological productivity, promote the quality of air and water environments, and maintain plant, animal, and human health.

Source:

“Status of the World's Soil Resources. Main Report |Policy Support and Governance| Food and Agriculture Organization of the United Nations .” Food and Agriculture Organization of the United Nations (FAO) and Intergovernmental Technical Panel on Soils (ITPS), 2015.