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Sustainability 2015, 7(3), 2936-2960;

North American Soil Degradation: Processes, Practices, and Mitigating Strategies

USDA-Agricultural Research Service, Conservation and Production Research Lab., P.O. Drawer 10, Bushland, TX 79012, USA
Dryland Agriculture Institute, West Texas A&M University, P.O. Box 60278, Canyon, TX 79016, USA
USDA-Agricultural Research Service, Northern Plains Agricultural Research Lab., 1500 North Central Avenue, Sidney, MT 59270, USA
Author to whom correspondence should be addressed.
These authors contributed equally to this work.
Academic Editor: Marc A. Rosen
Received: 14 November 2014 / Revised: 23 February 2015 / Accepted: 27 February 2015 / Published: 11 March 2015
(This article belongs to the Special Issue Enhancing Soil Health to Mitigate Soil Degradation)
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Soil can be degraded by several natural or human-mediated processes, including wind, water, or tillage erosion, and formation of undesirable physical, chemical, or biological properties due to industrialization or use of inappropriate farming practices. Soil degradation occurs whenever these processes supersede natural soil regeneration and, generally, reflects unsustainable resource management that is global in scope and compromises world food security. In North America, soil degradation preceded the catastrophic wind erosion associated with the dust bowl during the 1930s, but that event provided the impetus to improve management of soils degraded by both wind and water erosion. Chemical degradation due to site specific industrial processing and mine spoil contamination began to be addressed during the latter half of the 20th century primarily through point-source water quality concerns, but soil chemical degradation and contamination of surface and subsurface water due to on-farm non-point pesticide and nutrient management practices generally remains unresolved. Remediation or prevention of soil degradation requires integrated management solutions that, for agricultural soils, include using cover crops or crop residue management to reduce raindrop impact, maintain higher infiltration rates, increase soil water storage, and ultimately increase crop production. By increasing plant biomass, and potentially soil organic carbon (SOC) concentrations, soil degradation can be mitigated by stabilizing soil aggregates, improving soil structure, enhancing air and water exchange, increasing nutrient cycling, and promoting greater soil biological activity. View Full-Text
Keywords: soil erosion; compaction; salinization soil erosion; compaction; salinization

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Baumhardt, R.L.; Stewart, B.A.; Sainju, U.M. North American Soil Degradation: Processes, Practices, and Mitigating Strategies. Sustainability 2015, 7, 2936-2960.

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