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Severe soil erosion in a wheat field near Washington State University. Photo by Jack Dykinga. Image Number K5951-1 Source: http://www.ars.usda.gov/is/graphics/photos/k5951-1.htm {{PD-US}} Category:Soil science http://commons.wikimedia.org/wiki/I
Severe soil erosion in a wheat field near Washington State University.
Photo by Jack Dykinga.
Image Number K5951-1
Source: http://www.ars.usda.gov/is/graphics/photos/k5951-1.htm
{{PD-US}}
[[Category:Soil science]]
http://commons.wikimedia.org/wiki/Image:Soil_erosion1.jpgv
Photo by Jack Dykinga.
Image Number K5951-1
Source: http://www.ars.usda.gov/is/graphics/photos/k5951-1.htm
{{PD-US}}
[[Category:Soil science]]
http://commons.wikimedia.org/wiki/Image:Soil_erosion1.jpgv