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Subject is Soils
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View Resource How Wetlands Are Defined and Identified

"Wetlands are areas that are inundated or saturated by surface or ground water at a frequency and duration sufficient to support, and that under normal circumstances do support, a prevalence of...

http://www.epa.gov/owow/wetlands/facts/fact11.html
View Resource Soil Moisture Monitoring: Low-Cost Tools and Methods

Irrigators who monitor soil moisture levels in the field greatly increase their ability to conserve water and energy, optimize crop yields, and avoid soil erosion and water pollution. This...

http://attra.ncat.org/attra-pub/PDF/soil_moisture.pdf
View Resource Conservation Farming in the Slope-Hettinger Soil Conservation District, North Dakota

Reports the results of a soil conservation survey and makes the case for increased conservation efforts. Provides information on identifying land types and suggests simple methods of soil...

http://digital.library.unt.edu/ark:/67531/metadc5956/
View Resource Meadows and Pastures : Formation and Cultivation in the Middle Eastern States.

A guide to the cultivation and selection of varieties of hay, pasture grasses, and clover. Describes the use grass as a soil builder and provides methods of soil improvement. Note: Contents:...

http://digital.library.unt.edu/ark:/67531/metadc6317/
View Resource Soil Biology

A soils primer. Note that many photographs are copyright protected.

http://soils.usda.gov/sqi/concepts/soil_biology/biology.html
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