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Book
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Evaluation of conceptual models of natural organic matter (humus) from a consideration of the chemical and biochemical processes of humification / by Robert L. Wershaw.

R. L Wershaw Geological Survey (U.S.)

Reston, Va. : U.S. Dept. of the Interior, U.S. Geological Survey ; Denver, CO : U.S. Geological Survey, Information Services distributor 2004

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2
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Book
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Managing soil organic matter : the key to air and water quality.

United States. Natural Resources Conservation Service, issuing body. Soil Quality Institute (U.S.), issuing body.

Auburn, AL : Soil Quality Institute 2003

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3
Material Type:
annual
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Biogeochemical processes influencing formation and stabilization of soil organic matter and soil structure ... annual report.

Soil Resource Management National Program (U.S.); United States. Agricultural Research Service.

Washington, D.C. : U.S. Dept. of Agriculture, Agricultural Research Service 2006

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4
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Book
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Rangeland soil quality - organic matter / USDA, Natural Resources Conservation Service.

United States. Natural Resources Conservation Service, issuing body.; Soil Quality Institute (U.S.), author.; Grazing Lands Technology Institute (U.S.), author.; National Soil Survey Center (U.S.), author.

Auburn, Ala. : USDA, Natural Resources Conservation Service 2001

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