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Published online 29 September 2005
Published in Soil Sci Soc Am J 69:1746-1756 (2005)
DOI: 10.2136/sssaj2005.0020
© 2005 Soil Science Society of America
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Right arrow Grazing Management
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Soil Organic Carbon Composition in a Northern Mixed-Grass Prairie

Effects of Grazing

Girisha K. Ganjeguntea, George F. Vancea,*, Caroline M. Prestonb, Gerald E. Schumanc, Lachlan J. Ingrama, Peter D. Stahla and Jeffrey M. Welkerd

a Dep. of Renewable Resources, 1000 E. University Ave., Univ. of Wyoming, Laramie, WY 82071-3354
b Canadian Forest Service, Natural Resources Canada, Pacific Forestry Centre, 506 West Burnside Rd., Victoria BC, Canada V8Z 1M5
c USDA-ARS, High Plains Grasslands Research Station, Rangeland Resource Research Unit, 8408 Hildreth Rd., Cheyenne, WY 82009
d Environment and Natural Resource Institute, Univ. of Alaska, 3211 Providence Dr., Anchorage, AK 99508



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  		Fig. 1. Concentrations of phenylpropanoid moieties (mg kg–1 soil) in soils under three grazing treatments at the High Plains Grasslands Research Station, Cheyenne, WY.

 


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  		Fig. 2. Concentrations of phenylpropanoid moieties (g VSC kg–1 humic acid C or fulvic acid C) in humic acids and/or fulvic acid under three grazing treatments at the High Plains Grasslands Research Station, Cheyenne, WY.

 


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  		Fig. 3. Carbon-13 cross polarization magic angle spin nuclear magnetic resolution (13C CPMAS NMR) spectra of humic and fulvic acid extracted from three grazing treatments at the High Plains Grasslands Research Station, Cheyenne, WY.

 


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  		Fig. 4. Dipolar dephasing carbon-13 cross polarization magic angle spin nuclear magnetic resolution (13C CPMAS NMR) spectra of humic and fulvic acids extracted from three grazing treatments (one of each replicate) at the High Plains Grasslands Research Station, Cheyenne, WY.

 




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