27 - 28.page04 - Wetter more OM Fastest OM...

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NRES 201 Inro to Soil Science Lec. 27-28 Soil Organic Matter Ch. 11 3/13/2007 4 Decomposition Rate of Different C/N Materials Decomposition Rate of Different C/N Materials Geography of Soil OM Geography of Soil OM - Organic matter is added to surface and near surface horizons, gives topsoil dark color - Cooler, more OM
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Unformatted text preview: - Wetter, more OM - Fastest OM degradation (irrigated desert)- Slowest OM degradation- cool northern soil Where is the Carbon (OM) in soil? Where is the Carbon (OM) in soil?- Amount? - Vegetation- Climate- Topography- Distribution - Vegetation- Illuviation (leaching)- Oxidation status...
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