HWSD Soil Quality - Global constraints due to oxygen availability

Jul 12, 2010
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Description:
Oxygen availability in soils is largely defined by drainage characteristics of soils. The determination of soil drainage classes is based on procedures developed at FAO (FAO 1995). These procedures take into account soil type, soil texture, soil phases and terrain slope.

Apart from drainage characteristics, the soil quality of oxygen availability may be influenced by soil and terrain characteristics that are defined through the occurrence of specific soil phases. These include for the FAO 74 classification soil phases indicating phreatic conditions, and for the FAO 90 classification soil phases indicating respectively phreatic, anthraquic, inundic, or placic conditions.

Soil qualities have been estimated for the sequence 1 soils in each grid cell with as reference crop maize. The derived maps for the individual soil qualities represent therefore the qualities of main soils only.
Data Provided By:
Fischer, G., F. Nachtergaele, S. Prieler, H.T. van Velthuizen, L. Verelst, D. Wiberg, 2008. Global Agro-ecological Zones Assessment for Agriculture (GAEZ 2008). IIASA, Laxenburg, Austria and FAO, Rome, Italy.
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Title: HWSD Soil Quality - Global constraints due to oxygen availability
Credits: Fischer, G., F. Nachtergaele, S. Prieler, H.T. van Velthuizen, L. Verelst, D. Wiberg, 2008. Global Agro-ecological Zones Assessment for Agriculture (GAEZ 2008). IIASA, Laxenburg, Austria and FAO, Rome, Italy.
Publication Date: 2008
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Creative Commons LicenseThis work is licensed under a Creative Commons Attribution 3.0 License.
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soil ph, soil drainage, soil organic carbon, total exchangeable bases, soil phases, world soil database, soil texture
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