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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.
Content date:
not specified
Citation:
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 Online Linkages:
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The Conservation Biology Institute (CBI) provides scientific expertise to support the conservation and recovery of biological diversity in its natural state through applied research, education, planning, and community service.