Category:Soil
https://en.wikipedia.org/wiki/Soil_biology
Soil biology is the study of microbial and faunal activity and ecology in soil. Soil life, soil biota, soil fauna, or edaphon is a collective term that encompasses all the organisms that spend a significant portion of their life cycle within a soil profile, or at the soil-litter interface. These organisms include earthworms, nematodes, protozoa, fungi, bacteria and different arthropods. Soil biology plays a vital role in determining many soil characteristics. The decomposition of organic matter by soil organisms has an immense influence on soil fertility, plant growth, soil structure, and carbon storage. As a relatively new science, much remains unknown about soil biology and their effects on soil ecosystems.
The soil is home to a large proportion of the world's biodiversity. The links between soil organisms and soil functions are observed to be incredibly complex. The interconnectedness and complexity of this soil ‘food web’ means any appraisal of soil function must necessarily take into account interactions with the living communities that exist within the soil. We know that soil organisms break down organic matter, making nutrients available for uptake by plants and other organisms. The nutrients stored in the bodies of soil organisms prevent nutrient loss by leaching. Microbial exudates act to maintain soil structure, and earthworms are important in bioturbation. However, we find that we don't understand critical aspects about how these populations function and interact. The discovery of glomalin in 1995 indicates that we lack the knowledge to correctly answer some of the most basic questions about the biogeochemical cycle in soils. We have much work ahead to gain a better understanding of how soil biological components affect us and the biosphere...
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Soil Science Resources
http://resources.arcgis.com/en/communities/soils/02ms00000006000000.htm Soils Orders Mapping / US
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The 12 soil orders are listed below in the sequence in which they key out in Soil Taxonomy / see international location mapping for each
- Gelisols - soils with permafrost within 2 m of the surface
- Histosols - organic soils
- Spodosols - acid forest soils with a subsurface accumulation of metal-humus complexes
- Andisols - soils formed in volcanic ash
- Oxisols - intensely weathered soils of tropical and subtropical environments
- Vertisols - clayey soils with high shrink/swell capacity
- Aridisols - CaCO3-containing soils of arid environments with subsurface horizon development
- Ultisols - strongly leached soils with a subsurface zone of clay accumulation and <35% base saturation
- Mollisols - grassland soils with high base status
- Alfisols - moderately leached soils with a subsurface zone of clay accumulation and >35% base saturation
- Inceptisols - soils with weakly developed subsurface horizons
- Entisols - soils with little or no morphological development
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http://server.arcgisonline.com/ArcGIS/rest/services/Specialty/Soil_Survey_Map/MapServer
http://www.arcgis.com/home/item.html?id=204d94c9b1374de9a21574c9efa31164
Subcategories
This category has the following 7 subcategories, out of 7 total.
Pages in category "Soil"
The following 46 pages are in this category, out of 46 total.
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Media in category "Soil"
The following 5 files are in this category, out of 425 total.
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