Category:Soil

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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.

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Media in category "Soil"

The following 200 files are in this category, out of 433 total.

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