Soil gases (soil atmosphere[1]) are the gases found in the air space between soil components. The spaces between the solid soil particles, if they do not contain water, are filled with air. The primary soil gases are nitrogen, carbon dioxide and oxygen.[2] Oxygen is critical because it allows for respiration of both plant roots and soil organisms. Other natural soil gases include nitric oxide, nitrous oxide, methane, and ammonia.[3] Some environmental contaminants below ground produce gas which diffuses through the soil such as from landfill wastes, mining activities, and contamination by petroleum hydrocarbons which produce volatile organic compounds.[4]
Gases fill soil pores in the soil structure as water drains or is removed from a soil pore by evaporation or root absorption. The network of pores within the soil aerates, or ventilates, the soil. This aeration network becomes blocked when water enters soil pores. Not only are both soil air and soil water very dynamic parts of soil, but both are often inversely related.
^"Soil air" (PDF). Retrieved 16 October 2022.
^Pierzynski, Gary M.; Sims, J. Thomas; Vance, George F., eds. (2005). Soils and environmental quality (3rd ed.). Boca Raton, Florida: CRC Press. Retrieved 16 October 2022.
^Kim, Dong Gill; Vargas, Rodrigo; Bond-Lamberty, Ben; Turetsky, Merritt R. (2012). "Effects of soil rewetting and thawing on soil gas flaxes: a review of current literature and suggestions for future research" (PDF). Biogeosciences. 9 (7): 2459–2483. Bibcode:2012BGeo....9.2459K. doi:10.5194/bg-9-2459-2012. Retrieved 16 October 2022.
^Marrin, Donn L.; Kerfoot, Henry B. (1988). "Soil-gas surveying techniques: a new way to detect volatile organic contaminants in the subsurface". Environmental Science & Technology. 22 (7): 740–745. doi:10.1021/es00172a001. PMID 22195653. Retrieved 23 October 2022.
Soilgases (soil atmosphere) are the gases found in the air space between soil components. The spaces between the solid soil particles, if they do not...
Soil, also commonly referred to as earth or dirt, is a mixture of organic matter, minerals, gases, liquids, and organisms that together support the life...
products in the chemical industry; or measuring chemicals in soil, air or water, such as soilgases. GC is very accurate if used properly and can measure picomoles...
Soil contamination, soil pollution, or land pollution as a part of land degradation is caused by the presence of xenobiotic (human-made) chemicals or other...
Gas gangrene (also known as clostridial myonecrosis) is a bacterial infection that produces tissue gas in gangrene. This deadly form of gangrene usually...
applied to soil or to plant tissues to supply plant nutrients. Fertilizers may be distinct from liming materials or other non-nutrient soil amendments...
Soil aeration is the mechanism of exchange of gases between the atmosphere and soil. Through soil microbial activity and plant root respiration, certain...
CS1 maint: unfit URL (link) "Estimation of Soil Respiration: Improved Techniques for Measurement of SoilGas" Archived 2011-07-07 at the Wayback Machine...
specific wells may be installed for gas inflow (forced or natural). The vacuum extraction of soilgas induces gas flow across a site, increasing the mass...
climate satellite Greenhouse Gases Observing Satellite – Earth observation satellite Soilgas – Gases in the air space between soil components where "part"...
The pore space of soil contains the liquid and gas phases of soil, i.e., everything but the solid phase that contains mainly minerals of varying sizes...
naturally in coal mines Hydric soil Landfill gas, produced incidentally where municipal solid waste is abandoned. Natural gas Sewer gas Wetland methane emissions...
the EPA, agricultural soil management practices can lead to production and emission of nitrous oxide (N2O), a major greenhouse gas and air pollutant. Activities...
The Darvaza gas crater (Turkmen: Garagum ýalkymy), also known as the Door to Hell or Gates of Hell, or, officially, the Shining of Karakum, is a burning...
as well as climate-related factors such as soil temperature and water content. The emission of the gas to the atmosphere is limited greatly by its consumption...
Soil organic matter (SOM) is the organic matter component of soil, consisting of plant and animal detritus at various stages of decomposition, cells and...
managed ecosystems. Soil physics deals with the dynamics of physical soil components and their phases as solids, liquids, and gases. It draws on the principles...
global greenhouse gas emissions. Farm practices such as reducing tillage, decreasing empty land, returning biomass residue of crop to soil, and increasing...
Soil science is the study of soil as a natural resource on the surface of the Earth including soil formation, classification and mapping; physical, chemical...
and the noble gases." Another is the conversion of solid coal into a liquid form usable as a substitute for liquid fuels. In geology, soil liquefaction...
saturated with water due to rainfall and flooding. Gas diffusion in soil slows (some 10,000 times slower) when soil becomes saturated with water because there...
deterioration of rocks, soils and minerals (as well as wood and artificial materials) through contact with water, atmospheric gases, sunlight, and biological...
within. It is used to control pests in buildings (structural fumigation), soil, grain, and produce. Fumigation is also used during the processing of goods...
about 2700 ppmv. Landfill gases can seep out of the landfill and into the surrounding air and soil. Methane is a greenhouse gas, and is flammable and potentially...
to high emissions of radon. Being a rare gas, it usually migrates freely through faults and fragmented soils, and may accumulate in caves or water. Owing...
or a portable hand-held or wearable monitor. Reactive nitrogen species Soilgas "Standard Atomic Weights: Nitrogen". CIAAW. 2009. Prohaska, Thomas; Irrgeher...
void part of the soil volume and is occupied by gases or water. Soil consistency is the ability of soil materials to stick together. Soil temperature and...
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