Search results
Results from the WOW.Com Content Network
A hydric soil is defined by federal law [4] to mean "soil that, in its undrained condition, is saturated, flooded, or ponded long enough during a growing season to develop an anaerobic condition that supports the growth and regeneration of hydrophytic vegetation".
Soils in freshwater marshes are considered hydric; soils that are saturated during the growing season and have anaerobic, or no oxygen, conditions due to the saturation. [12] The soils in freshwater marshes have high organic matter due to slow decomposition rates and are often black or brown.
As part of an integrated waste management system, anaerobic digestion reduces the emission of landfill gas into the atmosphere. Anaerobic digesters can also be fed with purpose-grown energy crops, such as maize. [8] Anaerobic digestion is widely used as a source of renewable energy.
Anaerobic soils are ecologically unique because Earth's atmosphere is oxygenated, while most terrestrial ecosystems and surface waters are aerobic. The anaerobic conditions found in wetland soils result in reduced, rather than oxidized, soil chemistry. [11]
Techniques for improved soil conservation include crop rotation, cover crops, conservation tillage and planted windbreaks, affect both erosion and fertility. When plants die, they decay and become part of the soil. Code 330 defines standard methods recommended by the U.S. Natural Resources Conservation Service. Farmers have practiced soil ...
Obligate anaerobes are found in oxygen-free environments such as the intestinal tracts of animals, the deep ocean, still waters, landfills, in deep sediments of soil. [9] Examples of obligately anaerobic bacterial genera include Actinomyces , Bacteroides , Clostridium , Fusobacterium , Peptostreptococcus , Porphyromonas , Prevotella ...
Following the killing of UnitedHealthcare CEO Brian Thompson and praise for the attack on social media, law enforcement is on high alert as calls for threats against health care executives and ...
Fully water-saturated wetland soils allow anaerobic conditions to manifest, storing carbon but releasing methane. [48] Wetlands make up about 5-8% of Earth's terrestrial land surface but contain about 20-30% of the planet's 2500 Gt soil carbon stores. [49] Peatlands contain the highest amounts of soil organic carbon of all wetland types. [50]