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390b031f573aba5a1685d2be81e7f14c1
2010-11-11 12:15:00

Spanish and American researchers have conducted a mineralogical and chemical analysis to ascertain the origin of "terra rossa" soil in the Mediterranean. The results of the study reveal that mineral dust from the African regions of the Sahara and Sahel, which emit between 600 and 700 tons of dust a year, brought about the reddish soil in Mediterranean regions such as Mallorca and Sardinia between 12,000 and 25,000 years ago. "The first hint of the relationship between African dust and certain...

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2010-08-04 09:31:14

Permafrost warming continues throughout a wide swath of the Northern Hemisphere, according to a team of scientists assembled during the recent International Polar Year. Their extensive findings, published in the April-June 2010 edition of Permafrost and Periglacial Processes, describe the thermal state of high-latitude permafrost during the International Polar Year, 2007-2009. Vladimir Romanovsky, a professor with the snow, ice and permafrost group at the University of Alaska Fairbanks...

afac4200b6d4c92e0475fa171e0116651
2010-06-07 09:43:51

A University of Missouri doctoral student has developed a technique that uses digital imaging of soil samples to take some of the guesswork out of wetland identification. Identifying wetlands isn't always easy. The U.S. Army Corps of Engineers' manual on wetlands identification is 143 pages long. Land that is wet isn't necessarily a wetland, and some wetlands aren't always wet. One important tool is looking at the soil for colors and patterns characteristic of frequent and prolonged...

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2010-05-06 09:57:58

Among the worrisome environmental effects of global warming is the thawing of Arctic permafrost---soil that normally remains at or below the freezing point for at least a two-year period and often much longer. Monitoring changes in permafrost is difficult with current methods, but a study by University of Michigan researchers offers a new approach to assessing the extent of the problem. The new study approach, which relies on chemical tracers in stream water, is described in the journal...

2010-04-27 08:00:00

DAVIS, Calif., April 27 /PRNewswire-USNewswire/ -- Today marks the 75th anniversary of a federal landmark in conservation. It was the beginning of a conservation commitment on private land as Congress established the Soil Conservation Service in the U. S. Department of Agriculture, known today as the Natural Resources Conservation Service (NRCS). NRCS has expanded to become a conservation leader in comprehensive natural resource planning and protection on private lands, ensuring they are...

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2010-04-05 10:48:01

A study showed on Sunday that thawing permafrost could release laughing gas, which is a contributor to climate change that has been overlooked in the Arctic, according to a recent Reuters report. The study, which was reported in the journal Nature Geoscience, showed that emissions of nitrous oxide surged under certain conditions from melting permafrost that underlies around 25 percent of land in the Northern Hemisphere. Emissions of the gas leapt 20 times from thawing wetlands in Zackenberg...

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2010-02-17 08:30:00

The southern limit of permanently frozen ground, or permafrost, is now 130 kilometers further north than it was 50 years ago in the James Bay region, according to two researchers from the Department of Biology at Universit© Laval. In a recent issue of the scientific journal Permafrost and Periglacial Processes, Serge Payette and Simon Thibault suggest that, if the trend continues, permafrost in the region will completely disappear in the near future. The researchers measured the retreat...

2010-01-03 08:00:56

Australian scientists have announced the world's first successful large-scale restoration of a coastal wetland being devastated by acid runoff. A dramatic improvement in environmental conditions has been achieved by researchers working on the trial Hills Creek catchment at the East Trinity site near Cairns in Queensland, using a combination of natural tidal action and strategic treatment with lime. Mangrove and wetlands are returning, birdlife is flocking to the area and fish abound in creeks...

2009-11-25 14:08:20

Interactive e-lessons help students understand and appreciate soil's diverse role in the ecosystem. Soil is the linchpin of the environment, where atmosphere, biosphere, and hydrosphere meet. Despite that, many students see soil as "just dirt" "“ a place to grow plants, but nothing more. Soil science educators are challenged with the task of helping students and the public recognize the critical importance of soil in the environment.  A collaborative project by soil science and...

2009-10-23 09:31:43

Thirty million years ago, before Ethiopia's mountainous highlands split and the Great Rift Valley formed, the tropical zone had warmer soil temperatures, higher rainfall and different atmospheric circulation patterns than it does today, according to new research of fossil soils found in the central African nation. Neil J. Tabor, associate professor of Earth Sciences at SMU and an expert in sedimentology and isotope geochemistry, calculated past climate using oxygen and hydrogen isotopes in...


Latest Pedology Reference Libraries

Wetland
2013-04-19 18:19:23

A wetland is an area of land that is saturated with water, either permanently or seasonally, such that it takes on the traits of a distinct ecosystem. First and foremost, the factor that distinguishes the wetlands from other land forms or water bodies is the unique vegetation that has adapted to its characteristic soil conditions. The wetland consists mostly of hydric soil, which is supportive of aquatic plants. The water that is found in wetlands can be saltwater, brackish, or freshwater....

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Word of the Day
toccata
  • In music, a work for a keyboard-instrument, like the pianoforte or organ, originally intended to utilize and display varieties of touch: but the term has been extended so as to include many irregular works, similar to the prelude, the fantasia, and the improvisation.
This word is Italian in origin, coming from the feminine past participle of 'toccare,' to touch.
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