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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...

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2009-10-02 08:06:42

TAU's "soil dipstick" forecasts the health of farms, forests and the planet According to climate change experts, our planet has a fever "” melting glaciers are just one stark sign of the radical changes we can expect. But global warming's effects on farming and water resources is still a mystery. A new Tel Aviv University invention, a real-time "Optical Soil Dipstick" (OSD), may help solve the mystery and provide a new diagnostic tool for assessing the health of our planet. According to...

2009-08-31 16:41:59

The U.S. National Institute of Standards and Technology has certified three new reference materials for soil testing by laboratories. Officials said the new standard reference materials -- gathered from the San Joaquin Valley in California and from sites near Butte and Helena in Montana -- are designed to aid in determining soil quality, detecting soil contamination and monitoring cleanup efforts from accidental spills or atmospheric deposition. The NIST created its first batch of sample...


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
bibliopole
  • A bookseller; now, especially, a dealer in rare and curious books.
This word comes from a Greek phrase meaning 'book seller.'
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