Definition of. (ls, ls, ls) A very fine grained silt or clay, thought to be deposited as dust blown by the wind. All content on this website, including dictionary, thesaurus, literature, geography, and other reference data is for informational purposes only. Soil properties across Louisiana vary considerably as well. When glaciers grind rocks to a fine powder, loess can form. 1. Login . Aeolian soil Sediments deposited by wind (eg, loess). In some parts of the world, windblown dust and silt blanket the land. Loam Soils LOESS combines much of the simplicity of . Particles 0.010.05 mm in size predominate; clay particles smaller than 0.005 mm are present in an amount of 530 percent. https://encyclopedia2.thefreedictionary.com/Loess+soil. Ls, zengin, toz benzeri bir toprak olarak tanmlanabilir. To save this word, you'll need to log in. Loess (pronounced "luss"), is German for loose or crumbly. Loess is the source of most of our Nation's rich agricultural soils and is common in the U.S. and around the world. Loess is a sedimentary deposit originated by wind.El loess es un depsito sedimentario de origen elico. Yellow RiverThe Yellow River gets its name from the yellow loess suspended in the water. It generally occurs in arid, semi-arid and semi-humid regions, mainly due to excessive depletion of deep soil water by vegetation, evapotranspiration and scarce precipitation recharge over a long. An essentially unconsolidated, unstratified calcareous silt; commonly it is homogeneous, permeable, and buff to gray in color, and contains calcareous concretions and fossils. The production area has sandy soils and, in the south-east, loamy and loess soils. 1996 - 2022 National Geographic Society. ess (ls, ls, ls) A very fine grained silt or clay, thought to be deposited as dust blown by the wind. These example sentences are selected automatically from various online news sources to reflect current usage of the word 'loess.' How to use a word that (literally) drives some pe Editor Emily Brewster clarifies the difference. loess soil. Moderate. loess a fine-grained windblown silt that is characteristic of temperate areas where thick layers of it were distributed during the retreat of the ice after the last glaciation. Loess can be described as a rich, dust-like soil. When blown by the wind, these sediments are referred to as. Loess soils are among the most fertile in the world principally because the abundance of silt particles ensures a good supply of plant-available water good soil aeration extensive penetration by plant roots and easy cultivation and seedbed production. A buff to gray windblown deposit of fine-grained, calcareous silt or clay. Study with Quizlet and memorize flashcards containing terms like Loess has a very low content of what size of mineral particles?, 2 Ways that organic matter has an influence on soil development?, What are the 5 soil forming factors? loess (German) n a light-coloured fine-grained accumulation of clay and silt particles that have been deposited by the wind (C19: from German Lss, from Swiss German dialect lsch loose) loessial loessal loessal Streams carry the powder to the end of the glacier. a light-coloured fine-grained accumulation of clay and silt particles that have been deposited by the wind, (2007), for instance, reported significant no tillage and residue cover effects (reducing runoff and soil loss by 34% and 62%, respectively) from rainfall simulation experiments in the drier western loess areas of Gansu province, and Liang (1997) showed the effectiveness of cover in protecting the, Xiubin H, Zhanbin H (2001) Zeolite application for enhancing water infiltration and retention in, These were a pumice (loamy sand), argillite (loam), ash (sandy clay loam), and, Plant response to topsoil thickness and to fertilizer on an eroded, Plant response to topsoil thickness on uneroded, Characteristics of the development of collapse in, In contrast, the total content of Cd, Cr, Mn and Zn was found to be significantly greater (p<0.05) in piedmont soils than alluvium and, Reduced tillage increased OC and N content of the surface soil layer (0-100 mm) in 6 of 7 silt. Albero Synonymous with albariza. Sources can be local or distant, resulting in local variations in loess. The STANDS4 Network . Loess. Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/loess. Meaning of loess. Find 38 ways to say LOESS, along with antonyms, related words, and example sentences at Thesaurus.com, the world's most trusted free thesaurus. In terms of its composition loess is usually classified as a loam or, more rarely, as a sandy loam. noun 0 1 Most loess is believed to have originated during the Pleistocene Epoch from areas of land covered by glaciers and from desert surfaces. 0 rating. 4. Earth Science, Geography, Physical Geography. After wetting, the loess is often compacted under the pressure of its own weight or the weight of structures, and the ground subsides, which can cause severe damage to structures. Loess form when the wind deposits clay and silt. Most loess is believed to have originated during the Pleistocene Epoch from areas of land covered by glaciers and from desert surfaces. If you have questions about how to cite anything on our website in your project or classroom presentation, please contact your teacher. 1833 (in Lyell), "unstratified deposit of loam," a special use from 1823 by German mineralogist Karl Csar von Leonhard (1779-1862) of German Lss "yellowish-gray soil," of a type found in the Rhine valley, from Swiss German lsch (adj.) The Rights Holder for media is the person or group credited. More dust slowly accumulates, and loess is formed.Loess often develops into extremely fertile agricultural soil. Coarse silt particles (10-50 m in diameter) make 40-70% of typical loess by weight. All content on this website, including dictionary, thesaurus, literature, geography, and other reference data is for informational purposes only. If a media asset is downloadable, a download button appears in the corner of the media viewer. Vulnerable to water erosion. loess. Most loess is believed to have originated during the Pleistocene Epoch from areas of land covered by glaciers and from desert surfaces. Wind erosion can be prevented by keeping the ground covered with plants. It crumbles easily; in fact, the word loess comes from the German word for loose. Loess is soft enough to carve, but strong enough to stand as sturdy walls. mica noun type of mineral that can be split into thin, see-through sheets. Accessed 4 Nov. 2022. Generally speaking, the soils are slightly to moderately acidic, owing to the large annual rainfall. https://medical-dictionary.thefreedictionary.com/Loess+soil, Usowicz, "Evaluation of soil-loss contribution areas on, Because of the interaction between moisture and air, the unsaturated infiltration properties of, (2008) found that K was overestimated by Eqn (1) for, Seasonal variations in rill erodibility for a, Soil type at the Shouyang site is Chestnut-Cinnamon, Observations on earthworm channels and infiltration on tilled and untilled, Silicon release during NaOH extraction of all, Corn grain yield response to topsoil depth on deep, Not so with the shrubs that struggle to survive outside the watershed in the semi-arid, loose, Plant response to topsoil thickness on an eroded, Dictionary, Encyclopedia and Thesaurus - The Free Dictionary, the webmaster's page for free fun content, The effect of land use change on transformation of relief and modification of soils in undulating loess area of east Poland, Field Experiment on Soaking Characteristics of Collapsible Loess, Soil erodibility affected by vegetation restoration on steep gully slopes on the Loess Plateau of China, Temporal variability in rill erodibility for two types of grasslands, Traffic and tillage effects on runoff and soil loss on the Loess Plateau of northern China, Water infiltration rates following reintroduction of Lumbricus terrestris into no-till fields, Testing a new method for sequential silicon extraction on soils of a temperate--humid climate, Field-scale watershed evaluations on deep-loess soils: I. Topography and agronomic practices, Runoff and sediment yield under simulated rainfall on hillslopes in the Loess Plateau of China, Effects of zeolite application on nitrate and ammonium retention of a loamy soil under saturated conditions, Soil erosion - crop productivity relationships for six Alberta soils, Loewenstein Occupational Therapy Cognitive Assessment, Loffler parietal fibroplastic endocarditis. REFERENCES When glaciers grind rocks to a fine powder, loess can form. W. G. Hale, V. A. Saunders, J. P. Margham 2005 As the distance from the source increases, the grains size deposited decreases. . A very fine grained silt or clay, thought to be deposited as dust blown by the wind. organic adjective loess a fine-grained windblown silt that is characteristic of temperate areas where thick layers of it were distributed during the retreat of the ice after the last glaciation. When you reach out to him or her, you will need the page title, URL, and the date you accessed the resource. Abstract Loessification is a process by which a body of non-loess ground is transformed into a body of loess ground. (v. Santosa. Missouri River noun (4,382 kilometers/2,723 miles) river in the western United States. Properties of Loess. Soil organic carbon on the fragmented Chinese Loess Plateau: combining effects of vegetation types and topographic positions. Till Niermann. Intact loess features a random particle arrangement, high porosity, and significant number of macropores [ 19, 20 ]. loess soil. moisture noun wetness. Geology. (n.) A mixture of sand, clay, and other materials, used in making molds for large castings, often without a pattern. Alkaline soil Any soil that has a pH of more than 7 . It is a gritty, lightweight, porous material composed of tightly packed grains of quartz, feldspar, mica, and other minerals. Definition of loess. Very easy. Record the pronunciation of this word in your own voice and play it to listen to how you have pronounced it. Collins Dictionary of Biology, 3rd ed. Thesaurus: All synonyms and antonyms for loess, Britannica.com: Encyclopedia article about loess. As nouns the difference between loam and loess is that loam is a type of soil; an earthy mixture of sand, silt and clay, with organic matter to which its fertility is chiefly due while loess is (geology) any sediment, dominated by silt, of eolian (wind-blown) origin. Difficult. Alberese A compact clay and limestone found in the Chianti region. A example of loess is the clay and loam rich soil of Russia. For information on user permissions, please read our Terms of Service. Geologos. Major loess deposits are found in Shaanxi, CHINA, in some of the U.S. plains states, notably western IOWA and western NEBRASKa, and some parts of Europe, such as central BELGIUM. The Loess (wind-blown silt) soils in eastern Washington are the top layer of soil that covers the sandy-loam ancient flood soils below. 'All Intensive Purposes' or 'All Intents and Purposes'? 2016. Sometimes calcareous concretions (loess dolls, lime nodules), the shells of terrestrial mollusks, and the bones of mammals, particularly rodents and mammoths, are encountered in the loess. In some parts of the world, windblown dust and silt blanket the land. In some interlayers there are many grains of volcanic ash that has been carried by the wind for hundreds of kilometers from the site of eruption. Because of the loess soil structure characteristics, the loess area is cut into deep and large-scale gullies after suffering from current scour. . Loess grains are angular, with little polishing or rounding, and composed of crystals of quartz, feldspar, mica and other minerals. Delivered to your inbox! In general, loess is defined as aeolian deposits of predominantly silt-sized mineral dust (Pcsi, 1990), which undergoes syn-and post-depositional modification to produce a characteristic. Such soils are highly susceptible to water erosion. Loess usually erodes very slowlyChinese farmers have been working the loess around the Yellow River for more than a thousand years. "loose" (compare German los, from Proto-Germanic *lausaz, from PIE root *leu-"to loosen, divide, cut apart."
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