loess soil definition

1996 - 2022 National Geographic Society. A variety of grain-size analyses show that this . If a media asset is downloadable, a download button appears in the corner of the media viewer. Loess is a sedimentary deposit originated by wind.El loess es un depsito sedimentario de origen elico. 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. Text on this page is printable and can be used according to our Terms of Service. Dry bare soil is more likely to be eroded by the wind than moist soil or soil covered with plants. Soaked and loaded loess, however, is liable to collapse and slumping. Loess soil is homogeneous and is also highly porous. In Louisiana, loess is common in East and West Feliciana Parishes, along with Franklin Parish on the Macon Ridge. Definition in the dictionary English. You cannot download interactives. What are dunes and loess? 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. loess soil. When glaciers grind rocks to a fine powder loess can form. Loess is mostly created by wind, but can also be formed by glaciers. Soil; Anagrams for loess . Accessed 4 Nov. 2022. LOESS combines much of the simplicity of . Bikini, bourbon, and badminton were places first. The American Heritage Student Science Dictionary, Second Edition. Wardoyo, S.S. & A.Z.P.B. 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. If you have questions about licensing content on this page, please contact ngimagecollection@natgeo.com for more information and to obtain a license. Sand dunes form when the wind deposits sand. The soil data include soil texture (weight of sand, slit, and clay), soil carbon, and bulk density to run the PAWS model (plant available water in soil), and these data were obtained from the field measurements or published paper. Definition of loess. a loamy, usu. It is stable, however, as long as it remains dry. Yellow RiverThe Yellow River gets its name from the yellow loess suspended in the water. The Loess ( / lo.s /, / ls /, or / ls /) Hills are generally located between 1 and 15 miles (24 km) east of the Missouri River channel. 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. What does loess mean? The fine particles in the loess consist of various clay minerals (hydromica, kaolinite, and montmorillonite). Washington wines are highly aromatic with slightly lighter color and smooth tannin. Such soils are highly susceptible to water erosion. Loess is the source of most of our Nation's rich agricultural soils and is common in the U.S. and around the world. She or he will best know the preferred format. The soils formed in loess more than 4 feet thick. When the route passes through hillsides of watershed, attention shall be paid to find out that whether there is unstable section of active gully region. Record the pronunciation of this word in your own voice and play it to listen to how you have pronounced it. Streams carry the powder to the end of the glacier. Loam Definition: (n.) A kind of soil; an earthy mixture of clay and sand, with organic matter to which its fertility is chiefly due. Login . A daily challenge for crossword fanatics. Albero Synonymous with albariza. Loess is found in Europe, Asia, North America, and South America, predominantly in the steppe and semisteppe regions of the temperate zone. W. G. Hale, V. A. Saunders, J. P. Margham 2005 Loess grains are angular, with little polishing or rounding, and composed of crystals of quartz, feldspar, mica and other minerals. In some parts of the world, windblown dust and silt blanket the land. Shanghai Cooperation Organization It is easily tilled, or broken up, for planting seeds. GEOGRAPHIC SETTING: Memphis soils are on nearly level to very steep uplands and terraces having slopes ranging from 0 to 45 percent. mineral noun inorganic material that has a characteristic chemical composition and specific crystal structure. Loess is the parent rock of chernozem and sierozem soil. 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. mica noun type of mineral that can be split into thin, see-through sheets. Meaning of loess. Loess usually erodes very slowlyChinese farmers have been working the loess around the Yellow River for more than a thousand years. loess soil translation in English - English Reverso dictionary, see also 'loss',loessal',less',loessial', examples, definition, conjugation The climate is warm and humid with annual precipitation of about 49 inches (124.46 cm) and annual temperature of 65 degrees F (18.33 degrees C). Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. When you reach out to him or her, you will need the page title, URL, and the date you accessed the resource. Environment Dictionaries. Any interactives on this page can only be played while you are visiting our website. It is used for making brick (adobe) and cement and as a filler for levees and dams. The loess has intercalations with a clearly expressed soil profile, that is, buried soils that testify to the existence of warmer and wetter periods (interglacials) than the time during which the loess formed (ice ages). loess noun windblown soil or silt. 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 loess soil. Match all exact any words . LOESS is one of many "modern" modeling methods that build on "classical" methods, such as linear and nonlinear least squares regression. All content on this website, including dictionary, thesaurus, literature, geography, and other reference data is for informational purposes only. When blown by the wind, these sediments are referred to as. A uniform wind-deposited accumulation of silty material having an open structure and relatively high cohesion due to cementation of clay or calcium-like material at grain contacts. and more. Loess are typically a kind of clayey silt, and the silt content (0.005-0.05 mm) is generally greater than 50%. Unlike other soils, loess is pale and loosely packed. Can you pronounce this word better. A example of loess is the clay and loam rich soil of Russia. Slopes range from 0 to 60 percent. An essentially unconsolidated, unstratified calcareous silt; commonly it is homogeneous, permeable, and buff to gray in color, and contains calcareous concretions and fossils. Loess form when the wind deposits clay and silt. In some parts of the world, windblown dust and silt blanket the land. These soils are commonly on loess hills and less commonly on outwash plains. Coarse silt particles (10-50 m in diameter) make 40-70% of typical loess by weight. Missouri River noun (4,382 kilometers/2,723 miles) river in the western United States. A buff to gray windblown deposit of fine-grained, calcareous silt or clay. To cover, smear, or fill with loam. The production area has sandy soils and, in the south-east, loamy and loess soils. 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. Parting surfaces are vertical because capillary incrustations of lime, developed around the roots of a grassy plant cover, lend a vertical texture to loess. Moderate. The soils types include shell-limestone, keuper, marl, Soils here are very heterogenous with thick, When the tunnel was first dug, the ice held the, 'Dunderhead' and Other Nicer Ways to Say Stupid, 'Pride': The Word That Went From Vice to Strength. Often used to describe the march of time, what does. LOESS (PRONOUNCED "LUSS") is a very fine light soil, often buff, yellow, or gray in color. Very difficult. Vulnerable to water erosion. moisture noun wetness. Loess is mostly created by wind but can also be formed by glaciers. Environmental adaptability of Canavalia virosa and Flemingia congesta to sandy ash soil of Merapi Volcano, Java. Albian A type of schist found in Maury, Roussillon. loess has definitions from the field of geology. This information should not be considered complete, up to date, and is not intended to be used in place of a visit, consultation, or advice of a legal, medical, or any other professional. English to Sinhala: loess soil: . Ls, zengin, toz benzeri bir toprak olarak tanmlanabilir. These particles include sand crystals made of quartz or mica. (v. The definition of loess is a very rich loam of silt or clay that is deposited by the wind. When glaciers grind rocks to a fine powder, loess can form. Loam Soils To save this word, you'll need to log in. As a verb loam is to cover, smear, or fill with loam. This layer of fine, mineral-rich material is called loess. Loess is a kind of fine dirt or dust that's made up of silt, sand, and clay. In 1877 the German scientist F. Richthofen proved the subaerial origin of Chinese loess (it was formed on land, and water played a limited role). 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 European farmers first came to the Palouse the loess was thought to be too arid for farming and was considered part of the Great American Desert. I. Smalley, I. Obreht. 2016. These example sentences are selected automatically from various online news sources to reflect current usage of the word 'loess.' 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. 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.) Loess is the parent rock of chernozem and sierozem soil. In Oregon, one of the favorite soil types for Pinot Noir is a silt-clay soil called Willakenzie. W. G. Hale, V. A. Saunders, J. P. Margham 2005 Want to thank TFD for its existence? ls), unstratified soil deposit of varying thickness, usually yellowish and composed of fine-grained angular mineral particles mixed with clay.It is found in many re In parts of China, residents build cave-like dwellings in thick loess cliffs.Extensive loess deposits are found in northern China, the Great Plains of North America, central Europe, and parts of Russia and Kazakhstan. Loess is commonly defined as an accumulation of windblown silt, covering more than 10% of the earth's surface, mainly in the earth's temperate zone ( Pye, 1995, Pcsi and Richter, 1996, Muhs and Bettis, 2003 ). Loess can be made up of silt and loamy particles up to 50% and of clay particles up to 10%. loess noun [ U ] geology specialized us / lo.es / uk / l.es / a type of light brown or grayish soil, consisting of very small pieces of quartz and clay, that is blown and left behind by the wind SMART Vocabulary: related words and phrases Soil aerator alluvial boulder clay clay clayey dirt earthiness earthy frozen gravelly grit loamy ore peat EurLex-2. . . 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. Definition of loess in the Definitions.net dictionary. Send us feedback. Zhang GS, Chan KY, Li GD, Huang GB (2008) Effect of straw and plastic film management under contrasting tillage practices on the physical properties of an erodible, By opening some of the sacs, we observed a multilayered structure, one of the layers composed of, (1) The experiment and comparison results show that the loess permittivity increases along with the broadening of moisture content in the, Paluszek, "Spatial and temporal variations in erodibility of, This scenic roadway, cut deep into the soft, Effects of urease and nitrification inhibitors added to urea on nitrous oxide emission from a, Due to the excavation and the highly-erodible nature of the, The Kremstal is adjacent to the Wachau, and its combination of, An area 80 meters deep and 250 meters long of, Dictionary, Encyclopedia and Thesaurus - The Free Dictionary, the webmaster's page for free fun content, Stratification of soil organic C, N and the C: N ratio as affected by different plastic film mulching modes in a semiarid region of China, The egg sac of Benoitia lepida (Araneae: Agelenidae): structure, placement and the function of its layers, Dielectric Characteristics of Unsaturated Loess and the Safety Detection of the Road Subgrade Based on GPR, TTB establishes Loess Hills District in Iowa and Missouri, The effect of land use change on transformation of relief and modification of soils in undulating loess area of east Poland, Iconic Mississippi: Mississippi is home to a bounty of historical sights, but five landmarks reign supreme, Maize Response to Biodegradable Polymer and Urease Inhibitor Coated Urea, Property owners not responsible for damage to adjacent property caused by withdrawal of lateral support by previous owner, Huge cave-in in central China buries 24 people, 16 escape, Responses of soil organic carbon, aggregate stability, carbon and nitrogen fractions to 15 and 24 years of no-till diversified crop rotations. What is a loess made out of? noun 0 1 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. What's the difference between loam and loess? The Rights Holder for media is the person or group credited. All rights reserved, National Geographic Magazine: Our Good Earth, National Geographic WildWorld: Central China Loess Plateau, Iowa Department of Natural Resources: Loess Hills State Forest. (n.). Loess - a uniform aeolian deposit of silty material having an open structure and relatively . i.) loess. 'All Intensive Purposes' or 'All Intents and Purposes'? In terms of its composition loess is usually classified as a loam or, more rarely, as a sandy loam. a fine-grained unstratified accumulation of clay and silt deposited by the wind https://www.thefreedictionary.com/Loess+soil. TAXONOMIC CLASS:Fine-silty, mixed, superactive, mesic Ultic Hapludalfs Modern regression methods are designed to address situations in which the classical procedures do not perform well or cannot be effectively applied without undue labor. National Geographic Headquarters 1145 17th Street NW Washington, DC 20036, National Geographic Society is a 501 (c)(3) organization. If no button appears, you cannot download or save the media. The word stems from the German word loss or "loose," and loess is generally easily eroded by water or blown by wind. Encyclopedic entry. Santosa. Till Niermann. Soil properties across Louisiana vary considerably as well. Subscribe to America's largest dictionary and get thousands more definitions and advanced searchad free! This information should not be considered complete, up to date, and is not intended to be used in place of a visit, consultation, or advice of a legal, medical, or any other professional. Most loess is believed to have originated during the Pleistocene Epoch from areas of land covered by glaciers and from desert surfaces. Loess can be described as a rich, dust-like soil. sand and loess soils exposed to wind erosion; EurLex-2. Earth Science, Geography, Physical Geography. The depth of a gully can reach tens of meters. For information on user permissions, please read our Terms of Service. Generally speaking, the soils are slightly to moderately acidic, owing to the large annual rainfall. Alberese A compact clay and limestone found in the Chianti region. If you have questions about how to cite anything on our website in your project or classroom presentation, please contact your teacher. The audio, illustrations, photos, and videos are credited beneath the media asset, except for promotional images, which generally link to another page that contains the media credit. "loose" (compare German los, from Proto-Germanic *lausaz, from PIE root *leu-"to loosen, divide, cut apart." These changes may be due to the methods used in sampling, handling, transportation, storing or testing the sample. Soil & Tillage Research 174: 1-5. Disturbed Soil Sample - this type of soil sample has been changed from its naturally occurring condition in the ground in some way. Notifications; . The American Heritage Student Science Dictionary, Second Edition. [5] A surface depression or hollow commonly found in arid and semiarid regions caused by wind erosion. Most loess is believed to have originated during the Pleistocene Epoch from areas of land covered by glaciers and from desert surfaces. 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? REFERENCES Loess is relatively well-sorted clastic sediment that is homogeneous, porous and slightly altered. Properties of Loess. loess. Loess is mostly created by wind, but can also be formed by . Particles 0.010.05 mm in size predominate; clay particles smaller than 0.005 mm are present in an amount of 530 percent. ess. It may also contain organic material, such as the dusty remains of skeletons from desert animals.On the far side of the desert, moisture in the air causes the particles and dust to settle on the ground. Loess is a German word meaning loose. More dust slowly accumulates, and loess is formed.Loess often develops into extremely fertile agricultural soil. Pastoralist. 1. There, grass and the roots of other plants trap the dust and hold it to the ground. Find 38 ways to say LOESS, along with antonyms, related words, and example sentences at Thesaurus.com, the world's most trusted free thesaurus. The features of loess make it to be the most fertile soil among all the other types. Geology. Streams carry the powder to the end of the glacier. *. Soils here are particularly complex, featuring chalk, sand, gravel, clay. Test your knowledge - and maybe learn something along the way. The Loess (wind-blown silt) soils in eastern Washington are the top layer of soil that covers the sandy-loam ancient flood soils below. 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, the biologically active, porous medium that has developed in the uppermost layer of Earth's crust. However, the chronological 27 Mid-Late Quaternary loess-paleosol sequence in Lantian's Yushan, China: An environmental magnetism approach and its paleoclimatic significance The Loess Hills rise 200 feet above the flat plains forming a narrow band running north-south 200 miles along the Missouri River. 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. Environmental Engineering (English ver.) organic adjective The wind blows loess around until it settles and, over time, accumulates in one area. yellowish and calcareous deposit formed by wind, common in the Mississippi Valley and in Europe and Asia. loess [ l s, ls, ls ] A very fine grained silt or clay, thought to have formed as the result of grinding by glaciers and to have been deposited by the wind. Most loess is believed to have originated during the Pleistocene Epoch from areas of land covered by glaciers and from desert surfaces. Also popular are theories of the eolian (V. A. Obruchev), pedogenic (L. S. Berg), and polygenetic (eolian, deluvial, and pedogeniceluvial processes occurring in an arid climate) origin of loess. The question of the origin of loess has still not been finally settled. Thesaurus: All synonyms and antonyms for loess, Britannica.com: Encyclopedia article about loess. Some experiments in dryland farming of wheat began as early as the 1840s. Aeolian soil Sediments deposited by wind (eg, loess). It was first applied to the soil type along the Rhine River. Difficult. Intact loess features a random particle arrangement, high porosity, and significant number of macropores [ 19, 20 ].

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loess soil definition

loess soil definition