Weltweit sind etwa 3,2 Millionen Quadratkilometer oder knapp 2,5 Prozent der eisfreien Landfläche von Vertisolen bedeckt. Upload media Wikipedia: Instance of: soil type, Q12054558: Subclass of: soil: Authority control Q1192084 Library of Congress authority ID: sh85142923 Bibliothèque nationale de France ID: 14446055z. Nulla vehicula fermentum nulla, a lobortis nisl vestibulum vel. } 27960: 8.52: Aridisols: Ardisoil is the largest single soil order occurs in dry regions of the world. Vertisols. The colour value of the horizon must be less than 3.5 (dry). Dominant soil type: stony, dark cracking clays with good natural fertility (Vertic Cambisol) (10) Associated soil types. var imgAlt = dom_i.query(this).attr("alt") == undefined ? '' Phasellus eget velit at. W. Zech, P. Schad, G. Hintermaier-Erhard: Böden der Welt. var imgMarginTop = dom_i.query(this).css("margin-top") == undefined ? Soil Taxonomy. Soil Taxonomy. var imgTitle = dom_i.query(this).attr("title") == undefined ? '' Man findet sie weltweit in Regionen mit jahreszeitlich stark schwankenden Regenfällen, etwa in Ostaustralien, dem Sudan und Äthiopien (hier als englisch black cotton soil … Vertisol. Calcareous vertisol soil is the dominant agricultural soil type and covers over 80% of the agricultural cultivated land in Jordan. dom_i.query(document).ready(function(){ /*dom.query(document).ready(function(){ These are productive soils. if(imgTitle != ''){ As soil material sloughs off and accumulates in these cracks during the dry season, it is subsequently "swallowed" by the soil as it swells in the wet season. Due to the nature of the clay minerals these soils shrink and swell considerable during wetting and drying cycles. "none" : dom_i.query(this).css("float").trim(); Vertosols. Histosols (organic soils) Formed from accumulation of thick organic matter. Soils with the following: A clay field texture or 35% or more clay throughout the solum except for thin, surface crusty horizons 0.03 m or less thick and. Histosol, one of the 12 soil orders in the U.S. if(imgMarginRight.indexOf("px") > 0){ During dry periods, the soil volume shrinks and deep wide cracks form. 7 × 10 5 km 2 ), and Sudan (approx. Man findet sie weltweit in Regionen mit jahreszeitlich stark schwankenden Regenfällen, etwa in Ostaustralien, dem Sudan und Äthiopien (hier als englisch black cotton soil bekannt), Texas oder dem indischen Dekkan-Plateau. Sampling had shown that this nematode is present in large numbers in an alluvial soil while being almost entirely absent in vertisol from the same field. Tac is the new installation system for Fitnice modular vinyl flooring, that needs no glue… Read More. I.e Vertisol are soil with high clay content, consequently the texture classe of the soil is clay on average. Humic Vertisol Great Group These soils occur in the moister, central part of the agricultural region and have an Ah (or Ap ) horizon greater than or equal to 10 cm thick and a darker A horizon than the Vertisol great group. }); A rainfall simulator was used on Vertisols to compare water runoff and soil loss in a conventional tillage system (CT), NT system with crop residues removed (NT0), and NT with 50% of crop residues returned to the soil surface (NT50). Definition The definition of a Vertisol varies with the classification systems used, but for convenience we have used the one adopted in India (U.S. })*/ dom_i.query = jQuery.noConflict(true); They shrink as they dry and swell as they become moist. They are similar in all respects to the Vertisol order of the U.S. farmer-based soil classification to other, more heterogeneous and agro-ecologically representative regions in the Philippines. They have a clay texture throughout the profile; display strong cracking when dry, and shrink and swell considerably during wetting and drying phases. Diese Seite wurde zuletzt am 3. 2. Histosols are formed under waterlogged conditions typical of peat bogs, moors, and swamps. Typical are red-dish and yellowish from the iron and aluminium oxides left behind, with a weathered clay-like texture.