A vertisol is a Soil Order in the USDA soil taxonomy [1] and a Reference Soil Group in the World Reference Base for Soil Resources (WRB). [2] It is also defined in many other soil classification systems. In the Australian Soil Classification it is called vertosol. [3] The natural vegetation of vertisols is grassland, savanna, or grassy woodland ...

变性土是美国土壤系统分类中的一个土纲。发育于有明显干湿季节交替的气候条件下，富含由蒙脱石、伊利石或混生矿物为主要成分的黏粘构成的矿质土壤。黏粒的来源可能是黏土状沉积物或基性岩浆岩经受化学作用发迹的结果。因黏粒含量多，土壤膨胀收缩性大，湿时黏韧，干时开裂，裂隙 …

Vertisol, one of the 30 soil groups in the classification system of the Food and Agriculture Organization (FAO). Vertisols are characterized by a clay-size-particle content of 30 percent or more by mass in all horizons (layers) of the upper half-metre of …

Vertisol Cracks, Utah — The ability of Vertisols to shrink upon drying creates the large cracks seen here (small box for scale is approximately 6 cm (2.4 inches long). 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.

Vertisols have a high content of expanding clay minerals. They undergo pronounced changes in volume with changes in moisture.

1996年1月1日 · However, models proposed to explain the genesis of vertisol features have not received universal agreement. Because of their clay content, vertisols are global resources that are resilient to degradation compared to other soils.

The Vertisol and the Histosol orders in Soil Taxonomy represent soils that change volume with change in water content. The Vertisols are the more significant, with great areas in India (approx. 7.9 × 10 5 km 2 ), Australia (approx. 7 × 10 5 km 2 ), and Sudan (approx. 5 × 10 5 km 2 ), while China, Ethiopia, and the USA each have approximately ...

Wide-cracking dark coloured Vertisol, Nicaragua (Grumi-Pellic Vertisol (Eutric); ISRIC reference soil NI 009) Broad beds and furrows - a proven technology to cultivate Vertisols, Kenya. Microphoto of a Vertisol; clay particles are oriented along a slickenside in a striated pattern

2020年4月20日 · Vertisol es un grupo de suelos en la clasificación de la base referencial mundial del recurso suelo (World Reference Base for Soil Resources). Se caracterizan por ser suelos con alto contenido de arcillas expansivas en un perfil de horizontes poco diferenciados.

The formation of Vertisol parent materials and Vertisol profiles becomes evident if one examines 'red-black' soil catenas 1, as abundant in Africa, on the Indian subcontinent and in Australia (Blokhuis, 1982). The typical configuration features red soils ( Luvisols) on crest and upper slope, shallow or moderately