Ultisol, commonly known as red clay soil, is one of twelve soil orders in the United States Department of Agriculture soil taxonomy. The word "Ultisol" is derived from "ultimate", because Ultisols were seen as the ultimate product of continuous weathering of minerals in a humid, temperate climate without new soil formation via glaciation .

They occur in the extreme western part of the Ultisol delineation in Texas. Some are in California and on tropical islands. The vegetation is commonly forest or savanna.

Ultisol, one of the 12 soil orders in the U.S. Soil Taxonomy. Ultisols are reddish, clay-rich, acidic soils that support a mixed forest vegetation prior to cultivation. They are naturally suitable for forestry, can be made agriculturally productive with the application of lime and fertilizers, and

Piedmont Ultisol Landscape, North Carolina — This landscape is typical of the rolling Piedmont region of the southeastern U.S. This region is bordered by the Appalachian Mountains to the west and the Atlantic Coastal Plain to the east. Mean annual precipitation ranges from approximately 940-1,145 mm (37-45 inches).

Ultisol soils can be agriculturally productive with inputs of lime and fertilizers. Large areas of Ultisol are found in the southeastern USA, China, Indonesia, South America, and equatorial regions of Africa.

2024年5月24日 · Ultisol. Ultisols share many of the same properties as Oxisols. Highly weathered soils, they are often red/yellow in color reflecting the oxidation of iron and aluminum. Found in the moister portions of the Humid Subtropical climate, they have a illuvial clay layer which distinguishes them from Oxisols which do not. Figure \(\PageIndex{11 ...

Red clay or red mud, is the common name for a variety of ultisol found in the SE United States. Residents who live in the area often speak poorly of the soil, although in fact it isn’t as poor as all that.

The ideal Ultisol has a subsurface horizon of clay enrichment due to clay translocation from the surface horizons. However, in areas bordering the deserts, wind-blown sand may bury a former Oxisol, such as in western Zambia and Zimbabwe or in Mali and Niger.

1997年1月1日 · This chapter presents a brief overview of Ultisols in terms of their genesis, classification, distribution, and properties. The chapter illustrates crop management systems that have been used for agricultural production on these soils.

Old Soils (Ultisol) Typical Characteristics of Ultisols. Formation: Ultisols form through the processes of clay mineral weathering. Clays, with the possibility of oxides, accumulate in the B subsurface horizon. Ultisols are not as highly weathered as Oxisols.