Ultisol
Sign in to saveAlso known as red clay soil
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 are defined as mineral soils which contain no calcareous (calcium carbonate containing) material anywhere within the soil, have less than 10% weatherable minerals in the extreme top layer of soil, and have less than 35% base saturation throughout the soi
Key facts
- Soil.name
- Ultisol
- Soil.alternative_name
- Red Clay Soil
- Soil.image
- Ultisol.jpg
- Soil.image_size
- 250px
- Soil.image_caption
- A Ultisol profile
- Soil.classification_system
- USDA soil taxonomy
- Soil.process
- weathering
- Soil.climate
- tropical, humid subtropical, oceanic
via Wikipedia infobox
Wikidata facts
- Image
- Ultisol.jpg
Show 2 more facts
- Commons category
- Ultisols
- exact match
- purl.obolibrary.org/obo/ENVO_01001397
via Wikidata · CC0
~7 min read
Article
7 sectionsContents
- Introduction
- Gardening in Ultisol
- Possible solutions
- Planting in Ultisol
- Suborders
- See also
- References
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 are defined as mineral soils which contain no calcareous (calcium carbonate containing) material anywhere within the soil, have less than 10% weatherable minerals in the extreme top layer of soil, and have less than 35% base saturation throughout the soil. Ultisols occur in humid temperate or tropical regions. While the term is usually applied to the red clay soils of the Southern United States, Ultisols are also found in regions of Africa, Asia, Australia and South America.
In the World Reference Base for Soil Resources (WRB), most Ultisols are known as Acrisols and Alisols. Some belong to the Retisols or to the Nitisols. Aquults are typically Stagnosols or Planosols. Humults may be Umbrisols.