Oxisol (ˈɒksɪˌsɒl) is the official spelling of a soil classification in the US Soil Taxonomy. It is pronounced using the IPA phonetic transcription as /ˈɒksɪsɒl/. The word is derived from the Greek words oxys, meaning "sharp" or "acid," and sol, meaning "soil." Oxisols are characterized by their high levels of iron and aluminum oxides, which make them resistant to weathering and erosion. The correct spelling of Oxisol with the 'x' in the middle is important for the classification of soils in different regions of the world.
Oxisol is a type of soil classified under the Soil Taxonomy system as a subgroup of the order of Ultisols. It is typically found in tropical and subtropical regions characterized by high temperatures and rainfall. Oxisols are derived from old and highly weathered parent materials such as basalt or granite.
The term "oxisol" is a combination of two words - "oxidation" and "sol" (for soil), which pertains to its defining characteristic of having a high degree of weathering and oxidation. Oxisols are rich in iron and aluminum oxides, which result from the extensive reaction of minerals with oxygen and water over long periods of time.
The physical properties of oxisol are typically characterized by a coarse and sandy texture due to the leaching of clay and fine particles. Oxisols also exhibit a deep profile with distinct horizons, often with a reddish or orange coloration due to the abundance of iron oxide. This soil type is usually acidic, with a low natural fertility due to the loss of essential nutrients.
Oxisols are known to have poor agricultural suitability due to their low fertility and high susceptibility to erosion. However, when managed properly, they can support certain crops with the help of regular additions of organic matter and fertilizers. Oxisols are commonly found in regions with tropical rainforests, savannas, and other ecosystems where nutrient cycling is relatively high.
The word "oxisol" is derived from a combination of two terms: "oxy-" and "-sol".
- The prefix "oxy-" is derived from the Greek word "oxus", which means "sharp" or "acid". It generally indicates the presence of oxygen or the oxidation process. In soil science, "oxy-" suggests the presence of oxidized forms of elements, such as iron or aluminum, which contribute to the distinctive characteristics of the soil.
- The suffix "-sol" comes from the Latin word "solum", which means "soil" or "ground". This is a common suffix used in soil classification, referring to a type of soil or soil horizon.
Combining these two elements, "oxisol" describes a soil type that is characterized by the presence of oxidized minerals, particularly iron and aluminum, which contribute to the soil's reddish or yellowish color and other specific properties.