I was reading a research article and found these term which i was completely unaware.
Ultisols and oxisols are two tropical soil orders which are characterized by high acidity and low fertility. Ultisols have a characteristic of producing clay layers which are characteristic. Ultisols have a characteristic of producing clay layers which are characteristic. Oxisols are more uniform and form little layers being Oxisols are more uniform and form little layers being Oxisols are more uniform and form little layers being Oxisols are more uniform and form little layers being oxic throughout. The University of Illinois has a good pictorial guide to the global soil orders which a short concise desription of each one.
The 12 soil orders are listed below in the sequence in which they key out in Soil Taxonomy.
Click on the order name for more information and to view images of example soils and landscapes.
Gelisols - soils with permafrost within 2 m of the surface
Histosols - organic soils
Spodosols - acid forest soils with a subsurface accumulation of metal-humus complexes
Andisols - soils formed in volcanic ash
Oxisols - intensely weathered soils of tropical and subtropical environments
Vertisols - clayey soils with high shrink/swell capacity
Aridisols - CaCO3-containing soils of arid environments with subsurface horizon development
Ultisols - strongly leached soils with a subsurface zone of clay accumulation and 35% base saturation
Inceptisols - soils with weakly developed subsurface horizons
Entisols - soils with little or no morphological development
Dear Numan Ali,
The main difference is that oxisols have small differences in clay quantities among B horizons, and ultisols have a clear and abrupt difference in clay in the B horizon, which is denominated "textural B horizon". This characteristic leads to better permeability in oxisols than in ultisols, since textural b horizons have lower permeability.
Please see: http://passel.unl.edu/pages/informationmodule.php?idinformationmodule=1130447032&topicorder=10&maxto=14
Respected Paul Reed Hepperly, Mario Guilherme Garcia Nacinovic and Gonzalo Galileo Rivas Platero have already answered your question very well.
you may like to see this basic information
https://en.wikipedia.org/wiki/Ultisol
https://www.britannica.com/science/Ultisol
https://en.wikipedia.org/wiki/Oxisol
http://www.cals.uidaho.edu/soilorders/oxisols.htm
http://passel.unl.edu/pages/informationmodule.php?idinformationmodule=1130447032&topicorder=11&maxto=16
http://passel.unl.edu/pages/informationmodule.php?idinformationmodule=1130447032&topicorder=10&maxto=14
https://www.soils.org/discover-soils/soil-basics/soil-types/oxisols
http://www.iec.cat/mapasols/DocuInteres/PDF/Llibre08_7.pdf
Interesting question indeed. Infact , genesis of both Ultisol and Oxisol is governed by age of geomorphic surfaces and nature of parent material ,besides typical humid tropical climate .
In Ultisol, presence of plinthite resulting from wet-dry cycles due to fluctuating water table , presence of argillic(accumulated clay minerals in the B horizon) /kandic horizon over decomposed sedimentary rock ( e.g. Paleudult), low base saturation of
In relation to clay accumulation in the subsoil layers this can lead to very impeded drainage issues. Plow pans are something that need to be considered if we are to optimize the cropping potential. Subsoil acidity can lead to greatly restricted rooting potential and in these Oxisol and Ultisols liming to eliminate aluminum and manganese toxicity can be critical.
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