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- Abrupt textural change.—A diagnostic soil characteristic of mineral soils defined as a considerable increase in silicate clay content within a short vertical distance (<7.5 cm) between the epipedon and an underlying argillic, kandic, glossic, or natric subsoil horizon.
www.nrcs.usda.gov/sites/default/files/2022-08/A_Glossary_of_Terms_Used_in_Soil_Survey_and_Classification.pdfA Glossary of Terms Used in Soil Survey and Soil Classification
Examples include andic soil properties, episaturation, and identifiable secondary carbonates. A significant number of the terms included in this glossary are words that can be found in a common dictionary, but that have specific unique meanings in the context of soil survey and soil classification.
May 1, 2011 · According to Soil Taxonomy (ST), ortstein consists of spodic materials and occurs in a layer that is ≥25 mm thick and ≥50% cemented (Fig. 1A-1C; 34). In ST, ortstein is both a diagnostic subsurface horizon and the only rupture-resistance class recognized in the system.
- James Bockheim
- 19
- 2011
- 01 May 2011
Jan 1, 2014 · According to Soil Taxonomy (ST), ortstein consists of spodic materials and occurs in a layer that is ≥25 mm thick and ≥50 % cemented (Soil Survey Staff 2010) (Fig. 18.1). In ST, ortstein is both a diagnostic subsurface horizon and the only rupture-resistance class recognized in the system.
- James G. Bockheim
- 2014
Jan 15, 2018 · Podzolic soils with ortsteins are used for forestry worldwide. Pore size distribution (PSD) and strength of cemented ortstein horizons affect soil transport properties and plant growth but they are scarcely understood.
- Jerzy Lipiec, Ryszard Świeboda, Jacek Chodorowski, Marcin Turski, Mieczysław Hajnos
- 2018
A Key to Common Diagnostic Horizons in Soil Taxonomy. EPIPEDONS: An “A” horizon is a histic epipedon (one or more horizons) that is characterized by saturation (for 30 days or more, cumulative) and reduction for some time during normal years (or is artificially drained) and either: Consists of organic soil material (see below) that:
- 183KB
- 4
May 1, 2011 · However, ortstein is not restricted to soils with poor drainage as only 39% of the soils with ortstein have an aquic soil moisture regime. From a weight-of-evidence assessment, ortstein is cemented by Al-organic complexes and short-range-order compounds, and placic horizons are cemented by Fe as ferrihydrite or as Fe-organic complexes.
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Jun 10, 2014 · According to Soil Taxonomy (ST), ortstein consists of spodic materials and occurs in a layer that is ≥25 mm thick and ≥50 % cemented (Soil Survey Staff 2010) (Fig. 18.1). In ST, ortstein is...
