Nebraska Soils Field Trip - Virginia Tech

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4th IUSS Soil Classification Conference <strong>Field</strong> Tour Guidebook Proposed Action 24: Eliminate Plagganthreptic Alorthods. Proposed Action 25: Eliminate Plagganthreptic Fragiorthods. Changes to Chapter 15: key to Ultisols. Proposed Action 26: Delete the subgroup of Anthropic Kandihumults. Proposed Action 27: Delete the subgroup of Anthropic Kanhaplohumults. CHANGES THROUGHOUT SOIL TAXONOMY Proposed Action 28: Add an exclusionary statement to subgroups that contain the terms Fluventic or ____fluventic throughout the Keys to prevent human-transported soils from being classified in those taxa. These pertain to Irregular Decrease in OC with depth. Proposed Action 29: Clearly define and propose a consistent set of additional extragrade subgroup formative elements for use throughout Soil Taxonomy, to be added as soil series are established. Anthraltic (from Gr. Anthropos, Human and L. alterāre, to change). Anthraquic (clearly defined anthraquic conditions). Anthropic Humic (have an anthropic epipedon and meets the color and carbon requirements of the mollic epipedon throughout). Anthropic (have an anthropic epipedon). Anthroportic (from Gr. Anthropos Human and L. portāre to carry) (i.e., the materials described in the Arents suborder). Plaggic (have an plaggen epipedon) Plagghaplic (have 25 cm of material that qualifies for plaggen epipedon but not ther required 50 cm). Combinations with existing formative elements at the subgroup level are encouraged as needed. CHAPTER 17: FAMILY AND SERIES DIFFERENTIAE AND NAMES Proposed Action 30: Add Add Human-altered and human–transported Material Family Class in Chapter 17 to be used for soils with significant mantles of human-altered or human-transported materials. To be inserted between Particle-size classes and their substitutes and Mineralogy classes in soils that use one of the set of additional extragrade subgroup formative elements in Proposed Action 29 and others clearly tied to human-altered or human-transported materials added later. The 17 classes are defined in order of importance to human health and safety and use and management of the soil, the control section defined, and the taxa identified where they are to be used. Proposed Action 31: The manufactured layer contact is added to the list of root-limiting layers for mineral soils. Proposed Action 32: The manufactured layer contact is added to the list of root-limiting layers for Histels. Proposed Action 33: The manufactured layer contact is added to the list of root-limiting layers for Histosols. APPENDIX Proposed Action 34: Add two references. 110
4th IUSS Soil Classification Conference <strong>Field</strong> Tour Guidebook Proposed Action 35: Delete this reference to citric acid since it is no longer proposed to be used in the definition of the anthropic epipedon. 9) An ad-hoc proposal to amend Part 629 of the National Soil Survey Handbook (Glosssary of Landform and Geologic Terms) to include several new anthropogenic microfeatures (less than the size of a pedon) and anthropogenic landforms. 111
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4 th International Union of Soil Sc
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4th IUSS Soil Classification Confer
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Taxonomic Classifications of surfac
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40° 54' 28'' 40° 54' 15'' Soil Ma
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Soil Taxonomy Fine-loamy, mixed, ac
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Nebraska Soils Field Trip - Virginia Tech

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