Nebraska Soils Field Trip - Virginia Tech

More documents

Recommendations

Info

4th IUSS Soil Classification Conference <strong>Field</strong> Tour Guidebook Draft of new section on Artifacts for the National Soil Survey Handbook, Part 618--Soil Properties and Qualities (2) Significance.—Artifacts that decay quickly are similar to pararock fragments and are treated as such in sieve calculations. (3) Entries.—Enter nonpersistent or persistent in the Component Horizon Human Artifacts and Pedon Horizon Human Artifacts tables based on whether the artifact is expected to decay in less than a decade or greater than a decade. Nonpersistent artifacts are expected to decay in less than a decade. Persistent artifacts remain intact for a decade or more. I. Artifact Roundness (1) Definition.—“Artifact Roundness” is an expression of the sharpness of edges and corners of objects. (2) Significance.— The roundness of artifacts impacts water infiltration, root penetration, and macropore space. (3) Classes.—The artifact roundness classes follow those used for fragment roundness: Roundness Class Definition Very angular Strongly developed faces with very sharp, broken edges. Angular Strongly developed faces with sharp edges (Soil Survey Manual (SSM)). Subangular Detectable flat faces with slightly rounded corners. Subrounded Detectable flat faces with well-rounded corners (SSM). Rounded Flat faces absent or nearly absent with all corners rounded (SSM). Well rounded Flat faces absent with all corners rounded. (4) Entries.—Enter the appropriate artifact roundness class name for the record of artifacts populated in the Component Horizon Human Artifacts and Pedon Horizon Human Artifacts tables. J. Artifact Safety (1) Definition.—“Artifact Safety” is the degree of risk to humans from contact with soils that contain artifacts. Physical contact with soils containing dangerous or harmful artifacts should be avoided unless proper training and protective closthing is available. The risk is based on toxicity to living organisms and not the physical risk that may be present from sharp or heavy objects. Harmful toxicity may be immediate or long-term, or through direct or indirect contact. Examples of innocuous artifacts include brick, concrete, glass, plastic, unprinted paper and cardboard, and untreated wood. Some examples of noxious artifacts are batteries, bitumen (asphalt), fly ash, garbage, paper printed with metallic ink, and wood treated with arsenic. (2) Significance.—Noxious artifacts are dangerous and require special handling when sampling. Areas with noxious artifacts should have restricted human contact. 140
4th IUSS Soil Classification Conference <strong>Field</strong> Tour Guidebook Draft of new section on Artifacts for the National Soil Survey Handbook, Part 618--Soil Properties and Qualities (3) Entries.—Enter innocuous or noxious in the Component Horizon Human Artifacts and Pedon Horizon Human Artifacts tables based on whether the artifacts are potentially toxic to living beings. K. Artifact Shape (1) Definition.—“Artifact Shape” is a description of the overall shape of the object. (2) Significance.—Artifact shape differs from rock, pararock, and wood fragment shape descriptions and is important for fluid flow in the soil as well as influencing excavation difficulty. (3) Classes.—The artifact shape classes are elongated, equidimensional, flat, and irregular. (4) Entries.—Enter the appropriate artifact shape class name for each record of artifacts populated in the Component Horizon Human Artifacts and Pedon Horizon Human Artifacts tables. L. Artifact Size (1) Definition.—“Artifact Size” is based on the cross-sectional diameter of the object. (2) Significance.—The size of discrete artifacts is significant to the use and management of the soil. Artifact sizes ranging from 2 mm to 75 mm that are both cohesive and persistent are considered when estimating the percent passing the sieves. It affects equipment use, excavation, construction, and recreational uses. (3) Entries.—Enter the cross-sectional diameter size of the ≥ 2 mm artifacts described in the Component Horizon Human Artifacts and Pedon Horizon Human Artifacts tables. The range of valid entries is from 2 to 3,000 millimeters, and only whole numbers (integers) are allowed. M. Artifact Volume (1) Definition.—“Artifact Volume” is the volume percentage of the horizon occupied by the 2 mm or larger fraction (20 mm or larger for wood artifacts) on a whole soil base. (2) Significance.—The volume occupied by discrete artifacts (2 mm or larger fraction) is important in selecting appropriate texture modifiers (i.e., artifactual, very artifactual, extremely artifactual). Some soil horizons contain combinations of artifacts and rock fragments. See Section 618.70 H. (iv) for guidance in assigning either single (artifact only), compound (artifact and rock fragment), or dual (rock fragment-artifact) texture modifiers for horizons containing artifacts. (3) Entries.—Enter the high, low, and representative values for the percent volume present of each size class and kind of artifact populated in the Component Horizon Human Artifacts and Pedon Horizon Human Artifacts tables. The range of valid entries is from 0 to 100 percent, and only whole numbers (integers) are allowed. 141
Page 1 and 2:
4 th International Union of Soil Sc
Page 3 and 4:
4th IUSS Soil Classification Confer
Page 5 and 6:
Page 7 and 8:
Page 9 and 10:
Page 11 and 12:
Page 13 and 14:
Page 15 and 16:
Page 17 and 18:
Page 19 and 20:
Page 21 and 22:
Page 23 and 24:
Page 25 and 26:
Page 27 and 28:
Page 29 and 30:
Page 31 and 32:
Page 33 and 34:
Page 35 and 36:
Page 37 and 38:
Page 39 and 40:
Page 41 and 42:
Taxonomic Classifications of surfac
Page 43 and 44:
Page 45 and 46:
Page 47 and 48:
Page 49 and 50:
Page 51 and 52:
40° 54' 28'' 40° 54' 15'' Soil Ma
Page 53 and 54:
Page 55 and 56:
Page 57 and 58:
Page 59 and 60:
Page 61 and 62:
Page 63 and 64:
Page 65 and 66:
Page 67 and 68:
Page 69 and 70:
Page 71 and 72:
Page 73 and 74:
Page 75 and 76:
Page 77 and 78:
Page 79 and 80:
Page 81 and 82:
Page 83 and 84:
Page 85 and 86:
Page 87 and 88:
Page 89 and 90:
Page 91 and 92: Seq. # Horizon depth (cm) Tour Book
Page 93 and 94: 4th IUSS Soil Classification Confer
Page 103 and 104: 41° 24' 55'' 41° 24' 44'' 4th IUS
Page 119 and 120: Seq. # 4th IUSS Soil Classification
Page 121 and 122: Pedon ID: S11NE153001 *** Primary C
Page 131 and 132: Seq. # 4th IUSS Soil Classification
Page 141: 4th IUSS Soil Classification Confer
Page 153 and 154: 41° 9' 27'' 41° 9' 12'' 4th IUSS
Page 159 and 160: Seq. # Horizon depth (cm) Tour Book
Page 175 and 176: Soil Taxonomy Fine-loamy, mixed, ac
show all

Nebraska Soils Field Trip - Virginia Tech

Create successful ePaper yourself

Delete template?

Save as template?