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Created: | Nov 19, 2019 at 7:09 a.m. | |
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Abstract
These are soil texture data (% sand/silt/clay) for samples collected May-July 2015 and December 2016 in References Areas 1, 4, and 7 during the installation of gas wells. Samples were obtained by coring to depths of 500 cm with a bucket auger. From 50-500 cm, sampling occurred at fixed intervals: 50-100, 100-150, 150-200, 200-250, 250-300, 300-350, 350-400, 400-450, and 450-500 cm. In the upper 50 cm, samples were taken at the following depths: 0-7.5 cm, 7.5-15 cm, 15-30 cm, and 30-50 cm. Extracted soil was mixed on a tarp and sub-sampled in the field. Individual samples were uniquely identified by Reference Area, Gas Well Number, and Depth. Samples were transported to Duke in plastic bags where they were opened and allowed to air-dry for a minimum of 2 weeks. After air-drying, samples were passed multiple times through a #10 sieve (2-mm mesh) to separate soil from > 2-mm fraction. Obtaining pre-sieve bulk soil mass, and post-sieve >2-mm mass, allowed >2-mm mass fraction to be estimated. The < 2-mm fraction was transferred to paper bags for oven-drying at 40C for 48-72 hours. Texture was measured on the oven-dry sample using a standard method based on gravitational sedimentation. The lab SOP is available upon request.
Subject Keywords
Coverage
Spatial
Temporal
Start Date: | |
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End Date: |
Content
ReadMe.md
CCZO -- Soil Texture -- Calhoun CZO -- (2015-2016)
OVERVIEW
Description/Abstract
These are soil texture data (% sand/silt/clay) for samples collected May-July 2015 and December 2016 in References Areas 1, 4, and 7 during the installation of gas wells. Samples were obtained by coring to depths of 500 cm with a bucket auger. From 50-500 cm, sampling occurred at fixed intervals: 50-100, 100-150, 150-200, 200-250, 250-300, 300-350, 350-400, 400-450, and 450-500 cm. In the upper 50 cm, samples were taken at the following depths: 0-7.5 cm, 7.5-15 cm, 15-30 cm, and 30-50 cm. Extracted soil was mixed on a tarp and sub-sampled in the field. Individual samples were uniquely identified by Reference Area, Gas Well Number, and Depth. Samples were transported to Duke in plastic bags where they were opened and allowed to air-dry for a minimum of 2 weeks. After air-drying, samples were passed multiple times through a #10 sieve (2-mm mesh) to separate soil from > 2-mm fraction. Obtaining pre-sieve bulk soil mass, and post-sieve >2-mm mass, allowed >2-mm mass fraction to be estimated. The < 2-mm fraction was transferred to paper bags for oven-drying at 40C for 48-72 hours. Texture was measured on the oven-dry sample using a standard method based on gravitational sedimentation. The lab SOP is available upon request.
Creator/Author
Heine, Paul R
CZOs
Calhoun
Contact
Paul Heine, Duke University, Nicholas School of the Environment, A205 LSRC, Durham, NC 27708. pheine@duke.edu
SUBJECTS
Disciplines
Soil Science / Pedology
Topics
Soil Texture
Keywords
Soil texture|Calhoun|gas wells|texture|sand|silt|clay|pipette method
Variables
Sample ID|Depth (cm)|% clay|% silt|% sand
Variables ODM2
Clay|Sand|Silt|Depth, soil|Recorder code
TEMPORAL
Date Start
2015-05-01
Date End
2016-12-31
SPATIAL
Field Areas
Calhoun CZO Research Area 1|Calhoun CZO Research Area 4|Calhoun CZO Research Area 7
Location
Calhoun CZO
North latitude
34.61146
South latitude
34.541470000000004
West longitude
-81.75554
East longitude
-81.67581
REFERENCE
CZO ID
5564
Additional Metadata
Name | Value |
---|---|
czos | Calhoun |
czo_id | 5564 |
keywords | Soil texture, Calhoun, gas wells, texture, sand, silt, clay, pipette method |
variables | Sample ID, Depth (cm), % clay, % silt, % sand |
disciplines | Soil Science / Pedology |
How to Cite
This resource is shared under the Creative Commons Attribution CC BY.
http://creativecommons.org/licenses/by/4.0/
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