Saturday, February 23, 2013

NRCS and soil tests

let's see...what are we working with here. Soil data for design site from NRCS:

Soil data from the National Cooperative Soil Survey/ Web Soil Survey from the Natural Resources Conservation Service:

Data Source Information
Survey Area Data: Version 10, Sep 18, 2012

Setting
Landform: Ridges
Landform position (three-dimensional): Side slope, crest
Parent material: Clayey residuum or creep deposits over clayey residuum weathered from cherty limestone

Properties and qualities
Slope: 3 to 40 percent
Depth to restrictive feature (water table): More than 80 inches
Drainage class: Well drained
Capacity of the most limiting layer to transmit water (Ksat): Moderately high to high (0.60 to 2.00 in/hr)
Depth to water table: More than 80 inches
Frequency of flooding: None
Frequency of ponding: None
Available water capacity: Moderate (about 7.3 inches)

Interpretive groups
Farmland classification: Not prime farmland
Land capability (nonirrigated): 6e
Hydrologic Soil Group: B (Soils having a moderate infiltration rate when thoroughly wet. These consist chiefly of moderately deep or deep, moderately well drained or well drained soils that have moderately fine texture to moderately coarse texture. These soils have a moderate rate of water transmission.)

Typical profile
0 to 3 inches: Gravelly silt loam
3 to 10 inches: Gravelly silt loam
10 to 14 inches: Gravelly silty clay loam
14 to 65 inches: Gravelly clay

Data Source Information: Soil Survey Area: Hamilton County, Tennessee

This information reinforces what I found in my soil jar tests: gravelly silt loam, gravelly silty clay loam, with several patches of gravelly clay throughout the yard.
I did the soil test a few times in different areas of the yard (multiple pictures).  All areas are similar but it was interesting to find which parts of the yard are more clay-heavy and which have more loam and silt.  There are a few patches of straight clay, if I had a kiln I would use it for ceramics!







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