Extensive soil database

[Timmah!]

Varied information from the general to the very specific:

http://soils.usda.gov/

[Timmah!]

Here's an example of the specificity of information available:
http://websoilsurvey.nrcs.usda.gov/a...oilSurvey.aspx

Soil Chemical Properties:
Calcium Carbonate (CaCO3)
Cation-Exchange Capacity (CEC-7)
Effective Cation-Exchange Capacity (ECEC)
Electrical Conductivity (EC)
Gypsum
PH
Sodium Absorption Ratio
Soil Erosion Factors:
K Factor, Rock Free
K Factor, Whole Soil
T Factor
Wind erodibility
Soil Physical properties:
Available water capacity
Available wate supply
Bulk Density
Organic Matter
Percent silt
Percent clay
Percent sand
Plasticity Index
Saturated Hydraulic Conductivity
Surface Texture
Water Content
Soil Qualities & Features:
AASHTO Group Classification (Surface)
Depth to a Selected Soil Restrictive Layer
Depth to Any Soil Restrictive Layer
Drainage Class
Frost Action
Frost-Free Days
Hydrologic Soil Group
Parent Material Name
Representative Slope
Unified Soil Classification (Surface)
Water Features:
Depth to Water Table
Flooding Frequency Class
Ponding Frequency Class
Vegetative Productivity
Particle size & Coarse Fragments representing % or silt, clay, & sand.
and much more.....

[ireilly]

Hmm, folks here aren't usually so reticent....

I for one found this useful and very detailed. I especially like how they tied the soil surveys to the GIS so you can just drill in and see the survey areas' overlays.

More info is usually good IMO. Now, what I do with the info - that's where it gets iffy.

Thanks for sharing this.

[salix]

I also want to thank you, but personally will wait until the winter "quiet" time to delve (sorry!) into this...