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Data Usage
The National Soil Survey Center - Soil Survey Laboratory is pleased to make
available pedon data from analyses for soil characterization and research
within the National Cooperative Soil Survey. Less than complete characterization
data are available for many pedons because only selected measurements were
planned. The repository contains completed project information of the Soils
Survey Laboratory. Information is provided as NRCS-SOI-8 forms
and returned to NSSC-SSL, laboratory analyses are completed, suspect
measurements are identified and rerun, and errors are found and corrected. The
database includes pedons that represent the central concept of a soil series,
pedons that represent the central concept of a map unit but not of a series, and
pedons sampled to bracket a range of properties within a series or landscape.
For research purposes, all such data are retained in the database. Users
unfamiliar with a given soil may want to consult a soil scientist to determine
how well a given pedon represents its soil series.
For personal assistance by an experienced
laboratory soil scientist phone: 402-437-5016
Analytical procedures and methods of soil preparation are identified by methods codes in the column headings
of the standard NSSC data sheets and are described in SSIR No. 42. Some of the
data for some pedons were obtained by cooperating NCSS laboratories. Strict
quality control measures were applied in the analytical procedures but NSSC does
not warrant that the data are error free or that the measurements in all cases
are within the applicability range of the laboratory methods. For example,
dispersion of clay in some soils (e.g., Soils derived from volcanic materials,
or high in Fe oxides, gypsum, carbonates, or other cementing materials) is
incomplete by the standard method used by the SSL laboratory for determining
particle size distribution, determinations of clay minerals by x-ray diffraction
are relative, and measurements of very high or very low quantities by any method
are not very precise. Other measurements have limitations in some kinds of
soils. Such data are retained in the database for research purposes. For detailed information on SSL methods (e.g., procedures,
interferences), refer to web site: Soil Survey Investigation
Report 42 Information on the applications of laboratory data, reference web
site: Soil Survey
Investigation Report 45
You are most WELCOME to use the database,
but you should be aware that the assessment of the accuracy and applicability is
strictly a USER RESPONSIBILITY and the NRCS and NCSS
take no responsibility for problems that arise from use of this database.
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