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Data Usage
The National Soil Survey Laboratory, on behalf of the National Cooperative
Soil Survey, 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 or methods used
in other laboratories (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,
or other listed resources.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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