Current through Register Vol. 49, No. 13, September 23, 2024
Subpart 1.
Analytical methods.
Acceptable analytical methods for United States Department of
Agriculture textural classification, organic matter, extractable phosphorus,
exchangeable potassium, pH, and soluble salts are found in one or more of the
publications in items A to C which are incorporated by reference. These
documents are not subject to frequent change and are available through the
Minitex interlibrary loan system or the addresses given.
A. Recommended Chemical Soil Test Procedures
for the North Central Region, issued by the North Dakota Agricultural
Experiment Station, North Dakota State University as North Central Regional
Publication No. 221 (Revised) October 1988.
B. Methods of Soil Analysis, Chemical and
Microbiological Properties edited by Alan Page et al., issued by the American
Society of Agronomy as Agronomy Monograph No. 9 (Madison, Wisconsin, Part 2,
second edition, 1982).
C.
Procedures for Collecting Soil Samples and Methods of Analysis for Soil Survey,
issued by the Natural Resources Conservation Service as Soil Survey
Investigations Report 1 (revised) (Washington, D.C., United States Government
Printing Office, 1984).
Subp.
2.
Soil permeability.
The documents in items A and B are incorporated by reference
for determining soil permeability measurements for different soil types and
soil horizons when the information is not available from the Natural Resources
Conservation Service. These references are not subject to frequent change and
are available through the Minitex interlibrary loan system or addresses
given.
A. Determination by direct
measurements in the field as outlined in chapter 29, Hydraulic Conductivity of
Saturated Soils: Field Methods, in Methods of Soil Analysis, Physical and
Mineralogical Methods, edited by Klute, issued by the American Society of
Agronomy, 677 South Segoe Road, Madison, Wisconsin 53711, as Agronomy Monograph
No. 9, Part 1, (Madison, Wisconsin, second edition 1986).
B. Determination in the laboratory using
undisturbed soil samples as outlined in chapter 28, Hydraulic Conductivity and
Diffusivity: Laboratory Methods in Methods of Soil Analysis, edited by Klute,
issued by the American Society of Agronomy, 677 South Segoe Road, Madison,
Wisconsin 53711, as Agronomy Monograph No. 9, Part 1, (Madison, Wisconsin,
second edition 1986).
Subp.
3.
Seasonal high water table.
When the necessary information for determining the depth to and
type of seasonal water table is not available from the Natural Resources
Conservation Service, the information may be obtained from either the document
in item A or the procedure identified in item B.
A. Determination of the depth of soil having
mottles with a chroma of two or less as discussed in Keys to Soil Taxonomy,
(2010 and as subsequently amended), issued by the United States Department of
Agriculture, Natural Resources Conservation Service. The document is
incorporated by reference, is subject to frequent change, and is available at
http://soils.usda.gov/technical/classification/tax_keys/.
B. Measurement of water levels at monthly
intervals over the course of one year in water table monitoring devices. The
highest water level measurement obtained is acceptable as the seasonal high
water table.
Statutory Authority: MS s
116.07
