5.1 This test method is useful for determining the quantity of fibers in a peat or organic soil specimen. Fiber content is one parameter used to classify the peat as determined in Classification D4427. It is also a significant parameter in predicting or defining the many end uses of these materials. In this regard, fiber content has been related to agricultural and horticultural end uses (such as mulching and soil enrichment), geotechnical measurements (such as strength, compressibility, and permeability), industrial chemical uses (such as production of waxes, activated carbon, and medicines), and energy uses (such as direct combustion, methanol production, and gas yields).

Note 1: The quality of the result produced by this standard is dependent on the competence of the personnel performing it, and the suitability of the equipment and facilities used. Agencies that meet the criteria of Practice D3740 are generally considered capable of competent and objective testing/sampling/inspection/etc. Users of this standard are cautioned that compliance with Practice D3740 does not in itself assure reliable results. Reliable results depend on many factors; Practice D3740 provides a means of evaluating some of those factors.

1.1 This test method covers the laboratory determination of the fiber content of peat and organic soils by dry mass. Classification D4427 provides the methodology to classify peat as it is used in this standard.

1.2 Pieces of plant material such as roots or wood, larger than 20 mm in smallest dimension are not considered fibers.

1.3 Because this test method is simple and does not need sophisticated equipment in order to be performed, it is especially recommended for routine reconnaissance work where large numbers of samples need to be tested and mineral contents are low.

1.4 Units—The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard. Alternate sieve designations in parentheses are as provided in Specification E11.

1.5 All observed and calculated values shall conform to the guidelines for significant digits and rounding established in Practice D6026.

1.6 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety, health, and environmental practices and determine the applicability of regulatory limitations prior to use.

1.7 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.