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适用范围：<p id="s00019">When physically evaluating a soil, relative to its suitability to support plant growth (primarily grasses), tests must be performed to determine the presence and amount of solid matter (organic and inorganic) compatibility that can determine potential air-void content and water-holding ability, and finally, deleterious materials.</p> <p id="s00020">Typical general ranges of soil content for suitable topsoils are presented in Specification D 5268<astmref rid="a00007">. It should be recognized, however, that in some geographic regions, concurrence with the values in the referenced table would be difficult. In such situations, locally acceptable specifications need to be developed.</p><p id="s00002">1.1 This guide covers the material characteristics, physical requirements, and sampling appropriate for the designation of the material as a mineral amendment.</p> <p id="s00003">1.2 The presence in the topsoil of the correct nutrient and pH level is necessary for healthy plant growth. This guide does not, however, cover a determination of the nutrients, nor their availability. <p class="desc"> <span class="smallcap">Note</span> 18212;The nutrient content of topsoil is important and the chemicals usually evaluated are nitrogen, phosphate, and potassium. Nutrient deficiencies may be corrected by using fertilizers. Excess soluble salts should be examined as to their desirability. The acidity or alkalinity of the soil is also important. Excess acidity may be corrected by the application of lime dust. Excess alkalinity may be corrected by the application of sulfur or other suitable acidifying compounds. The latter item, in addition to lowering pH, also could be considered as an aggregate when considering the particle size distribution.</p> </p> <p id="s00004">1.3 The values stated in SI units are to be regarded as the standard. The values given in parentheses are for information only.</p> <p id="s00005">1.4 <span class="italic">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 and health practices and determine the applicability of regulatory limitations prior to use.</span> <p id="s00027">1.5 <span class="italic">This guide offers an organized collection of information or a series of options and does not recommend a specific course of action. This document cannot replace education or experience and should be used in conjunction with professional judgment. Not all aspects of this guide may be applicable in all circumstances. This ASTM standard is not intended to represent or replace the standard of care by which the adequacy of a given professional service must be judged, nor should this document be applied without consideration of a project''s many unique aspects. The word <span class=''unicode''>x201C;</span>Standard<span class=''unicode''>x201D;</span> in the title of this document means only that the document has been approved through the ASTM consensus process.</span></p>