Designation:D2976−22aStandardTestMethodforpHofPeatMaterials1ThisstandardisissuedunderthefixeddesignationD2976;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.1.Scope*1.1ThistestmethodcoversthemeasurementofthepHofpeatmaterialsusedasagrowingmedium.Thismeasurementdeterminesthedegreeofacidityoralkalinityinpeatmaterialssuspendedinwateranda0.01Mcalciumchloridesolution.Measurementsinbothliquidsarenecessarytofullydefinethepeat’spH.Thisvariableisusefulinassessingtheviabilityofthepeat-plantenvironment.Thistestmethoddoesnotapplytopeatthatisinpaperorconstructionmaterials.TestMethodD4972isusedforpHtestingofsoilsandTestMethodG51isusedforpHtestingofsoilsforcorrosionanalysis(seeNote1).NOTE1—Thesethreestandardsarebeingintentionallykeptseparateforclarityattherequestofthevarioussubcommittees.1.2Units—ThevaluesgiveninSIunitsaretoberegardedasthestandard.Nootherunitsofmeasurementareincludedinthisstandard.1.3AllmeasuredandcalculatedvaluesshallconformtotheguidelinesforsignificantdigitsandroundingestablishedinPracticeD6026.1.3.1Theproceduresusedtospecifyhowdataarecollected/recordedandcalculated,inthisstandardareregardedastheindustrystandard.Inaddition,theyarerepresentativeofthesignificantdigitsthatgenerallyshouldberetained.Theproce-duresuseddonotconsidermaterialvariation,purposeforobtainingthedata,specialpurposestudies,oranyconsider-ationsfortheuser’sobjectives;anditiscommonpracticetoincreaseorreducesignificantdigitsofreporteddatatobecommensuratewiththeseconsiderations.Itisbeyondthescopeofthisstandardtoconsidersignificantdigitsusedinanalysismethodsforengineeringdesign.1.4Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappro-priatesafety,health,andenvironmentalpracticesanddeter-minetheapp...
