Designation:D2977−22StandardPracticeforParticleSizeRangeofPeatMaterialsforHorticulturalPurposes1ThisstandardisissuedunderthefixeddesignationD2977;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.1.Scope*1.1Peatmaterialsconsistofparticleswithvarioussizes.Thispracticecoverstheseparationofpeatparticlesintocoarse,medium,andfinesizefractionsusingthe2.36mm(No.8)and0.850mm(No.20)sievesequippedwithcoverandbottompan.Thispracticeisapplicableforpeatmaterialsusedinthehorticulturalindustryandcanbeusedtoverifythedegreeofdecompositionofpeatandtodeterminetheforeignmattercontent.1.2Units—ThevaluesstatedinSIunitsaretoberegardedasstandard.Thevaluesgiveninparenthesesareprovidedforinformationonlyandarenotconsideredstandard.ReportingoftestresultsinunitsotherthanSIshallnotberegardedasnonconformancewiththisstandard.1.2.1Itiscommonpracticeintheengineering/constructionprofessiontoconcurrentlyusepoundstorepresentbothaunitofmass(lbm)andofforce(lbf).Thispracticeimplicitlycombinestwoseparatesystemsofunits;theabsoluteandthegravitationalsystems.Itisscientificallyundesirabletocom-binetheuseoftwoseparatesetsofinch-poundunitswithinasinglestandard.Asstated,thisstandardincludesthegravita-tionalsystemofinch-poundunitsanddoesnotuse/presenttheslugunitofmass.However,theuseofbalancesandscalesrecordingpoundsofmass(lbm)orrecordingdensityinlbm/ft3shallnotberegardedasnonconformancewiththisstandard.1.3AllobservedandcalculatedvaluesshallconformtotheguidelinesforsignificantdigitsandroundingestablishedinPracticeD6026.1.3.1Theproceduresusedtospecifyhowdataarecollected/recordedorcalculatedinthisstandardareregardedastheindustrystandard.Inaddition,theyarerepresentativeofthesignificantdigitsthatgenerallyshouldberetained.Theproce-duresuseddonotconsidermaterialvariation,purposeforobtainingthedata,specialpurposest...
