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1、Title430–NationalSoilSurveyHandbookPart618–SoilPropertiesandQualitiesSubpartA–GeneralInformation618.0DefinitionandPurposeA.Soilpropertiesaremeasuredorinferredfromdirectobservationsinthefieldorlaboratory.Examplesofsoilpropertiesareparticle-sizedistribution,cation-exchangecapacit
2、y,andsalinity.B.Soilqualitiesarebehaviorandperformanceattributesthatarenotdirectlymeasured.Theyareinferredfromobservationsofdynamicconditionsandfromsoilproperties.Examplesofsoilqualitiesarecorrosivity,naturaldrainage,frostaction,andwinderodibility.C.Soilpropertiesandsoilqualiti
3、esarethecriteriausedinsoilinterpretations,aspredictorsofsoilbehavior,andforclassificationandmappingofsoils.ThesoilpropertiesenteredintheNationalSoilInformationSystem(NASIS)mustberepresentativeofthesoilandthedominantlanduseforwhichtheinterpretationsarebased.618.1PolicyandRespons
4、ibilitiesA.Soilpropertydataarecollected,tested,andcorrelatedaspartofsoilsurveyoperations.Thesedataarereviewed,supplemented,andrevisedasnecessary.B.TheMajorLandResourceAreasoilsurveyoffice(MLRASSO)isresponsibleforcollecting,testing,andcorrelatingsoilpropertydataandinterpretivecr
5、iteria.C.TheMLRAsoilsurveyregionaloffice(MO)isresponsibleforthedevelopment,maintenance,qualityassurance,correlation,andcoordinationofthecollectionofsoilpropertydatathatareusedasinterpretivecriteria.Thisincludesallthedataelementslistedbelow.D.TheNationalSoilSurveyCenter(NSSC)isr
6、esponsibleforthetraining,review,andperiodicupdateofsoilinterpretationtechnologies.E.TheStatesoilscientistisresponsibleforensuringthatthesoilinterpretationsareadequatefortheFieldOfficeTechnicalGuideandthattheymeettheneedsofFederal,State,andlocalprograms.618.2Collecting,Testing,a
7、ndPopulatingSoilPropertyDataA.Thecollectionandtestingofsoilpropertydataisbasedontheneedsdescribedinthesoilsurveymemorandumofunderstandingforindividualsoilsurveyareas.Thecollectionandtestingmustconformtotheproceduresandguidesestablishedinthishandbook.B.Asaggregatedcomponentdata,
8、soilpropertiesandqualitiesthatarepopulatedinNASISareno
