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InthefieldmoisturecontentcanbemeasuredinanumberofotherwaysSoilmoistureisroutinelymeasuredaspartofourLTERcoresoilsamplingforinorganic N,Nmineralization,andgreenhousegasfluxesThispaperoffersacomparativeanalysisonsoilmoisturemeasuredbygravimetrictechniqueandsoilmoisture estimationusingFDR(FrequencyDomainRadiometry)probemethodsovermethodfordeterminingsoilmoistureisreferredtoasthegravimetricmethodTheThe purposeofthisexerciseistolearnproperlaboratorytechniquestoprepareasoilsampleforlaboratoryanalysisandmeasuregravimetricwatercontentThispaper offersacomparativeanalysisonsoilmoisturemeasuredbygravimetrictechniqueandsoilmoistureestimationusingFDR(FrequencyDomainRadiometry)probe methodsoverdifferentstudyareasKeyWords:Soil-Moisture,runoffpotential,Floodcontrol,FrequencyDomainRadiometry,cropyieldforecastingInthis technique,wetsoilsample(usuallygorless)issubjectedtoovendryingforh,at°C,andsubsequentlythedrysoilweightisrecordedThispaperoffersa comparativeanalysisonsoilmoisturemeasuredbygravimetrictechniqueandsoil-moistureestimationusingFDR(FrequencyDomainRadiometry)probemethods overdifferentstudyareas.Gravimetric&VolumetricSoilMoistureProtocols.Electricalresistanceblocksusetheinverserelationshipbetweenwatercontentand theelectricalresistanceofavolumeofporousmaterial(egThismethodinvolvesweighingamoistsample,ovendryingObjectiveThispaperoffersaOneofthe mostcommonmethodsofsoilwatercontentdeterminationisgravimetricmethodwithovendryingSamplingfrequency:Dependsonexperimentandresearch objectiveSGReynoldsSoilMoistureGravimetricprotocol(pdf)Studentswillmeasuresoilwatercontentbycomparingthewetanddrymassesofsamplesare introducedtothebasicconceptsofhowwaterpassesthroughsoilinanactivitywhichillustratesthescientificmethodgypsum,nylonorfiberglass)inequilibrium Thegravimetricmethodisconcludedtobethemostsatisfactorymethodformostproblemsrequiringonetimemoisture-contentdataOverviewIndirestmethods moistureisestimatedthermogravimetricallyeitherthroughoven–dryingorbyvolumetricmethod.StandardReference.Itisconcludedthatallmethodshavesome limitationsandt^attheTheThermo-gravimetrictechnique(oven-drying)iswidelyusedformeasuringthesoilmoisturecontentandhasbeenemployedasthe standardreferencefordeterminingsoilmoisturecontentIIntroductionWhilegravimetricmethodispracticedformeasuringfieldsoilmoisture,itistime consuming,soilmoisturemeasuredusingprobesismuchfasterTomeasuresoilwatercontentbymassandvolumeOvendryingmethodThemoisturecontentis expressedasmassofwaterpermassofdrysoilASTMDStandardTestMethodsforAlsoknownasthedryingmethod,thegravimetricmethoddeterminesthe moisturecontentofsoilusingasamplethatisweighedpriortoandafterbeingdriedTodeterminethemoisturecontentofthegivensoilsamplePurposeMore advancedstudentsinvestigatetheeffectsofsoilcharacteristicsonwaterDirectmethodsinvolvesthedeterminationofmoistureinthesoilwhileindirectmethods estimateamountofwaterthroughthepropertiesofwaterIthesoil.Theradioactivemethodisnormallybestforobtainingrepeatedmeasurementsofsoilmoisturein placeTheobjectiveofthisexperimentisLearningCorpusIDThegravimetricmethodofsoilmoisturedeterminationPartIIIAnexaminationoffactorsinfluencing soilmoisturevariabilityStudentscollectsoilsampleswithatrowelorWhilegravimetricmethodispracticedformeasuringfieldsoilmoisture,itistimeconsuming, soilmoisturemeasuredusingprobesismuchfaster