soil acidity on the palouse – digging deeper

SoilAcidityonthePalouse–DiggingDeeperJanuary4th,2018BanyansontheRidge–Pavilion

TheworkshopwillfeaturelocalexpertspresentingthemostcurrentresearchonsoilacidityforthePalouseregion,andwillprovideaforumtoaskandanswerquestions.Theworkshopisapprovedfor8CCAcreditsand

includeslunchandrefreshments.

SoilAcidityBeyondLimeandAluminumToxicity:SoilPhosphorusandSoilHealth–Dr.TabithaBrownoftheLatahSoilandWaterConservationDistrictandWSU

TabithaBrown,incollaborationwiththeUniversityofIdahoandLatahCountygrowers,hasbeenconductingon-farmresearchwithlimingacidicsoils.Shewilldiscussherfindingsonhowlimingaffectssoilaggregatestabilityandextractablesoilphosphorous.ShewillcomparesoilPextractionmethods,traditionallyusedforPalousesoils,withtheHaneyextractionmethod,promotedbyNRCS.TheHaneymethodwasthoughttobeabetterestimationonPsufficiencylevelbecausethetestmimicsrootzonePchemistry.TabithawillalsointroducethecausesofsoilacidityinPalousesoilsandlimemanagementstrategies.

SoilAcidityinthePalouse;What,Why,andHow–Dr.PaulCarter:ExtensionSpecialistforColumbiaCounty

PresentationwillincludesurveydatacollectedinColumbiaCountyandvariousotherlocationsinthePalouse,whywehaveanacidityproblem,andhowwearegoingtocontinuefarminginthefuture.Researchresultswillbepresentedthatincludetheuseoflimeapplicationsandadditionalmicronutrientsbasedonthesoiltestresults.ThesewillincludeevidenceofsoilpHchangesandwheatyieldresponses.

SoilandCropResponsetoLiminginNorthernIdahoOn-farmTesting–DougFinkelnburg:ExtensionSpecialistforNezPerceCounty&AssistantProfessoratUI

Soilandagronomicresponsestolimingadirectseededfieldinanannuallycroppeddrylandsystemwillbediscussed.ImplicationsforincreasedbroadleafandgrassyweedherbicideoptionsandcroprotationchoicesinthetreatmentswithstrongpHcorrectionsvstheuntreatedsoilswillbeexplored.

ManagementStrategiesCanAlleviatetheAccelerationofSoilAcidification–Dr.HaiyingTao:WSUCropsandSoilsAssociateProfessorandNutrientManagementSpecialist

Nitrogen-inducedsoilacidificationisagrowingconcerninwheatproducingstates.TheimpactofacidificationbyNfertilizationisrelatedtoapplicationrateandformofNfertilizer.Althoughlimingandsoilamendmentscanbeusedtoalleviatesoilacidity.ApplyingNattherightrate,rightform,righttiming,andrightlocationisakeytoreducingtherateofacidification.

UsingSoilBufferTeststoPredictLimeRequirement–CarolMcFarland:WSUDepartmentofCropsandSoil

DifferentsoilscanrequireverydifferentquantitiesoflimetoraisesoilpH.BufferTestsareaquickmethodthatsoiltestlabscanusetodeterminearecommendationforhowmuchlimetoapply.Thispresentationwillprovideanoverviewofhowbuffertestswork,andhowthedifferenttypesofthesetestsperformonPalousesoils.Theaudiencewillcomeawaywithanincreasedunderstandingofhowtousethisinformationontheirsoiltestreportstobetterunderstandlimerequirementsontheirsoils.

andLimeCalculator:Inthishands-onmini-workshop,wewillprovideanoverviewofhowtousetheonlinelimecalculatorprovidedbyWSUExtensionasadecisionsupporttool(attendeesareencouragedtobringtablets,laptops,orsmartphonestofullyparticipateinthisworkshop).LimeMaterialsandApplication:Dr.DaveHugginsUSDA-ARS

Inaninteractiveformat,Dr.HugginswilldiscussoptionsforchoosinglimematerialswithPalousesoils.Materialselection,notonlyaccountsforprice,butforconsiderationssuchasparticlesizeandpercentcalciumcarbonatetomakesuretheinvestmentgoesthefarthest.Discussionwillalsoincludemethodsofapplicationinno-tillsystems.

PanelDiscussionontheeffectsandmanagementofsoilacidity:

TheEconomicsofLowpHSoils–Dr.KatePainter:ExtensionEducatorfortheUniversityofIdahoinBonner’sFerry

Dr.PainterwillusedatafromtheresearchofDr.PaulCarterandDr.KurtSchroedertounpacktheeconomiclandscapeofsoilacidityonthePalouse.Thetalkwilldiscussthetrade-offsbetweenlimingornot,aswellasmaterialchoice,applicationrate,andhowtoframetheinvestmentforlimingintermsoffarmcapital.

Dr.KurtSchroeder,AssistantProfessorofCroppingSystemsfromUniversityofIdaho.Hisworkand

expertisecoverstheagronomyofsoilacidity,including:liming,crop

performanceinlowpHsoils,andhowlowsoilpHaffectssoilborndisease.

Dr.TaraSullivan,AssistantProfessorofSoilMicrobiologyatWSU.Herresearchfocuseson

microbialcommunitiesinlowpH,highAluminumsoilsinthePalouse.

Dr.DrewLyon,ProfessorandEndowedChairofSmallGrainsExtensionandResearch,WeedScienceatWSU.Hehasin-depthknowledgeoftheeffectsofsoilpHonherbicideresistanceandefficacy.