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  <xs:element id="odc_DeferredTaxLiabilityMember" abstract="true" name="DeferredTaxLiabilityMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="odc_LineOfCreditFacilityVariableInterestRatePrimeBased" abstract="false" name="LineOfCreditFacilityVariableInterestRatePrimeBased" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="dtr-types:percentItemType"/>
  <xs:element id="odc_LumpSumSettlementExpense" abstract="false" name="LumpSumSettlementExpense" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="odc_IntangibleAssetsWeightedAverageAmortizationPeriodAbstract" abstract="true" name="IntangibleAssetsWeightedAverageAmortizationPeriodAbstract" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
  <xs:element id="odc_ShelfNotes" abstract="false" name="ShelfNotes" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="odc_TrademarksandPatentsMember" abstract="true" name="TrademarksandPatentsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="odc_Trademarksandpatents" abstract="false" name="Trademarksandpatents" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="odc_TrademarksandpatentsaccumulatedAmortization" abstract="false" name="TrademarksandpatentsaccumulatedAmortization" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="odc_Netdepreciableassets" abstract="false" name="Netdepreciableassets" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="odc_ConsolidatedStatementsOfCashFlowsAbstract" abstract="true" name="ConsolidatedStatementsOfCashFlowsAbstract" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
  <xs:element id="odc_DeferredTaxAssetMember" abstract="true" name="DeferredTaxAssetMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="odc_StockBasedCompensationAbstract" abstract="true" name="StockBasedCompensationAbstract" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
  <xs:element id="odc_SeriesBSeniorNotesMember" abstract="true" name="SeriesBSeniorNotesMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="odc_OfFundAssetsInvestedInNonUsStocks" abstract="false" name="OfFundAssetsInvestedInNonUsStocks" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:percentItemType"/>
  <xs:element id="odc_CombinedSettlementandCurtailmentGainLossafterTax" abstract="false" name="CombinedSettlementandCurtailmentGainLossafterTax" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="odc_SummaryOfSignificantAccountingPoliciesAbstract" abstract="true" name="SummaryOfSignificantAccountingPoliciesAbstract" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
  <xs:element id="odc_ForeignandStateTaxStatuteOfLimitations" abstract="false" name="ForeignandStateTaxStatuteOfLimitations" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:durationItemType"/>
  <xs:element id="odc_CARESActCurrentPayrollTaxDeferral" abstract="false" name="CARESActCurrentPayrollTaxDeferral" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="odc_ConsolidatedStatementsOfStockholdersEquityAndOtherComprehensiveIncomeAbstract" abstract="true" name="ConsolidatedStatementsOfStockholdersEquityAndOtherComprehensiveIncomeAbstract" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
  <xs:element id="odc_CorporateExpenses" abstract="false" name="CorporateExpenses" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="odc_TradePromotionsPolicyTextBlock" abstract="false" name="TradePromotionsPolicyTextBlock" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:textBlockItemType"/>
  <xs:element id="odc_DeferredTaxAssetForeignSubsidiaries" abstract="false" name="DeferredTaxAssetForeignSubsidiaries" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="odc_DeferredTaxAssetLeaseLiabilities" abstract="false" name="DeferredTaxAssetLeaseLiabilities" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="odc_EmployeeBenefitPlansAbstract" abstract="true" name="EmployeeBenefitPlansAbstract" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
  <xs:element id="odc_AmountBackedbyUSGovernment" abstract="false" name="AmountBackedbyUSGovernment" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="odc_CommodityBasedInvestmentsMember" abstract="true" name="CommodityBasedInvestmentsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="odc_CARESAct2021DeferredPayrollTaxPayment" abstract="false" name="CARESAct2021DeferredPayrollTaxPayment" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="odc_MineReclamationAndClosingAsset" abstract="false" name="MineReclamationAndClosingAsset" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="odc_DeferredCompensationAnnualTotal" abstract="false" name="DeferredCompensationAnnualTotal" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="odc_DeferredTaxAssetLiabilityAxis" abstract="true" name="DeferredTaxAssetLiabilityAxis" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrldt:dimensionItem" type="xbrli:stringItemType"/>
  <xs:element id="odc_SegmentReportingInformationOperatingIncomeForReportableSegment" abstract="false" name="SegmentReportingInformationOperatingIncomeForReportableSegment" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="odc_OtherNoncurrentAssets" abstract="false" name="OtherNoncurrentAssets" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="odc_InternationalEquityMutualFundsDevelopedMarketsMember" abstract="true" name="InternationalEquityMutualFundsDevelopedMarketsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="odc_BuildingsAndLeaseholdImprovementsMember" abstract="true" name="BuildingsAndLeaseholdImprovementsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="odc_DeferredCompensationMember" abstract="true" name="DeferredCompensationMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="odc_CatLitterMember" abstract="true" name="CatLitterMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="odc_CARESAct2022DeferredPayrollTaxPayment" abstract="false" name="CARESAct2022DeferredPayrollTaxPayment" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="odc_IndustrialandSportsMember" abstract="true" name="IndustrialandSportsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="odc_SERPAbstract" abstract="true" name="SERPAbstract" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
  <xs:element id="odc_Preproductionoverburdenremovalcosts" abstract="false" name="Preproductionoverburdenremovalcosts" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="odc_Customerlistnet" abstract="false" name="Customerlistnet" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="odc_WeightedAverageSharesOutstandingAbstract" abstract="true" name="WeightedAverageSharesOutstandingAbstract" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
  <xs:element id="odc_ForeignOperationsMember" abstract="true" name="ForeignOperationsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="odc_DeferredCompensationAbstract" abstract="true" name="DeferredCompensationAbstract" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
</xs:schema>
