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  <xsd:element abstract="true" id="odc_CondensedConsolidatedStatementsOfComprehensiveIncomeAbstract" name="CondensedConsolidatedStatementsOfComprehensiveIncomeAbstract" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="odc_CondensedConsolidatedStatementsOfIncomeAndRetainedEarningsAbstract" name="CondensedConsolidatedStatementsOfIncomeAndRetainedEarningsAbstract" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration" />
  <xsd:element id="odc_CorporateExpenses" name="CorporateExpenses" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="duration" />
  <xsd:element id="odc_Customerlistaccumulatedamortization" name="Customerlistaccumulatedamortization" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="instant" />
  <xsd:element id="odc_Customerlistnet" name="Customerlistnet" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="instant" />
  <xsd:element id="odc_DefinedBenefitPlanVoluntaryContribution" name="DefinedBenefitPlanVoluntaryContribution" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="odc_DocumentAndEntityInformationAbstract" name="DocumentAndEntityInformationAbstract" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration" />
  <xsd:element id="odc_ImpactoneffectivetaxrateofadoptionofASU201609" name="ImpactoneffectivetaxrateofadoptionofASU201609" nillable="true" substitutionGroup="xbrli:item" type="num:percentItemType" xbrli:periodType="duration" />
  <xsd:element id="odc_IncreaseDecreaseInAccountsPayableAndIncomeTaxesPayable" name="IncreaseDecreaseInAccountsPayableAndIncomeTaxesPayable" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="duration" />
  <xsd:element id="odc_LifeInsuranceBenefits" name="LifeInsuranceBenefits" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="odc_NewAccountingPronouncementsAbstract" name="NewAccountingPronouncementsAbstract" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration" />
  <xsd:element id="odc_NewAccountingPronouncementsTextBlock" name="NewAccountingPronouncementsTextBlock" nillable="true" substitutionGroup="xbrli:item" type="nonnum:textBlockItemType" xbrli:periodType="duration" />
  <xsd:element id="odc_OverburdenRemovalAndMiningCostsPolicyTextBlock" name="OverburdenRemovalAndMiningCostsPolicyTextBlock" nillable="true" substitutionGroup="xbrli:item" type="nonnum:textBlockItemType" xbrli:periodType="duration" />
  <xsd:element id="odc_PackagingInventory" name="PackagingInventory" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="instant" />
  <xsd:element abstract="true" id="odc_RecentlyAdoptedPronouncementsAbstract" name="RecentlyAdoptedPronouncementsAbstract" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="odc_RetailAndWholesaleSegmentMember" name="RetailAndWholesaleSegmentMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element id="odc_SegmentReportingInformationOperatingIncomeForReportableSegment" name="SegmentReportingInformationOperatingIncomeForReportableSegment" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="duration" />
  <xsd:element id="odc_Sharebasedcompensationarrangementbysharebasedpaymentawardvestingperiodmaximum" name="Sharebasedcompensationarrangementbysharebasedpaymentawardvestingperiodmaximum" nillable="true" substitutionGroup="xbrli:item" type="us-types:durationStringItemType" xbrli:periodType="duration" />
  <xsd:element id="odc_Sharebasedcompensationarrangementbysharebasedpaymentawardvestingperiodminimum" name="Sharebasedcompensationarrangementbysharebasedpaymentawardvestingperiodminimum" nillable="true" substitutionGroup="xbrli:item" type="us-types:durationStringItemType" xbrli:periodType="duration" />
  <xsd:element id="odc_TaxCutsAndJobsActOf2017ProvisionalIncomeTaxExpenseRelatedToRemeasurementOfDeferredTaxAssets" name="TaxCutsAndJobsActOf2017ProvisionalIncomeTaxExpenseRelatedToRemeasurementOfDeferredTaxAssets" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="duration" />
  <xsd:element id="odc_TaxCutsAndJobsActReclassificationFromAOCIToRetainedEarnings" name="TaxCutsAndJobsActReclassificationFromAOCIToRetainedEarnings" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="duration" />
  <xsd:element id="odc_TaxCutsAndJobsActof2017EffectiveIncomeTaxRateReconciliationAtFederalBlendedStatutoryIncomeTaxRate" name="TaxCutsAndJobsActof2017EffectiveIncomeTaxRateReconciliationAtFederalBlendedStatutoryIncomeTaxRate" nillable="true" substitutionGroup="xbrli:item" type="num:percentItemType" xbrli:periodType="duration" />
  <xsd:element id="odc_TaxCutsandJobsActof2017ProvisionalChargeRelatedToCumulativeUnrepatriatedForeignEarnings" name="TaxCutsandJobsActof2017ProvisionalChargeRelatedToCumulativeUnrepatriatedForeignEarnings" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="duration" />
  <xsd:element id="odc_TrademarksandpatentsaccumulatedAmortization" name="TrademarksandpatentsaccumulatedAmortization" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="instant" />
  <xsd:element id="odc_Trademarksandpatentsnet" name="Trademarksandpatentsnet" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="instant" />
  <xsd:element abstract="true" id="odc_WeightedAverageSharesOutstandingAbstract" name="WeightedAverageSharesOutstandingAbstract" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration" />
</xsd:schema>
