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  <xs:element id="odc_SalesOrTransfersBetweenGeographicAreas" abstract="false" name="SalesOrTransfersBetweenGeographicAreas" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
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  <xs:element id="odc_ConsolidatedStatementsOfStockholdersEquityAndOtherComprehensiveIncomeAbstract" abstract="true" name="ConsolidatedStatementsOfStockholdersEquityAndOtherComprehensiveIncomeAbstract" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
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  <xs:element id="odc_AnimalHealthandNutritionMember" abstract="true" name="AnimalHealthandNutritionMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="nonnum:domainItemType"/>
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  <xs:element id="odc_EquitySecuritiesInternationalCompaniesMember" abstract="true" name="EquitySecuritiesInternationalCompaniesMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="nonnum:domainItemType"/>
  <xs:element id="odc_BuildingsAndLeaseholdImprovementsMember" abstract="true" name="BuildingsAndLeaseholdImprovementsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="nonnum:domainItemType"/>
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</xs:schema>
