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Proc-Type: 2001,MIC-CLEAR
Originator-Name: webmaster@www.sec.gov
Originator-Key-Asymmetric:
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 TWSM7vrzLADbmYQaionwg5sDW3P6oaM5D3tdezXMm7z1T+B+twIDAQAB
MIC-Info: RSA-MD5,RSA,
 HyzamkHfzgP68wqt6cBY6BqvjShWUFgdOu7aH2gL58CZlly65IfghribULiPceQx
 zVd7uhdQlyqkpc5q5cJ/Kg==

<SEC-DOCUMENT>0001104659-10-019482.txt : 20100413
<SEC-HEADER>0001104659-10-019482.hdr.sgml : 20100413
<ACCEPTANCE-DATETIME>20100413153147
ACCESSION NUMBER:		0001104659-10-019482
CONFORMED SUBMISSION TYPE:	3
PUBLIC DOCUMENT COUNT:		1
CONFORMED PERIOD OF REPORT:	20100405
FILED AS OF DATE:		20100413
DATE AS OF CHANGE:		20100413

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			Koch Philipp P
		CENTRAL INDEX KEY:			0001329559

	FILING VALUES:
		FORM TYPE:		3
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	001-08520
		FILM NUMBER:		10747137

	MAIL ADDRESS:	
		STREET 1:		C/O CF INDUSTRIES, INC.
		STREET 2:		ONE SALEM LAKE DRIVE
		CITY:			LONG GROVE
		STATE:			IL
		ZIP:			60047

ISSUER:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			TERRA INDUSTRIES INC
		CENTRAL INDEX KEY:			0000722079
		STANDARD INDUSTRIAL CLASSIFICATION:	AGRICULTURE CHEMICALS [2870]
		IRS NUMBER:				521145429
		STATE OF INCORPORATION:			MD
		FISCAL YEAR END:			1231

	BUSINESS ADDRESS:	
		STREET 1:		600 FOURTH ST
		STREET 2:		PO BOX 6000
		CITY:			SIOUX CITY
		STATE:			IA
		ZIP:			51102-6000
		BUSINESS PHONE:		7122771340

	MAIL ADDRESS:	
		STREET 1:		600 FOURTH STREET
		STREET 2:		PO BOX 6000
		CITY:			SIOUX CITY
		STATE:			IA
		ZIP:			51102-6000

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	INSPIRATION RESOURCES CORP
		DATE OF NAME CHANGE:	19920517
</SEC-HEADER>
<DOCUMENT>
<TYPE>3
<SEQUENCE>1
<FILENAME>a3.xml
<DESCRIPTION>3
<TEXT>
<XML>
<?xml version="1.0"?>
<ownershipDocument>

    <schemaVersion>X0203</schemaVersion>

    <documentType>3</documentType>

    <periodOfReport>2010-04-05</periodOfReport>

    <noSecuritiesOwned>1</noSecuritiesOwned>

    <issuer>
        <issuerCik>0000722079</issuerCik>
        <issuerName>TERRA INDUSTRIES INC</issuerName>
        <issuerTradingSymbol>TRA</issuerTradingSymbol>
    </issuer>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001329559</rptOwnerCik>
            <rptOwnerName>Koch Philipp P</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>C/O CF INDUSTRIES HOLDINGS, INC.</rptOwnerStreet1>
            <rptOwnerStreet2>4 PARKWAY NORTH, SUITE 400</rptOwnerStreet2>
            <rptOwnerCity>DEERFIELD</rptOwnerCity>
            <rptOwnerState>IL</rptOwnerState>
            <rptOwnerZipCode>60015</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>1</isDirector>
            <isOfficer>0</isOfficer>
            <isTenPercentOwner>0</isTenPercentOwner>
            <isOther>0</isOther>
        </reportingOwnerRelationship>
    </reportingOwner>

    <ownerSignature>
        <signatureName>/s/ Philipp P. Koch</signatureName>
        <signatureDate>2010-04-05</signatureDate>
    </ownerSignature>
</ownershipDocument>
</XML>
</TEXT>
</DOCUMENT>
</SEC-DOCUMENT>
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