Document:

Amended and Restated Credit Agreement dated January 26, 2005

 Exhibit 4.3 
  
 AMENDMENT No. 1 TO THE AMENDED AND RESTATED CREDIT AGREEMENT 
  
 AMENDMENT NO. 1 (this
“Amendment”), dated as and of January 26, 2005, among TERRA CAPITAL, INC., a Delaware corporation (“Terra Capital”), MISSISSIPPI
CHEMICAL CORPORATION, a Mississippi corporation (“MCC”), and TERRA NITROGEN (U.K.), LIMITED, a company incorporated in England and Wales
(“Terra UK”) (Terra Capital, MCC and Terra UK each a “Borrower” and, collectively, the “Borrowers”), TERRA INDUSTRIES INC., a Maryland corporation
(“Terra Industries”), TERRA CAPITAL HOLDINGS INC., a Delaware corporation (“Terra Capital Holdings”), and the Lenders party hereto, amends certain
provisions of the AMENDED AND RESTATED REVOLVING CREDIT AGREEMENT, dated as of December 21, 2004 (as amended hereby and as the same may be further
amended, supplemented or otherwise modified from time to time, the “Credit Agreement”), among the Borrowers, Terra Industries, Terra Capital Holdings, the financial institutions from time to time party thereto as lenders (the
“Lenders”), the financial institutions from time to time party thereto as issuing banks (the “Issuers”) and CITICORP USA, INC., as administrative agent and collateral agent for the
Lenders and the Issuers (in such capacities, the “Administrative Agent”). 
  
 W I T N E S S E T H: 
  
 WHEREAS, pursuant to the Credit Agreement, the Lenders have agreed to make Loans to the Borrowers and to issue, and have issued, Letters of Credit for the account of the Borrowers; and 
  
 WHEREAS, in connection with certain Investments in cash and Cash Equivalents
held outside the United States, the Borrowers, Terra Industries and Terra Capital Holdings have requested, and the Requisite Lenders and the Administrative Agent have agreed to, certain amendments to, and waivers under, the Credit Agreement as more
specifically set forth below. 
  
 NOW, THEREFORE, in consideration
of the premises and the mutual covenants and provisions hereinafter contained, the parties hereto hereby agree as follows: 
  
 1. Defined Terms. Capitalized terms used herein and not defined herein but defined in the Credit Agreement are used herein as defined in the
Credit Agreement. 
  
 2. Amendments to the Credit
Agreement. Upon the occurrence of the First Amendment Effective Date (as defined in Section 4), the Credit Agreement is hereby amended as of December 21, 2004 by inserting the following at the end of clause (ii) of
Section 8.3(b) of the Credit Agreement: “at any time beginning 30 days after the Effective Date.” 
  
 3. Waiver. Upon the occurrence of the First Amendment Effective Date, the Administrative Agent and the Lenders waive all Defaults and Events
of Default arising under Section 8.3(b)(ii) of the Credit Agreement occurring prior to the First Amendment Effective Date (the “Specified Default”). 
  

 1 

 4. Conditions Precedent to the Effectiveness of this Amendment. This Amendment shall become
effective, as of December 21, 2004, on the date (the “First Amendment Effective Date”) when the following conditions precedent have been satisfied: 
  
 (a) Certain Documents. The Administrative Agent shall have received, on or before the First Amendment Effective
Date, in form and substance satisfactory to the Administrative Agent, this Amendment, executed by each Borrower, Terra Industries, Terra Capital Holdings, the Administrative Agent and the Lenders constituting the Requisite Lenders. 
  
 (b) Representations and Warranties. Each of the representations and
warranties made by the Borrowers or the Guarantors in or pursuant to the Credit Agreement, as amended hereby, and the other Loan Documents to which any of the Borrowers or the Guarantors is a party or by which the Borrowers or the Guarantors are
bound, shall be true and correct in all material respects on and as of the First Amendment Effective Date (other than representations and warranties in any such Loan Document which expressly speak as of a specific date, which shall have been true
and correct in all material respects as of such specific date). 
  
 (c) No Event of Default. Except for the Specified Default, no Default or Event of Default shall have occurred and be continuing on the First Amendment Effective Date. 
  
 (d) Past Expenses Paid. The Borrowers shall have paid, in accordance with Section 11.3 of the Credit Agreement,
all outstanding costs and expenses of the Administrative Agent, including the reasonable fees and out-of-pocket expenses of counsel for the Administrative Agent incurred prior to or otherwise in connection with this Amendment. 
  
 5. Representations and Warranties. On and as of the date
hereof, and as of the First Amendment Effective Date, after giving effect to this Amendment, each Borrower, Terra Industries and Terra Capital Holdings hereby represents and warrants to the Lenders as follows: 
  
 (a) Each of the representations and warranties contained in Article IV
of the Credit Agreement, the other Loan Documents or in any certificate, document or financial or other statement furnished at any time under or in connection therewith are true and correct in all material respects on and as of the date as if made
on and as of such date, except to the extent that such representations and warranties specifically relate to a specific date, in which case such representations and warranties shall be true and correct in all material respects as of such specific
date; provided, however, that references therein to the “Credit Agreement” shall be deemed to include this Amendment; and 
  
 (b) No Default or Event of Default has occurred and is continuing. 
  
 6. Continuing Effect; No other Amendments or Waivers. Except as expressly amended hereby or waiver herein, all
of the terms and provisions of the Credit Agreement and the other Loan Documents are, and shall remain, in full force and effect. The amendments and consents contained herein shall not constitute an amendment or a waiver of any other provision of
the Credit Agreement or the other Loan Documents or for any purpose except as expressly set forth herein. 
  
 7. Loan Documents. This Amendment is deemed to be a “Loan Document” for the purposes of the Credit Agreement. 

 
 8. Costs and Expenses. The Borrowers, Terra Industries and
Terra Capital Holdings agree to pay on demand all reasonable and documented out-of-pocket costs and expenses of the Administrative Agent in connection with the preparation, execution and delivery 
  

 2 

 of this Amendment and other instruments and documents to be delivered pursuant hereto, including the reasonable and
documented fees and out-of-pocket expenses of counsel for the Administrative Agent with respect thereto. 
  
 9. Governing Law; Counterparts; Miscellaneous. 
  
 (a) This Amendment shall be governed by, and construed and interpreted in accordance with, the law of the State of New York. 
  
 (b) This Amendment may be executed in any number of counterparts and by the
different parties on separate counterparts, each of which counterparts when executed and delivered shall be an original, but all of which shall together constitute one and the same instrument. 
  
 (c) Section captions used in this Amendment are for convenience only and
shall not affect the construction of this Amendment. 
  
 (d) From
and after the First Amendment Effective Date, all references in the Credit Agreement to the “Agreement” shall be deemed to be references to such Agreement as modified hereby and this Amendment and the Credit Agreement shall be read
together and construed as a single instrument. 
  
 [signature pages
follow] 
  

 3 

 IN WITNESS WHEREOF, the undersigned parties have executed this Amendment No. 1 to the Amended and
Restated Credit Agreement to be effective for all purposes as of December 21, 2004. 
  

			
	 Borrowers

	
	 TERRA CAPITAL, INC.

		
	 By:
	 	 /s/ Wynn S. Stevenson

	 Name:
	 	 Wynn S. Stevenson

	 Title:
	 	 Vice President & Treasurer

	
	 MISSISSIPPI CHEMICAL CORPORATION

		
	 By:
	 	 /s/ Mark A. Kalafut

	 Name:
	 	 Mark A. Kalafut

	 Title:
	 	 Vice President

	
	 TERRA NITROGEN (U.K.), LIMITED

		
	 By:
	 	 /s/ Mark A. Kalafut

	 Name:
	 	 Mark A. Kalafut

	 Title:
	 	 Secretary

	
	 Guarantors

	
	 TERRA INDUSTRIES INC.

		
	 By:
	 	 /s/ Wynn S. Stevenson

	 Name:
	 	 Wynn S. Stevenson

	 Title:
	 	 Vice President, Taxes and
 Corporate Development

	
	 TERRA CAPITAL HOLDINGS INC.

		
	 By:
	 	 /s/ Wynn S. Stevenson

	 Name:
	 	 Wynn S. Stevenson

	 Title:
	 	 Vice President & Treasurer

  

 SIGNATURE PAGE TO AMENDMENT NO. 1 

			
	 Administrative Agent

	
	 CITICORP USA, INC.

		
	 By:
	 	 /s/ Miles D. McManus

	 Name:
	 	 Miles D. McManus

	 Title:
	 	 Vice President and Director

	
	 Lenders

	
	 CITICORP USA, INC.

		
	 By:
	 	 /s/ Miles D. McManus

	 Name:
	 	 Miles D. McManus

	 Title:
	 	 Vice President and Director

	
	 WELLS FARGO FOOTHILL, INC.

		
	 By:
	 	 /s/ Dennis King

	 Name:
	 	 Dennis King

	 Title:
	 	 Vice President

	
	 LASALLE BANK NATIONAL ASSOCIATION

		
	 By:
	 	  

	 Name:
	 	 
	 Title:
	 	 
	
	 CONGRESS FINANCIAL CORP.

		
	 By:
	 	  

	 Name:
	 	 
	 Title:
	 	 
	
	 GENERAL ELECTRIC CAPITAL CORPORATION

		
	 By:
	 	 /s/ Dennis W. Cloud

	 Name:
	 	 Dennis W. Cloud

	 Title:
	 	 Duly Authorized Signatory

  

 SIGNATURE PAGE TO AMENDMENT NO. 1 

			
	 NATIONAL CITY BUSINESS CREDIT,
INC.

		
	 By:
	 	 /s/ Thomas J. Evans

	 Name:
	 	 Thomas J. Evans

	 Title:
	 	 Senior Associate

  

 SIGNATURE PAGE TO AMENDMENT NO. 1Amended and Restricted Credit Agreement

 Exhibit 4.4 
  

AMENDMENT NO. 2 TO THE AMENDED AND RESTATED CREDIT AGREEMENT 
  
 AMENDMENT NO. 2 (this “Amendment”), dated as of July 29, 2005,
among TERRA CAPITAL, INC., a Delaware corporation (“Terra Capital”), TERRA MISSISSIPPI HOLDINGS CORP.
(F/K/A MISSISSIPPI CHEMICAL CORPORATION), a Mississippi corporation (“TMH”), and TERRA NITROGEN (U.K.)
LIMITED, a company incorporated in England and Wales (“Terra UK”) (Terra Capital, TMH and Terra UK each a “Borrower” and, collectively, the “Borrowers”), TERRA
INDUSTRIES INC., a Maryland corporation (“Terra Industries”), TERRA CAPITAL HOLDINGS, INC., a Delaware corporation (“Terra Capital
Holdings”), the Lenders party hereto and CITICORP USA, INC., as administrative agent and collateral agent for the Lenders and the Issuers (in such capacities, the “Administrative Agent”),
amends certain provisions of the AMENDED AND RESTATED CREDIT AGREEMENT, dated as of December 21, 2004 (as amended by Amendment No. 1 to the Amended and Restated
Credit Agreement, dated as of January 26, 2005 and as further amended hereby and as the same may be further amended, supplemented or otherwise modified from time to time, the “Credit Agreement”), among the Borrowers, Terra
Industries, Terra Capital Holdings, the financial institutions from time to time party thereto as lenders (the “Lenders”), the financial institutions from time to time party thereto as issuing banks (the “Issuers”)
and the Administrative Agent. 
  
 W I T N E S S E T H:

  
 WHEREAS, pursuant to the Credit Agreement, the Lenders
have agreed to make Loans to the Borrowers and to issue Letters of Credit for the account of the Borrowers; and 
  
 WHEREAS, the Borrowers, Terra Industries and Terra Capital Holdings have requested, and the Requisite Lenders and the Administrative Agent have agreed to,
certain amendments to the Credit Agreement as more specifically set forth below. 
  
 NOW, THEREFORE, in consideration of the premises and the mutual covenants and provisions hereinafter contained, the parties hereto hereby agree as follows: 
  
 1. Defined Terms. Capitalized terms used herein and not
defined herein but defined in the Credit Agreement are used herein as defined in the Credit Agreement. 
  
 2. Amendments to the Credit Agreement. As of the Second Amendment Effective Date (as defined in Section 4), the Credit Agreement
is hereby amended as follows: 
  
 (a) Amendments to
Section 1.1. Section 1.1 of the Credit Agreement is hereby amended as follows: 
  
 (i) by inserting the following after the definition of “Stock Equivalents” and before the definition of “Subordinated Debt”: 
  
 “Stock Purchase” has the meaning
specified in Section 8.5(e) 
  
 (ii) by inserting the
following after the definition of “Syndication Agent” and before the definition of “Tax Affiliate”: 
  
 “T-Sub” means Terra Nitrogen Holdings GP Inc., a Delaware corporation. 
  

 1 

 (iii) by inserting the following after the definition of “TNCLP Minority Interest
Payments” and before the definition of “TNLP”: 
  
 “TNGP” means Terra Nitrogen GP Inc., a Delaware corporation. 
  
 (iv) by replacing “TNCLP and its Subsidiaries” with “TNCLP and TNGP and their respective Subsidiaries” (x) in the
definition of “Subsidiary” and (y) in the definition of “Cash Flow”; 
  
 (v) by deleting the definition of “Senior Second Lien Note Indenture” in its entirety and replacing it with the following: 

 
 “Senior Second Lien Note Indenture”
means the 11 1/2% Senior Second Lien Note Indenture dated May 21, 2003 between Terra Capital and the Senior
Second Lien Note Trustee. 
  
 (vi) by deleting “Senior Secured Note Indenture” and replacing it with “Senior Second Lien Note Indenture” in the
definition of “Senior Second Lien Note Trustee”; and 
  
 (vii) by deleting the definition of “Senior Second Lien Notes” in its entirety and replacing it with the following: 
  
 “Senior Second Lien Notes” means the 11 1/2% Second Priority Senior Secured Notes (including the Initial Notes and the Exchange Notes, as such terms are defined in the Senior Second Lien Note Indenture) due 2010 issued or
to be issued by Terra Capital pursuant to the Senior Second Lien Note Indenture. 
  
 (b) Amendments to Section 5.2. Section 5.2 of the Credit Agreement is hereby amended by inserting after “period” and
before “:” the following: 
  
 ,
provided that in Fiscal Year 2005 an additional $60,000,000 may be invested in a joint venture agreement relating to a new plant in Trinidad, whereby Terra Capital or another Loan Party would receive a 33% interest in such joint venture, so long
as the terms of the joint venture agreement are reasonably satisfactory to the Administrative Agent and no Default has occurred which is continuing, or could result, upon such joint venture agreement being entered into 
  
 (c) Amendment to Section 8.3. Section 8.3(k)(ii) of the
Credit Agreement is hereby amended by deleting “TNCLP and its Subsidiaries” and replacing it with “TNCLP, TNGP and their respective Subsidiaries”; 
  
 (d) Amendment to Section 8.4. Section 8.4 of the Credit Agreement is hereby amended as follows:

  
 (i) deleting subparagraph (f) in its entirety and
replacing it with the following: 
  
 (f) any
other Asset Sales (including any disposition of assets to a joint venture by Terra Industries or its Subsidiaries) the aggregate Fair Market Value of which shall not exceed $20,000,000 in any Fiscal Year; 
  

 2 

 (ii) deleting “.” at the end of subparagraph (g) and replacing it with “;
and”; and 
  
 (iii) adding the following after
subparagraph (g): 
  
 (h) TNC may transfer
general partnership interests in TNCLP and TNLP to TNGP, and in connection with such transaction, Terra Capital may sell the promissory note issued by TNLP to Terra Capital in the face amount of $8,200,000 to TNLP. 
  
 (e) Amendments to Section 8.5. Section 8.5 of the Credit
Agreement is hereby amended as follows: 
  
 (i) in subsection
(c) deleting “and”; 
  
 (ii) in subsection
(d) (x) deleting “.” and (y) inserting in its place “; and”; and 
  
 (iii) after the “;” in subsection (d), inserting the following: 
  
 (e) Payments by Terra Capital to purchase the common Stock or preferred Stock of Terra Industries (the
“Stock Purchase”), if after giving effect to each Stock Purchase, the following conditions are satisfied: 
  
 (i) the aggregate amount of such Stock Purchases together with the aggregate amount of Common Unit Purchases and the Senior Note
Purchases, (A) made during any Repurchase Period does not exceed the Maximum Repurchase Amount applicable to such period or (B) made during any calendar year does not exceed $100,000,000; 
  
 (ii) the aggregate Available credit of the Borrowers on
the date of each Stock Purchase, after giving effect to the Stock Purchase (or any Senior Note Purchase or purchase of Common Units) to be made on such date, shall be at least $125,000,000 with respect to any such purchase; 
  
 (iii) Terra Industries has, as of the last day of the
most recent Fiscal Quarter or Fiscal Year for which Financial Statements have been delivered to the Administrative Agent pursuant to Section 6.1(b) or (c), Cash Flow for the four Fiscal Quarters ending on such day of at least
$100,000,000; 
  
 (iv) no Default or
Event of Default shall have occurred and be continuing, both immediately before and after giving effect to the making of any Stock Purchase; 
  
 (v) both before and after the making of any Stock Purchase, the representations and warranties set forth in Article IV and in the
other 
  

 3 

 Loan Documents shall be true and correct in all material respects on and as of the date of such Stock
Purchase with the same effect as though made on and as of such date, except to the extent such representations and warranties expressly relate to an earlier date; and 
  
 (vi) Terra Capital shall have delivered to the Administrative Agent a certificate executed by an officer
of Terra Capital certifying that the foregoing conditions have been met with respect to such Stock Purchase within three Business Days following the making of such purchase. 
  
 (f) Amendments to Section 8.8. Section 8.8 is hereby amended by inserting the following before the period
at the end of such section: 
  
 provided,
however, that the transactions described in Section 8.4(h) and the transactions in connection therewith shall be permitted 
  
 (g) Amendments to Section 8.12. Clause (A) of Section 8.12 is hereby amended by inserting after “Common Unit Purchases”
and before “,” the following: 
  
 and Stock Purchases 
  
 3. Consent.
Pursuant to Section 7.1 of the Amended and Restated Pledge and Security Agreement, dated as of October 10, 2001 (the “Security Agreement”), among Terra Capital, the other parties from time to time party thereto and the
Administrative Agent, and Section 11.1 of the Credit Agreement, each Lender hereby consents and authorizes the Administrative Agent to enter into an amendment to the Security Agreement to clarify that the Collateral does not extend to real
property or other fixed assets of the Loan Parties or the other Senior Secured Note Collateral. 
  
 4. Conditions Precedent to the Effectiveness of this Amendment. This Amendment shall become effective, as of the date hereof, on the date
(the “Second Amendment Effective Date”) when the following conditions precedent have been satisfied: 
  
 (a) Certain Documents. The Administrative Agent shall have received, on or before the Second Amendment Effective Date, all of the following, each
of which shall be in form and substance satisfactory to the Administrative Agent: 
  
 (i) this Amendment, executed by each Borrower, Terra Industries, Terra Capital Holdings, the Administrative Agent and the Lenders constituting the Requisite Lenders; 
  
 (ii) a Pledge Amendment, executed by Terra Capital, pledging its ownership
interests in T-Sub; 
  
 (iii) a Joinder Agreement to the Security
Agreement, executed by T-Sub; 
  
 (iv) a Guaranty Supplement,
executed by T-Sub; 
  
 (v) an opinion of Kirkland &
Ellis LLP in form and substance satisfactory to the Administrative Agent; 
  

 4 

 (vi) such additional documentation as the Administrative Agent or the Requisite Lenders may reasonably
require; and 
  
 (vii) a consent executed by each Guarantor in
the form attached hereto. 
  
 (b) Past Expenses Paid. The
Borrowers shall have paid in accordance with Section 11.3 of the Credit Agreement, all outstanding costs and expenses of the Administrative Agent, including the reasonable fees and out-of-pocket expenses of counsel for the Administrative Agent
incurred prior to or otherwise in connection with this Amendment. 
  
 5. Representations and Warranties. On and as of the date hereof, and as of the Second Amendment Effective Date, after giving effect to this Amendment, each Borrower, Terra Industries and Terra Capital Holdings hereby
represents and warrants to the Lenders as follows: 
  
 (a) Each
of the representations and warranties contained in Article IV of the Credit Agreement, the other Loan Documents or in any certificate, document or financial or other statement furnished at any time under or in connection therewith are true and
correct in all material respects on and as of the date as if made on and as of such date, except to the extent that such representations and warranties specifically relate to a specific date, in which case such representations and warranties shall
be true and correct in all material respects as of such specific date; provided, however, that references therein to the “Credit Agreement” shall be deemed to include this Amendment; and 
  
 (b) No Default or Event of Default has occurred and is continuing.

  
 6. Continuing Effect; No Other Amendments.
Except as expressly amended hereby, all of the terms and provisions of the Credit Agreement and the other Loan Documents are and shall remain in full force and effect. The amendments and consents contained herein shall not constitute an amendment or
a waiver of any other provision of the Credit Agreement or the other Loan Documents or for any other purpose except as expressly set forth herein. 
  
 7. Loan Documents. This Amendment is deemed to be a “Loan Document” for the purposes of the Credit Agreement. 

 
 8. Costs and Expenses. The Borrowers, Terra Industries and
Terra Capital Holdings agree to pay on demand all reasonable and documented out-of-pocket costs and expenses of the Administrative Agent in connection with the preparation, execution and delivery of this Amendment and other instruments and documents
to be delivered pursuant hereto, including the reasonable and documented fees and out-of-pocket expenses of counsel for the Administrative Agent with respect thereto. 
  
 9. Governing Law; Counterparts; Miscellaneous. 
  
 (a) This Amendment shall be governed by, and construed and interpreted in accordance with, the law of the State of New
York. 
  
 (b) This Amendment may be executed in any number of
counterparts and by the different parties on separate counterparts, each of which counterparts when executed and delivered shall be an original, but all of which shall together constitute one and the same instrument. 
  

 5 

 (c) Section captions used in this Amendment are for convenience only and shall not affect the
construction of this Amendment. 
  
 (d) From and after the Second
Amendment Effective Date, all references in the Credit Agreement to the “Agreement” shall be deemed to be references to such Agreement as modified hereby and this Amendment and the Credit Agreement shall be read together and construed as a
single instrument. 
  
 [signature pages follow] 
  

 6 

 IN WITNESS WHEREOF, the undersigned parties have executed this Amendment No. 2 to the Amended and
Restated Credit Agreement to be effective for all purposes as of the Second Amendment Effective Date. 
  

			
	Borrowers
	
	TERRA CAPITAL, INC.
		
	By:	 	 /s/ Mark A. Kalafut

	Name:	 	Mark A. Kalafut
	Title:	 	Vice President
	
	 TERRA MISSISSIPPI HOLDINGS CORPORATION
 (F/K/A MISSISSIPPI CHEMICAL CORPORATION)

		
	By:	 	 /s/ Mark A. Kalafut

	Name:	 	Mark A. Kalafut
	Title:	 	Vice President
	
	TERRA NITROGEN (U.K.) LIMITED
		
	By:	 	 /s/ W. Mark Rosenbury

	Name:	 	W. Mark Rosenbury
	Title:	 	Director
	
	Guarantor
	
	TERRA INDUSTRIES INC.
		
	By:	 	 /s/ Mark A. Kalafut

	Name:	 	Mark A. Kalafut
	Title:	 	Vice President
	
	TERRA CAPITAL HOLDINGS, INC.
		
	By:	 	 /s/ Mark A. Kalafut

	Name:	 	Mark A. Kalafut
	Title:	 	Vice President

  

 [SIGNATURE PAGE TO AMENDMENT NO. 2 TO TERRA CAPITAL CREDIT AGREEMENT] 

			
	Administrative Agent
	
	CITICORP USA, INC.
		
	By:	 	 /s/ Miles D. McManus

	Name:	 	Miles D. McManus
	Title:	 	Vice President and Director
	
	Lenders
	
	CITICORP USA, INC.
		
	By:	 	 /s/ Miles D. McManus

	Name:	 	Miles D. McManus
	Title:	 	Vice President and Director
	
	WELLS FARGO FOOTHILL, INC.
		
	By:	 	 /s/ Dennis King

	Name:	 	Dennis King
	Title:	 	Vice President
	
	LASALLE BANK NATIONAL ASSOCIATION
		
	By:	 	 /s/ Wayne Hillock

	Name:	 	Wayne Hillock
	Title:	 	SVP
	
	CONGRESS FINANCIAL CORP.
		
	By:	 	 /s/ Thomas A. Martin

	Name:	 	Thomas A. Martin
	Title:	 	Vice President
	
	GENERAL ELECTRIC CAPITAL CORPORATION
		
	By:	 	 /s/ Glenn Campbell

	Name:	 	Glenn Campbell
	Title:	 	Duly Authorized Signatory

  

 [SIGNATURE PAGE TO AMENDMENT NO. 2 TO TERRA CAPITAL CREDIT AGREEMENT] 

			
	NATIONAL CITY BUSINESS CREDIT, INC.
		
	By:	 	 /s/ Thomas J. Evans

	Name:	 	Thomas J. Evans
	Title:	 	Senior Associate
	
	 STATE OF CALIFORNIA PUBLIC
EMPLOYEES’
RETIREMENT SYSTEM

		
	By:	 	  

	Name:	 	 
	Title:	 	 

  

 [SIGNATURE PAGE TO AMENDMENT NO. 2 TO TERRA CAPITAL CREDIT AGREEMENT] 

 CONSENT OF GUARANTORS 
  
 Dated as of July 29,
2005                     
  
 Each of the undersigned companies, as a Guarantor under the Amended and Restated Guaranty dated October 10, 2001 (the “Guaranty”),
in favor of the Secured Parties under the Credit Agreement referred to in the foregoing Amendment, hereby consents to such Amendment and hereby confirms and agrees that notwithstanding the effectiveness of such Amendment, the Guaranty is, and shall
continue to be, in full force and effect and is hereby ratified and confirmed in all respects, except that, on and after the effectiveness of such Amendment, each reference in the Guaranty to the “Credit Agreement”,
“thereunder”, “thereof” or words of like import shall mean and be a reference to the Credit Agreement, as amended by such Amendment. 
  
 [Signature pages follow] 
  

 [SIGNATURE PAGE TO AMENDMENT NO. 2 TO TERRA CAPITAL CREDIT AGREEMENT] 

 IN WITNESS WHEREOF, the parties hereto have consented to this Amendment, as of the date first written
above. 
  

			
	 TERRA CAPITAL, INC.

	 TERRA MISSISSIPPI HOLDINGS CORPORATION (F/K/A MISSISSIPPI CHEMICAL CORPORATION)

	 TERRA INDUSTRIES INC.

	 TERRA CAPITAL HOLDINGS, INC.

	 TERRA NITROGEN CORPORATION

	 TERRA INTERNATIONAL, INC.

	 TERRA INTERNATIONAL (OKLAHOMA) INC.

	 PORT NEAL CORPORATION

	 TERRA METHANOL CORPORATION

	 BMC HOLDINGS INC.

	 BEAUMONT HOLDINGS CORPORATION

	 TERRA REAL ESTATE CORPORATION

	 BEAUMONT AMMONIA INC.

	 TERRA INTERNATIONAL (CANADA) INC.

	 TERRA MISSISSIPPI NITROGEN, INC. (F/K/A MISSISSIPPI NITROGEN, INC.)

	 MISSCHEM NITROGEN, L.L.C.

	 TERRA HOUSTON AMMONIA, INC. (F/K/A MISSISSIPPI CHEMICAL MANAGEMENT COMPANY)

	 MELAMINE CHEMICALS, INC.

		
	 By:
	 	 /s/ Mark A. Kalafut

	 Name:
	 	Mark A. Kalafut
	 Title:
	 	Vice President
	
	 TERRA NITROGEN (U.K.) LIMITED

		
	 By:
	 	 /s/ W. Mark Rosenbury

	 Name:
	 	W. Mark Rosenbury
	 Title:
	 	Director
	
	 TERRA (U.K.) HOLDINGS INC.

		
	 By:
	 	 /s/ Mark A. Kalafut

	 Name:
	 	Mark A. Kalafut
	 Title:
	 	Vice President

  

 [SIGNATURE PAGE TO AMENDMENT NO. 2 TO TERRA CAPITAL CREDIT AGREEMENT]

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