<PAGE>

================================================================================

                                    FORM 10-Q
                                  UNITED STATES
                       SECURITIES AND EXCHANGE COMMISSION
                             Washington, D.C. 20549

                        ________________________________


[X]      QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES
         EXCHANGE ACT OF 1934

         For the quarter ended June 30, 2002

                                       OR

[_]      TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES
         EXCHANGE ACT OF 1934

         For the transition period from _____ to _____

         Commission file number 1-10877

                          TERRA NITROGEN COMPANY, L.P.
             (Exact name of registrant as specified in its charter)

                   Delaware                             73-1389684
       State or other jurisdiction of       (I.R.S. Employer Identification No.)
       incorporation or organization)


                 Terra Centre
       PO Box 6000, 600 Fourth Street
               Sioux City, Iowa                         51102-6000
  (Address of principal executive office)               (Zip Code)


                         Registrant's telephone number:
                                 (712) 277-1340

         At the close of business on July 31, 2002, there were 18,501,576 Common
         Units outstanding.

         Indicate by check mark whether the registrant (1) has filed all reports
required to be filed by Section 13 or 15(d) of the Securities Exchange Act of
1934 during the preceding 12 months (or for such shorter period that the
registrant was required to file such reports), and (2) has been subject to such
filing requirements for the past 90 days.
 X  Yes   ___ No
---

================================================================================

<PAGE>

                          PART I. FINANCIAL INFORMATION

                          TERRA NITROGEN COMPANY, L.P.
                           CONSOLIDATED BALANCE SHEETS
                                 (in thousands)
                                   (unaudited)
<TABLE>
<CAPTION>
                                                               June 30,             December 31,          June 30,
                                                                 2002                  2001                  2001
                                                             --------------        -------------       -------------
<S>                                                          <C>                   <C>                 <C>
ASSETS
     Current assets:
         Cash and cash equivalents                             $     11,125          $         10        $         10
         Accounts receivable                                         28,781                32,311              26,166
         Inventory - finished products                               12,137                18,292              39,119
         Inventory - materials and supplies                           9,754                10,128               9,569
         Prepaid expenses and other current assets                    2,744                 3,939               2,364
---------------------------------------------------------------------------------------------------------------------
     Total current assets                                            64,541                64,680              77,228
---------------------------------------------------------------------------------------------------------------------

     Net property, plant and equipment                              130,849               136,335             142,202
     Other assets                                                     7,593                 9,402               7,857
---------------------------------------------------------------------------------------------------------------------
Total assets                                                   $    202,983          $    210,417        $    227,287
=====================================================================================================================

LIABILITIES AND PARTNERS' CAPITAL
     Current liabilities:
         Short-term note payable to affiliates                 $        ---          $     14,293        $     19,800
         Accounts payable and accrued liabilities                    14,131                12,720              18,968
         Customer prepayments                                           741                 2,388                 ---
         Current portion of long-term debt and
            capital lease obligations                                    53                   ---               1,000
---------------------------------------------------------------------------------------------------------------------
     Total current liabilities                                       14,925                29,401              39,768
---------------------------------------------------------------------------------------------------------------------

     Long-term debt                                                   8,362                 8,200               7,231
     Long-term payable to affiliates                                  5,316                 5,316               5,316
     Partners' capital                                              174,380               167,500             174,972
---------------------------------------------------------------------------------------------------------------------
Total liabilities and partners' capital                        $    202,983          $    210,417        $    227,287
=====================================================================================================================
</TABLE>

See Accompanying Notes to the Consolidated Financial Statements.

                                                                               2

<PAGE>

                          TERRA NITROGEN COMPANY, L.P.
                      CONSOLIDATED STATEMENTS OF OPERATIONS
                     (in thousands, except per unit amounts)
                                   (unaudited)
<TABLE>
<CAPTION>
                                                             Three Months Ended                  Six Months Ended
                                                                  June 30,                           June 30,
                                                            2002           2001                2002           2001
                                                       --------------  -------------      --------------  -------------
<S>                                                  <C>               <C>               <C>              <C>
Revenues                                             $     104,529     $     101,558      $     161,638     $   167,099
Other income                                                   364               193                655             283
-----------------------------------------------------------------------------------------------------------------------
Total revenues                                             104,893           101,751            162,293         167,382
Cost of goods sold                                          99,198            99,880            152,264         161,755
-----------------------------------------------------------------------------------------------------------------------

Gross profit                                                 5,695             1,871             10,029           5,627
Operating expenses                                           2,649             2,643              4,644           4,741
-----------------------------------------------------------------------------------------------------------------------

Operating income (loss)                                      3,046              (772)             5,385             886

Interest expense                                               (22)             (190)              (125)           (412)
Interest income                                                  1                41                  1             203
-----------------------------------------------------------------------------------------------------------------------

Net income (loss)                                    $       3,025     $        (921)     $       5,261     $       677
=======================================================================================================================
Net income (loss) allocable to
   limited partners' interest                        $       2,965     $        (904)     $       5,156     $       662
=======================================================================================================================

Net income (loss) per limited
   partnership unit                                  $        0.16     $       (0.05)     $        0.28     $      0.04
=======================================================================================================================
</TABLE>

See Accompanying Notes to the Consolidated Financial Statements.

                                                                               3

<PAGE>

                          TERRA NITROGEN COMPANY, L.P.
                      CONSOLIDATED STATEMENTS OF CASH FLOWS
                                 (in thousands)
                                   (unaudited)

<TABLE>
<CAPTION>
                                                                                                Six Months Ended
                                                                                                     June 30,
                                                                                           2002                  2001
                                                                                      -------------         -------------
<S>                                                                                   <C>                   <C>
Operating activities:

Net income from operations                                                            $     5,261           $       677
Adjustments to reconcile net income to net cash
 flows from operating activities:
     Depreciation and amortization                                                          6,547                 6,372
     Changes in operating assets and liabilities:
     Receivables                                                                            3,530                (1,427)
     Inventories                                                                            6,528               (29,307)
     Prepaid expenses                                                                       2,814                (1,952)
     Accounts payable, accrued liabilities and
     customer prepayments                                                                    (235)               (5,194)
     Change in other assets                                                                 1,811                 3,401
-------------------------------------------------------------------------------------------------------------------------
Net cash flows from operating activities                                                   26,256               (27,430)

Net cash flows from investing activities:

     Capital expenditures                                                                  (1,062)                 (976)

Financing activities:

     Net changes in short-term borrowings                                                 (14,293)               19,800
     Issuance (repayment) of long-term debt
      and capital lease obligations                                                           214                (1,019)
     Partnership distributions paid                                                           ---                (8,306)
-------------------------------------------------------------------------------------------------------------------------
Net cash flows from financing activities                                                  (14,079)               10,475
-------------------------------------------------------------------------------------------------------------------------

Net increase (decrease) in cash and cash equivalents                                       11,115               (17,931)
Cash and cash equivalents at beginning of period                                               10                17,941
-------------------------------------------------------------------------------------------------------------------------
Cash and cash equivalents at end of period                                            $    11,125           $        10
=========================================================================================================================
</TABLE>

See Accompanying Notes to the Consolidated Financial Statements.

                                                                               4

<PAGE>

                          TERRA NITROGEN COMPANY, L.P.
                  CONSOLIDATED STATEMENTS OF PARTNER'S CAPITAL


<TABLE>
<CAPTION>
                                                            Limited        General      Accumulated        Total
                                                            Partners'      Partner      Other              Partners'
                                                            Interests      Interests    Comprehensive      Capital
(in thousands, except for Units)                                                        Income
--------------------------------------------------------------------------------------------------------------------
<S>                                                          <C>           <C>          <C>               <C>
Partners' capital at January 1, 2002                          $178,808     $ (10,221)   $    (1,087)      $  167,500
Net Income                                                       5,156           105            ---            5,261
Change in fair value of derivatives                                ---           ---          1,619            1,619
                                                                                                          ----------
Comprehensive income                                               ---           ---            ---            6,880
--------------------------------------------------------------------------------------------------------------------

Partners' capital at June 30, 2002                            $183,964     $ (10,116)   $       532      $   174,380
====================================================================================================================

Limited partner units issued and
   Outstanding at June 30, 2002                                           18,501,576
                                                                          ==========


<CAPTION>
                                                             Limited        General      Accumulated        Total
                                                             Partners'      Partners'    Other              Partners'
                                                             Interests      Interest     Comprehensive      Capital
(in thousands, except for Units)                                                         Income
--------------------------------------------------------------------------------------------------------------------
<S>                                                        <C>             <C>          <C>             <C>
Partners' capital at January 1, 2001                       $   196,571     $  (9,859)   $       ---      $   186,712
Net Income                                                         663            14            ---              677
Cumulative effect of change in
  accounting principle for
  derivative financial instruments                                 ---           ---         14,200           14,200
Change in fair value of derivatives                                ---           ---        (18,311)         (18,311)
                                                                                                         ------------
Comprehensive income                                               ---           ---            ---           (3,434)
Distributions                                                   (8,140)         (166)           ---           (8,306)
---------------------------------------------------------------------------------------------------------------------

Partners' capital at June 30, 2001                         $   189,094     $ (10,011)   $    (4,111)     $   174,972
====================================================================================================================

Limited partner units issued and
   Outstanding at June 30, 2001                                            18,501,576
                                                                           ==========
</TABLE>

See Accompanying Notes to the Consolidated Financial Statements.

                                                                               5

<PAGE>

                          TERRA NITROGEN COMPANY, L.P.

             Notes to Consolidated Financial Statements (Unaudited)

1.    Basis of Presentation

      The consolidated financial statements contained herein should be read in
      conjunction with the consolidated financial statements and notes thereto
      contained in the Terra Nitrogen Company, L.P. ("TNCLP") Annual Report on
      Form 10-K for the year ended December 31, 2001. TNCLP and its operating
      partnership subsidiary, Terra Nitrogen, Limited Partnership (the
      "Operating Partnership"), are referred to herein, collectively, as the
      "Partnership".

      The accompanying unaudited consolidated financial statements reflect all
      adjustments, which are, in the opinion of management, necessary for the
      fair statement of the results for the periods presented. All of these
      adjustments are of a normal and recurring nature. Results for the quarter
      are not necessarily indicative of future financial results of the
      Partnership.

      Realized gains and losses from hedging activities and premiums paid for
      option contracts are deferred and recognized in the month in which the
      hedged transactions closed. Swaps, options and other derivative
      instruments that do not qualify for hedge accounting treatment are marked
      to market each accounting period. Costs associated with settlement of
      natural gas purchase contracts and costs for shipping and handling are
      included in cost of sales.

      Net income per limited partnership unit is computed by dividing net
      income, less a 2% share allocable to the General Partner for the six
      months ended June 30, 2002 and 2001, respectively, by 18,501,576 limited
      partner units. According to the Agreement of Limited Partnership of TNCLP,
      net income is allocated to the General Partner and the Limited Partners in
      each taxable year in the same proportion as Available Cash for such
      taxable year was distributed to the General Partner and the Limited
      Partners. If there is no cash distribution, net income is allocated to the
      Limited Partners and the General Partner generally based on their
      respective ownership percentages. Distributions of Available Cash are made
      98% to the Limited Partners and 2% to the General Partner, except that the
      General Partner is entitled, as an incentive, to larger percentage
      interests (up to 50%) to the extent that distributions of Available Cash
      exceed specified amounts.

2.    Distributions to Unitholders

      The Partnership makes quarterly cash distributions to Unitholders and the
      General Partner in an amount equal to 100% of its Available Cash. No
      distributions were made during the first half of 2002. On July 22, 2002
      the Partnership declared a $3.8 million cash distribution ($0.20 per
      common unit) payable August 26, 2002 to record holders as of August 5,
      2002. The Partnership paid cash distributions totaling $8.3 million ($0.44
      per common unit) in the first half of 2001.

                                                                               6

<PAGE>

3.    Financing Arrangements

      The Partnership has an arrangement for demand deposits and notes with an
      affiliate to allow for excess Partnership cash to be deposited with or
      funds to be borrowed from Terra Capital, Inc., the parent of the General
      Partner. At June 30, 2002, $11.1 million was deposited with Terra Capital,
      Inc. The amount of the demand note was $19.8 million at June 30, 2001 and
      bore interest at the rate paid by Terra Capital on its short-term
      borrowings.

4.    Natural gas costs

      Natural gas is the principal raw material used in the Partnership's
      production of nitrogen products. Natural gas prices are volatile and we
      manage this volatility through the use of derivative commodity
      instruments. The Partnership's normal policy is to hedge 20-80% of its
      natural gas requirements for the upcoming 12 months and up to 50% of the
      requirements for the following 24-month period, provided that such
      arrangements would not result in costs greater than expected selling
      prices for our finished products. The financial derivatives are traded in
      months forward and settlement dates are scheduled to coincide with gas
      purchases during those future periods. These contracts reference physical
      natural gas prices or approximate NYMEX futures contract prices. Contract
      prices are frequently based on prices at the most common and financially
      liquid location of reference for financial derivatives related to natural
      gas. However, natural gas supplies for our facilities are purchased for
      each plant at locations other than reference points, which often creates a
      location basis differential between the contract price and the physical
      price of natural gas. Accordingly, use of financial derivatives may not
      exactly offset the change in the price of physical gas.

      The Partnership has entered into forward pricing positions for a portion
      of its natural gas requirements for the remainder of 2002 and part of
      2003, consistent with its policy. As a result of its policies, the
      Partnership has reduced the potential adverse financial impact of natural
      gas increases during the forward pricing period, but conversely, if
      natural gas prices were to fall, the Partnership will incur higher costs.
      Contracts were in place at June 30, 2002 to cover 12% of natural gas
      requirements for the succeeding twelve months. The Partnership also uses
      basis swaps to manage some of the basis risk.

      Unrealized gains from forward pricing positions totaled $0.2 million as of
      June 30, 2002. In addition, the Partnership had contracts which would
      reduce, assuming no decrease in forward natural gas prices at June 30,
      2002, the purchase price of about 7 percent of its next 12 months' natural
      gas needs by $1.4 million. The amount ultimately recognized by the
      Partnership will be dependent on published prices in effect at the time of
      settlement. The Partnership also had $0.3 million of realized gains on
      closed North America contracts relating to future periods that have been
      deferred to the respective period.

      On June 30, 2002, the fair value of the derivatives resulted in a $0.2
      million increase to current assets and a $0.3 million reduction to current
      liabilities. The increase to current assets was to recognize he value of
      open natural gas contracts; the reduction to current liabilities was to
      reclassify deferred gains on closed contracts relating to future periods.

                                                                               7

<PAGE>

5.    Idled facilities

      On November 30, 2000, the Partnership reported that it would not restart
      its Blytheville, Arkansas ammonia and urea production facility as the
      result of high natural gas costs. On January 2, 2001 the Partnership idled
      one of two sets of ammonia and upgrading plants at its Verdigris, Oklahoma
      facility as the result of high natural gas costs. The Verdigris plant
      resumed production on January 23, 2001 and the Blytheville plant resumed
      production in March 2001. The Blytheville plant was also idled from June
      2001 until October 2001 due to its inability to generate cash flow under
      existing price and cost conditions.

6.   In July 2001, the Financial Accounting Standards Board ("FASB") issued
     Statement of Financial Accounting Standards ("SFAS") No. 143, "Accounting
     for Asset Retirement Obligations". This standard requires us to record the
     fair value of a liability for an asset retirement obligation in the period
     in which it is incurred and is effective for our fiscal year 2003. The
     adoption of this standard is not expected to have a material effect on the
     Partnerships' financial position or results of operations.

                                                                               8

<PAGE>

         Management's Discussion and Analysis of Financial Condition and
                              Results of Operations

                              RESULTS OF OPERATIONS

Critical Accounting Policies

The discussion and analysis of our financial condition and results of operations
are based upon our consolidated financial statements, which have been prepared
in accordance with accounting principles generally accepted in the United States
of America for interim reporting purposes. The preparation of these financial
statements requires us to make estimates and judgments that affect the amount of
assets, liabilities, revenues and expenses at the date of our financial
statements. Actual results may differ from these estimates under different
assumptions or conditions.

Critical accounting policies are defined as those that are reflective of
significant judgments and uncertainties, and potentially result in materially
different results under different assumptions and conditions. Our critical
accounting policies are described below.

Impairments of long-lived assets - We record impairment losses on long-lived
assets used in operations when events and circumstances indicate that the assets
might be impaired and the undiscounted cash flows estimated to be generated by
those assets are less than the carrying amount of these items. Our cash flow
estimates are based on historical results adjusted to reflect our best estimate
of future market and operating conditions. The net carrying value of assets not
recoverable is reduced to fair value. Our estimates of fair value represent our
best estimate based on industry trends and reference to market rates and
transactions.

Revenue recognition - Revenue is recognized when title to finished product
passes to the customer. Revenue is recognized as the net amount to be received
after deducting estimated amounts for discounts and trade allowances. Revenue
includes amounts paid by customers for shipping and handling.

Inventory valuation - Inventories are stated at the lower of cost or estimated
net realizable value. The average cost of inventories is determined using the
first-in, first-out method. The nitrogen and methanol industries are
characterized by rapid change in both demand and pricing. Rapid declines in
demand could result in temporary or permanent curtailment of production, while
rapid declines in price could result in a lower of cost or market adjustment.

                                                                               9

<PAGE>

                 Three months ended June 30, 2002 compared with
                        three months ended June 30, 2001

Volumes and prices for the three-month periods ended June 30, 2002 and 2001
follow:

                                2002                           2001
                        Volumes     Unit Price       Volumes         Unit Price
                       (000 tons)    ($/ton)        (000 tons)         ($/ton)
                      ------------ ------------    ------------     ------------
Ammonia                   129        $  159             91             $  276
UAN                       825            71            458                117
Urea                      122           114            107                144

Revenues for the quarter ended June 30, 2002 increased $2.9 million, or 3%,
compared with the same quarter in 2001 as the result of higher volumes for all
Partnership products, partly offset by lower sales prices. Selling prices
reduced revenues by $57 million reflecting increased supplies of nitrogen
products as compared to 2001 when high natural gas costs resulted in industry
wide production curtailments from the middle of 2000. Second quarter 2001 sales
volumes were depressed due to lower production rates, reduced demand in response
to high prices and increased competition from imports.

Second quarter gross profits increased $3.8 million from 2001. Higher 2002 sales
volumes contributed $4 million to gross profits. The effect of lower 2002 sales
prices was offset by lower natural gas costs, which declined from $5.25 MMBtu in
2001 to $3.11/MMBtu in 2002 (net of forward pricing gains or losses.) As a
result of forward price contracts, second quarter 2002 natural gas costs for the
Partnership were $4.1 million lower than spot prices.

Operating expenses were essentially unchanged in 2002 from 2001. Net interest
expense was $128,000 lower than the 2001 second quarter due to lower borrowing
levels.

                                                                              10

<PAGE>

                  Six months ended June 30, 2002 compared with
                         six months ended June 30, 2001

Volumes and prices for the six-month periods ended June 30, 2002 and 2001
follow:

                                2002                           2001
                        Volumes     Unit Price       Volumes         Unit Price
                       (000 tons)    ($/ton)        (000 tons)         ($/ton)
                      ------------ ------------    ------------     ------------
Ammonia                    204        $  150            109            $  282
UAN                      1,245            68            812               123
Urea                       242           109            143               160

Revenues for the six months ended June 30, 2002 declined $5.5 million, or 3%,
compared with the same period in 2001. Sales prices were lower as the result of
increased supplies of nitrogen fertilizer in contrast to 2001 when high natural
gas costs resulted in industry-wide production curtailments. A substantial
portion of the revenue shortfall from lower sales prices was offset by higher
2002 volumes as compared to last year's first half. Sales volumes in 2001 were
depressed due to lower production rates, reduced demand in response to high
prices and increased competition from imports.

Gross profits during the 2002 first six months increased $4.4 million from 2001.
The increase in gross profits was primarily related to lower natural gas costs
and higher sales volumes, offset in part by reduced sales prices. Natural gas
costs decreased almost $84 million over the 2001 first half as unit costs, net
of forward pricing gains and losses decreased to $2.86/MMBtu during the 2002
first half compared to $5.81/MMBtu during the same 2001 period. Natural gas
costs in the 2002 first half were $1.4 million lower than spot prices as the
result of forward price contracts.

Operating expenses were essentially unchanged in 2002 from 2001. Net interest
expense of $124,000 was $85,000 less than the 2001 first half due to lower
borrowing levels.

Capital resources and liquidity

Net cash generated from operating activities for the first half of 2002 was
$26.3 million composed of $11.8 million of cash provided from operating
activities and $14.5 million of decreases to working capital balances. The
decrease in working capital consisted of a seasonal decrease in inventory,
accounts receivable and prepaid expenses.

Capital expenditures of $1.1 million during the first half of 2002 were
primarily to fund replacement and stay-in-business additions to plant and
equipment. The Partnership expects 2002 capital expenditures to approximate $6.0
million to fund replacement and stay-in-business additions to plant and
equipment.

On July 22, 2002, the Partnership declared a $3.8 million distribution ($0.20
per common unit) payable August 26 to record holders as of August 5, 2002.

The Partnership, along with Terra Industries Inc. ("Terra"), Terra Capital, Inc.
and other affiliates, has an asset-based financing agreement that expires in
June 2005. The financing agreement provides for the

                                                                              11

<PAGE>

Partnership to borrow amounts generally up to 85% of eligible receivables plus
60% of eligible inventory. At June 30, 2002, the Partnership had unused
borrowing availability of approximately $29 million. The financing agreement,
which expires June 2005, bears interest at floating rates and is secured by
substantially all of the Partnerships' working capital. The agreement also
requires the Partnership and its affiliates to adhere to certain limitations on
additional debt, capital expenditures, acquisitions, liens, asset sales,
investments, prepayments of subordinated indebtedness, changes in lines of
business and transactions with affiliates. In June, 2002 the credit facility was
amended to remove the required minimum level of earnings before interest, income
taxes, depreciation, amortization and other non-cash items ("EBITDA") as long as
borrowing availability is $60 million or more. If Terra's borrowing availability
falls below $60 million after December 31, 2002, Terra will be required to have
achieved minimum EBITDA of $60 million during the most recent four quarters.
Prior to December 31, 2002, a reduced EBITDA requirement is in effect, which is
$45 million for the four quarters ending June 30, 2002 and $50 million for the
four quarters ending September 30, 2002. If necessary, the Partnership believes
that it could replace its existing credit lines on terms and conditions not
materially different than its current arrangement through Terra.

The Partnership's principal needs for funds are for support of its working
capital and capital expenditures. The Partnership intends to fund its needs
primarily from net cash provided by operating activities, and, to the extent
required, from funds borrowed from others, including borrowings from Terra
Capital, Inc., the parent of the General Partner. The Partnership believes that
such sources of funds will be adequate to meet the Partnership's working capital
needs and fund the Partnership's capital expenditures for at least the next 12
months.

Limited Call Right

At December 31, 2001, the General Partner and its affiliates owned 75.1% of the
Partnership's outstanding units. When less than 25% of the issued and
outstanding units are held by non-affiliates of the General Partner, the
Partnership, at the General Partner's sole discretion, may call, or assign to
the General Partner or its affiliates, its right to acquire all such outstanding
units held by non-affiliated persons. If the General Partner elects to acquire
all outstanding units, the Partnership is required to give at least 30 but not
more than 60 days' notice of its decision to purchase the outstanding units. The
purchase price per unit will be the greater of 1) the average of the previous 20
trading days' closing prices as of the date five days before the purchase is
announced and 2) the highest price paid by the General Partner of any of its
affiliates for any unit within the 90 days preceding the date the purchase is
announced.

FORWARD LOOKING PRECAUTIONS

Information contained in this report, other than historical information, may be
considered forward looking. Forward looking information reflects Management's
current views of future events and financial performance that involve a number
of risks and uncertainties. The factors that could cause actual results to
differ materially include, but are not limited to the following: Changes in the
financial markets, general economic conditions within the agricultural industry,
competitive factors and price changes (principally, sales prices of nitrogen
products and natural gas costs), changes in product mix, changes in the
seasonality of demand patterns, changes in weather conditions, changes in
agricultural regulations, and other risks detailed in the Partnership's
Securities and Exchange Commission filings, in particular the "Factors that
Affect Operating Results" section of its most recent Form 10-K.

                                                                              12

<PAGE>

                           Part II. Other Information

Item 6.  Exhibits and Reports on Form 8-K

         (a)  Exhibits:

                Exhibit 99.1    Certification pursuant to 18 U.S.C. Section 1350
                                As Adopted Pursuant to Section 906 of the
                                Sarbanes-Oxley Act of 2002


         (b)  Reports on Form 8-K:

                None

                                    SIGNATURE

         Pursuant to the requirements of the Securities Exchange Act of 1934,
the registrant has duly caused this report to be signed on its behalf by the
undersigned thereunto duly authorized.

                                                  TERRA NITROGEN COMPANY, L.P.

                                              By: TERRA NITROGEN CORPORATION
                                                  as General Partner

                                              By: /s/ Francis G. Meyer
                                                  ----------------------------
                                                  Francis G. Meyer
                                                  Vice President
                                                  (Principal Accounting Officer)



Date:  August 9, 2002

                                                                              13