Exhibit 21.1



TERRA INDUSTRIES INC.

MAJORITY AND PARTIALLY OWNED SUBSIDIARIES

March 1, 2005



|                                             |  |                        |  |                        |  |                
|-------------------------------------------- |  | ---------------------- |  | ---------------------- |  | ---------------
|Name of Company                              |  | Percentage Held by TRA |  | Percentage Held by Sub |  | Jurisdiction   
|I. Inspiration Coal Inc.                     |  | 100                    |  |                        |  | Delaware       
|                                             |  |                        | 
|II. Inspiration Consolidated Copper Company  |  | 100                    |  |                        |  | Maine          
|which owns                                   |  |                        |  |                        |  |                
|A. Inspiration Development Company           |  |                        |  | 100                    |  | Delaware       
|                                             |  |                        | 
|III. Inspiration Gold Incorporated           |  | 100                    |  |                        |  | Delaware       
|                                             |  |                        | 
|IV. Terra Capital Holdings, Inc.             |  | 100                    |  |                        |  | Delaware       
|which owns                                   |  |                        |  |                        |  |                
|A. Terra Capital, Inc.                       |  |                        |  | 100                    |  | Delaware       
|which owns                                   |  |                        |  |                        |  |                
|1. Terra Methanol Corporation                |  |                        |  | 100                    |  | Delaware       
|2. Terra International, Inc.                 |  |                        |  | 100                    |  | Delaware       
|which owns                                   |  |                        |  |                        |  |                
|a. Terra International (Oklahoma) Inc.       |  |                        |  | 100                    |  | Delaware       
|b. Terra Real Estate Corporation             |  |                        |  | 100                    |  | Iowa           
|c. Terra Real Estate Development Corporation |  |                        |  | 100                    |  | Iowa           
|d. Terra Express, Inc.                       |  |                        |  | 100                    |  | Delaware       
|e. Terra International (Canada) Inc.         |  |                        |  | 100                    |  | Ontario, Canada
|which owns                                   |  |                        |  |                        |  |                
|1. Terra Nitrogen (U.K.) Limited             |  |                        |  | 100                    |  | England        
|f. Port Neal Corporation                     |  |                        |  | 100                    |  | Delaware       
|                                             |  |                        | 
|3. BMC Holdings, Inc.                        |  |                        |  | 100                    |  | Delaware       
|which owns                                   |  |                        |  |                        |  |                
|a. Beaumont Holdings Corporation             |  |                        |  | 100                    |  | Delaware       
|which owns                                   |  |                        |  |                        |  |                
|1. Terra (U.K.) Holdings Inc.1               |  |                        |  | 73                     |  | Delaware       
|which owns                                   |  |                        |  |                        |  |                
|a. Beaumont Ammonia Inc.                     |  |                        |  | 100                    |  | Delaware       

---

|1 | Terra Methanol Corporation owns 27% of Terra (U.K.) Holdings, Inc.
|- | ------------------------------------------------------------------



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TERRA INDUSTRIES INC.

MAJORITY AND PARTIALLY OWNED SUBSIDIARIES

March 1, 2005



|                                        |  |                        |  |                        |  |                       
|--------------------------------------- |  | ---------------------- |  | ---------------------- |  | ----------------------
|Name of Company                         |  | Percentage Held by TRA |  | Percentage Held by Sub |  | Jurisdiction          
|4. Terra Nitrogen Corporation           |  |                        |  | 100                    |  | Delaware              
|which owns                              |  |                        |  |                        |  |                       
|a. Terra Nitrogen Company, L.P.2        |  |                        |  | 75                     |  | Delaware              
|which owns                              |  |                        |  |                        |  |                       
|1. Terra Nitrogen, Limited Partnership3 |  |                        |  | 100                    |  | Delaware              
|a. Oklahoma Co2Partnership              |  |                        |  | 50                     |  | Oklahoma              
|                                        |  |                        | 
|5. Terra Mississippi Holdings Corp.     |  |                        |  | 100                    |  | Mississippi           
|which owns                              |  |                        |  |                        |  |                       
|a. Terra Mississippi Nitrogen, Inc.     |  |                        |  | 100                    |  | Delaware              
|b. Terra Houston Ammonia, Inc.          |  |                        |  | 100                    |  | Delaware              
|which owns                              |  |                        |  |                        |  |                       
|1. Houston Ammonia Terminal4            |  |                        |  | 50                     |  | Delaware              
|c. Koch Terra LLC5                      |  |                        |  | 50                     |  | Delaware              
|d. Terra V.I. Holdings Inc.             |  |                        |  | 100                    |  | British Virgin Islands
|which owns                              |  |                        |  |                        |  |                       
|1. Terra (Barbados) SRL                 |  |                        |  | 100                    |  | Barbados              
|which owns                              |  |                        |  |                        |  |                       
|a. Terra Trinidad Limited               |  |                        |  | 100                    |  | Trinidad              
|which owns                              |  |                        |  |                        |  |                       
|1. Point Lisas Nitrogen, Ltd.6          |  |                        |  | 50                     |  | Trinidad and Tobago   

---

|2 | Terra Nitrogen Corporations interest includes 1.0101% as General Partner and some of TNCLP is owned directly by Terra Capital, Inc.
|- | ------------------------------------------------------------------------------------------------------------------------------------

|3 | Terra Nitrogen Corporation is 1% General Partner
|- | ------------------------------------------------

|4 | Terra Mississippi Nitrogen, Inc. owns 49.5% and PCS owns .05% of Houston Ammonia Terminal
|- | -----------------------------------------------------------------------------------------

|5 | Koch Nitrogen Company owns the other 50% of Koch Terra LLC
|- | ----------------------------------------------------------

|6 | KNC Trinidad Limited owns the other 50% of Point Lisas Nitrogen, Ltd.
|- | ---------------------------------------------------------------------