##### 



TERRA INDUSTRIES INC.
MAJORITY AND PARTIALLY OWNED SUBSIDIARIES
March 12, 2007
 Exhibit 21.1
 Percentage
    
    
    PercentageName of Company
    
    Held by TRA
    
    
    Held by Sub
    
    
    JurisdictionI. Inspiration Coal Inc.
    
    
    100
    
    
    
    
    
    
    DelawareII. Inspiration Consolidated Copper Company
    
    
    100
    
    
    
    
    
    
    Mainewhich ownsA. Inspiration Development Company
    
    
    
    
    
    
    100
    
    
    DelawareIII. Inspiration Gold Incorporated
    
    
    100
    
    
    
    
    
    
    DelawareIV. Terra Capital Holdings, Inc.
    
    
    100
    
    

    
    
    
    
    Delawarewhich ownsA. Terra Capital, Inc.
    
    
    
    
    
    
    100
    
    
    Delawarewhich owns1. Terra Methanol Corporation
    
    
    
    
    
    
    100
    
    
    Delaware2. Terra International, Inc.
    
    
    
    
    
    
    100
    
    
    Delawarewhich ownsa. Terra International (Oklahoma) Inc.
    
    
    
    
    
    
    100
    
    
    Delawareb. Terra Real Estate Corporation
    
    
    
    
    
    
    100
    
    
    Iowac. Terra Real Estate Development Corporation
    
    
    
    
    
    
    100
    
    
    Iowad. Terra Express, Inc.
    
    
    
    
    
    
    100
    
    
    Delawaree. Terra International (Canada) Inc.
    
    
    
    
    
    
    100
    
    
    Ontario, Canadawhich owns1. Terra Nitrogen (U.K.) Limited
    
    
    
    
    
    
    100
    
    
    Englandf. Port Neal Corporation
    
    
    
    
    
    
    100
    
    
    Delaware3. BMC Holdings, Inc.
    
    
    
    
    
    
    100
    
    
    Delawarewhich ownsa. Beaumont Holdings Corporation
    
    
    
    
    
    
    100
    
    
    Delawarewhich owns1. Terra (U.K.) Holdings Inc.1
    
    
    
    
    
    
    73
    
    
    Delawarewhich ownsa. 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 12, 2007
 Exhibit 21.1
 Percentage
    
    
    PercentageName of Company
    
    Held by TRA
    
    
    Held by Sub
    
    
    Jurisdiction4. Terra Nitrogen Corporation (TNC)
    
    
    
    
    
    
    100
    
    
    Delawarewhich ownsa. Terra Nitrogen Company, L.P. (TNCLP)2
    
    
    
    
    
    
    75.3
    
    
    Delawarewhich owns1. Terra Nitrogen, Limited Partnership (TNLP)3
    
    
    
    
    
    
    99
    
    
    Delawarea. Oklahoma Co2 Partnership
    
    
    
    
    
    
    50
    
    
    Oklahoma5. Terra Nitrogen GP Holdings Inc. (TNGPHI)
    
    
    
    
    
    
    100
    
    
    Delawarewhich ownsa. Terra Nitrogen GP Inc. (TNGPI)
    
    
    
    
    
    
    100
    
    
    Delaware6. Terra Mississippi Holdings Corp.
    
    
    
    
    
    
    100
    
    
    Mississippiwhich ownsa. Terra Mississippi Nitrogen, Inc.
    
    
    
    
    
    
    100
    
    
    Delawarewhich owns1. Houston Ammonia Terminal, L.P.4
    
    
    
    
    
    
    49.5
    
    
    Delawareb. Terra Houston Ammonia, Inc.
    
    
    
    
    
    
    100
    
    
    Delawarec. Koch Terra LLC5
    
    
    
    
    
    
    50
    
    
    Delawared. Terra V.I. Holdings Inc.
    
    
    
    
    
    
    100
    
    
    British Virgin Islandswhich owns1. Terra (Barbados) SRL
    
    
    
    
    
    
    100
    
    
    Barbadoswhich ownsa. Terra Trinidad Limited
    
    
    
    
    
    
    100
    
    
    Trinidad and Tobagowhich owns1. Point Lisas Nitrogen, Ltd.6
    
    
    
    
    
    
    50
    
    
    Trinidad and Tobago
 
 2
    
    TNC owns 60.761% LP interest directly; its parent,
Terra Capital, Inc., owns 14.535% LP interest; and TNGPI owns 0.025% GP
interest and is the General Partner.3
    
    TNC owns 0.975% LP interest and TNGPI owns 0.025% GP
interest of TNLP.4
    
    Terra Mississippi Nitrogen, Inc. owns 49.5% LP
interest; Terra Houston Ammonia Inc. owns .5% GP interest and PCS owns the
remaining 50%.5
    
    Koch Nitrogen Company owns the other 50% of Koch Terra
LLC6
    
    KNC Trinidad Limited owns the other 50% of Point Lisas
Nitrogen, Ltd.