Exhibit 21



SUBSIDIARIES OF

POTASH CORPORATION
OF SASKATCHEWAN INC.



|                                             |  |                                         
|-------------------------------------------- |  | ----------------------------------------
|Name of Entity                               |  | Jurisdiction ofIncorporation orFormation
|101070338 Saskatchewan Ltd.                  |  | Saskatchewan                            
|8727856 Canada Inc.                          |  | Canada                                  
|175360 Canada Inc.                           |  | Canada                                  
|628550 Saskatchewan Ltd.                     |  | Saskatchewan                            
|4420 Investment LLC                          |  | Delaware                                
|AA Sulfuric Corporation                      |  | Louisiana                               
|Aboriginal Career Centre Inc.                |  | Canada                                  
|Canpotex Bulk Terminals Limited              |  | Canada                                  
|Chilkap Resources Ltd.                       |  | Yukon                                   
|Inversiones El Boldo Limitada                |  | Chile                                   
|Inversiones El Roble S.A.                    |  | Chile                                   
|Inversiones El Sauce S.A.                    |  | Chile                                   
|Inversiones PCS Chile Limitada               |  | Chile                                   
|Inversiones RAC Chile S.A.                   |  | Chile                                   
|Minera Saskatchewan Limitada                 |  | Chile                                   
|PCS Administration (USA), Inc.               |  | Delaware                                
|PCS (Barbados) Enterprise SRL                |  | Barbados                                
|PCS (Barbados) Holdings SRL                  |  | Barbados                                
|PCS (Barbados) Investment Company Ltd.       |  | Barbados                                
|PCS (Barbados) Shipping, Ltd.                |  | Barbados                                
|PCS Cassidy Lake Company                     |  | Ontario                                 
|PCS Cassidy Lake Limited                     |  | Canada                                  
|PCS Chile I LLC                              |  | Delaware                                
|PCS Chile II LLC                             |  | Delaware                                
|PCS Fosfatos do Brasil Ltda.                 |  | Brazil                                  
|PCS Hammond LLC                              |  | Delaware                                
|PCS Industrial Products Inc.                 |  | Delaware                                
|PCS Joint Venture, Ltd.                      |  | Florida                                 
|PCS Jordan LLC                               |  | Delaware                                
|PCS L.P. Inc.                                |  | Delaware                                
|PCS LP LLC 2                                 |  | Delaware                                
|PCS Nitrogen Ammonia Terminal Corporation I  |  | Texas                                   
|PCS Nitrogen Ammonia Terminal Corporation II |  | Delaware                                
|PCS Nitrogen Delaware LLC                    |  | Delaware                                
|PCS Nitrogen Fertilizer, L.P.                |  | Delaware                                
|PCS Nitrogen Fertilizer Operations, Inc.     |  | Delaware                                
|PCS Nitrogen, Inc.                           |  | Delaware                                
|PCS Nitrogen LCD Corporation                 |  | Delaware                                
|PCS Nitrogen Ohio, L.P.                      |  | Delaware                                
|PCS Nitrogen Trinidad Corporation            |  | Delaware                                
|PCS Nitrogen Trinidad Limited                |  | Trinidad                                
|PCS Phosphate Company, Inc.                  |  | Delaware                                
|PCS Purified Phosphates                      |  | Virginia                                
|PCS Sales (Canada) Inc.                      |  | Saskatchewan                            
|PCS Sales (Indiana), Inc.                    |  | Indiana                                 
|PCS Sales (Iowa), Inc.                       |  | Iowa                                    
|PCS Sales (USA), Inc.                        |  | Delaware                                



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|                                                     |  |             
|---------------------------------------------------- |  | ------------
|Pérola S.A.                                          |  | Brazil      
|Phosphate Holding Company, Inc.                      |  | Delaware    
|Potash Corporation of Saskatchewan (Florida) Inc.    |  | Florida     
|Potash Corporation of Saskatchewan Transport Limited |  | Saskatchewan
|PotashCorp Agricultural Cooperative Society Ltd.     |  | Israel      
|PotashCorp Finance (Barbados) Limited                |  | Barbados    
|PotashCorp (Luxembourg) Finance S.à r.l.             |  | Luxembourg  
|Potash Holding Company, Inc.                         |  | Delaware    
|RAC Investments Ltd.                                 |  | Cayman      
|White Springs Agricultural Chemicals, Inc.           |  | Delaware