TERRA INDUSTRIES INC

Q: Mar 31 2010

FY: Dec 31 2009

FY: Dec 31 2009

Q: Sep 30 2009

Q: Jun 30 2009

FY: Dec 31 2008

Q: Mar 31 2009

FY: Dec 31 2008

Q: Sep 30 2008

Q: Jun 30 2008

Q: Mar 31 2008

FY: Dec 31 2007

Q: Sep 30 2007

Q: Jun 30 2007

Q: Mar 31 2007

FY: Dec 31 2006

Q: Sep 30 2006

Q: Jun 30 2006

Q: Mar 31 2006

FY: Dec 31 2005

2.02

1.02,2.01,2.04,3.01,5.02,5.03,9.01

2.02

1.02,5.01,5.02

8.01,9.01

Unregistered Sales of Equity Securities

Entry into a Material Definitive Agreement

Other Events

Other Events

Other Events

1.01,9.01

Results of Operations and Financial Condition

Entry into a Material Definitive Agreement

5.02

8.01,9.01

1.01,9.01

8.01,9.01

1.01

8.01,9.01

8.01,9.01

No description available

Certification of termination of registration of a class of securities (Section 12(b))

Post Effective Amendment to S-8

Post Effective Amendment to S-8

Post Effective Amendment to S-8

Prospectus Supplement for Primary Offering

Free Writing Prospectus

Notification of removal from listing and/or registration on a national securities exchange

Prospectus Supplement for Primary Offering

Automatic Shelf Registration

Written communication about a business combination transaction (Rule 425)

Written communication about a business combination transaction (Rule 425)

Written communication about a business combination transaction (Rule 425)

Written communication about a business combination transaction (Rule 425)

Written communication about a business combination transaction (Rule 425)

Written communication about a business combination transaction (Rule 425)

Written communication about a business combination transaction (Rule 425)

Written communication about a business combination transaction (Rule 425)

Written communication about a business combination transaction (Rule 425)

Written communication about a business combination transaction (Rule 425)

No description available

Additional Information for Proxy Statement/ Votes

Additional Information for Proxy Statement/ Votes

Additional Information for Proxy Statement/ Votes

Additional Information for Proxy Statement/ Votes

Additional Information for Proxy Statement/ Votes

Additional Information for Proxy Statement/ Votes

Additional Information for Proxy Statement/ Votes

Additional Information for Proxy Statement/ Votes

Additional Information for Proxy Statement/ Votes

Additional Information for Proxy Statement/ Votes

Additional Information for Proxy Statement/ Votes

Additional Information for Proxy Statement/ Votes

Additional Information for Proxy Statement/ Votes

Additional Information for Proxy Statement/ Votes

Additional Information for Proxy Statement/ Votes

Additional Information for Proxy Statement/ Votes

Additional Information for Proxy Statement/ Votes

Additional Information for Proxy Statement/ Votes

Additional Information for Proxy Statement/ Votes

MASON CAPITAL MANAGEMENT LLC

CF Industries Holdings, Inc.

TERRA INDUSTRIES INC

Frost Bert A

Nocchiero Anthony J

Will W Anthony

White Lynn F

Wilson Stephen R

Barnard Douglas C

Jablow Spertus Wendy S

Koch Philipp P

Hoker Richard A

CF Industries Holdings, Inc.

TERRA INDUSTRIES INC

FRASER DOD A

Smith Earl B.

GIESLER JOSEPH D

Dillon Edward J

Lilly John N.

Janson Peter S

Post-effective amendment to an automatic shelf registration statement

Annual reports of employee stock purchase savings and similar plans pursuant to Section 15(d)

Correspondence with the SEC

Correspondence with the SEC

Letter from the SEC

Letter from the SEC

Correspondence with the SEC

Annual reports of employee stock purchase savings and similar plans pursuant to Section 15(d) (amendment)

Annual reports of employee stock purchase savings and similar plans pursuant to Section 15(d)

Letter from the SEC

Letter from the SEC

Correspondence with the SEC

Correspondence with the SEC

Correspondence with the SEC

Letter from the SEC

Correspondence with the SEC

Correspondence with the SEC

Letter from the SEC

Annual reports of employee stock purchase savings and similar plans pursuant to Section 15(d)

Correspondence with the SEC