Exhibit 23.1

CONSENT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM

We consent to the incorporation by reference in Registration Statement No. 33-46734 of Terra Industries Inc. on Form S-8 of our report dated June 28, 2006 appearing in this Annual Report on Form 11-K of the Terra Industries Inc. Employees’ Savings and Investment Plan for the year ended December 31, 2005.

DELOITTE & TOUCHE LLP

Omaha, Nebraska
June 28, 2006