EL Dorado, Arkansas, USA, 25 March 2010 — Deltic Timber Corporation (NYSE-DEL) has scheduled a conference call at 2:00 p.m. Central Time on 20 April to review first quarter results, which will be announced 19 April. Arrangements for the call are being handled by Thomson Reuters Event Call.

Interested parties may participate in the call by dialing 1-866-713-8564 and referencing participant passcode identification number 50165760. The call also will be broadcast live over the Internet and can be accessed through the Investor Relations section of the Deltic Web site at www.deltic.com. All investors, analysts, media, and the general public are invited to participate.

Online replays of the call will be available through the Deltic Web site, and a recording of the call will be available until 27 April by dialing 1-888-286-8010 and referencing replay passcode identification number 60932107.