SPRINGFIELD, Ore. — Roseburg Resources Co. announced an agreement to sell its California timberlands to a timberland investment vehicle managed by New Forests, the company said Thursday morning. The transaction includes 170,000 acres in northern California, largely in Siskiyou and Shasta counties. Roseburg’s California timberlands are investment-grade with a long history of professional management. “The sale of our California timberlands would not be possible without the contributions of our California resource team,” said Scott Folk, Roseburg’s Senior Vice President of Resources. “Thanks to the team’s work, these lands will remain working forest timberlands under the new management of New Forests, a leading timberland investment organization focused on long-term growth.”