50 A preliminary hazard model of white pine blister rust for the Sacramento Ranger District, Lincoln National Forest. U.S. Department of Agriculture, Forest Service, Rocky Mountain Research Station. Since about 1970, an outbreak of blister rust has been increasing in the Sacramento Mountains of southern New Mexico and threatens southwestern white pine. To help determine the expected extent and impact of blister rust, we propose a preliminary hazard model for the Sacramento Ranger District. We identify the sites at risk and rank them into three relative hazard classes based on elevation, plant association, and topographic position.
Studies are underway to test and refine the model.
51 A bibliography for the northern Madrean Biogeographic Province. U.S. Department of Agriculture, Forest Service, Rocky Mountain Research Station. An online bibliography was compiled to furnish a literature basis for implementation of land management activities and planning research endeavors in the Madrean Biogeographic Province, which includes the Madrean Archipelago region in the southwestern United States. Citations are listed alphabetically by author in categories appropriate to the subject matter presented. The large number of citations preclude hard-copy publication.