2010 Annual Report 1a.Objectives (from AD-416) Provide BLM with a decision matrix to be utilized in selecting treatment protocol to increase native diversity in three-awn dominated plant communities. 1b.Approach (from AD-416) Examine the effects of fire and nitrogen addition on three-awn dominated communities. Increased nitrogen availability will likely improve the ability of other species to establish and compete with three-awn. Late growing season fire should be detrimental to red three-awn because of the plant's growth pattern and bunchgrass habit. Treatments will be combinations of fire vs. no fire and nitrogen addition vs. no nitrogen addition and assigned in a completely randomized design with factorial arrangement and replicated 5 times. Treatment effects will be evaluated by measuring standing crop, plant species composition and plant diversity before treatment and 2 years post-treatment. 3.Progress Report Study sites have been identified and fenced. BLM delayed treatment application for late FY2009 and early FY2010. Preliminary data have been collected and sites are ready for BLM treatment application late in FY 2010 and early FY 2011. This project supports NP 205 Component, Ecosystems and their Sustainable Management, while addressing Problem Area, Ecological and Economical Sustainability.