Mari-Vaughn V. Johnson,^* Julie A. Finzel,^* Deborah Spanel,^* Mark Weltz,^* Homer Sanchez,^* James R. Kiniry<sup>*


*</sup>Authors are Research Agronomists, USDA–ARS, Grassland, Soil, and Water Research Laboratory, Temple, TX 76502, USA (Johnson and Kiniry; jim.kiniry@ars.usda.gov); Research Assistant, USDA–ARS, Northwest Watershed Research Center, 800 Park Blvd, Ste. 105, Boise, ID 83712, USA (Finzel); Agricultural Technician, USDA–ARS, Grassland, Soil, and Water Research Laboratory, Temple, TX 76502, USA (Spanel); Research Rangeland Management Specialist, USDA–ARS, Exotic and Invasive Weeds Research, 920 Valley Rd, Reno, NV 89512, USA (Weltz); and Rangeland Management Specialist, Central National Technology Support Center, USDA–NRCS, 501 West Felix St, Building 23, Fort Worth, TX 76115, USA (Sanchez). Partial funding was provided by the USDA–National Resource Conservation Service Rangeland Conservation Effects Assessment Project, which supported Mari-Vaughn Johnson's research as a postdoctoral scientist at USDA–ARS Grassland, Soil, and Water Research Laboratory and Julie Finzel's research at Idaho State University. Mention of a proprietary product does not constitute a guarantee or warranty of the product by USDA or the authors and does not imply its endorsement or approval to the exclusion of other products that might be suitable.