Project Number: 5445-21660-003-02
Start Date: Oct 01, 2009
End Date: Sep 30, 2014
Twenty treatments replicated four times will be established at five North Dakota State University (NDSU)Extension Service Experiment Stations (i.e. Hettinger, Williston, Minot, Streeter, and Carrington) in western and central North Dakota. Treatments include two harvests (annual and biennial) of three individual grass species and six mixes. The individual grass species are two switchgrass cultivars, tall wheatgrass, and intermediate wheatgrass. The mixes include: 1. a CRP mix with tall and intermediate wheatgrass; 2. a CRP mix with tall and intermediate wheatgrass plus alfalfa and sweetclover; 3. switchgrass and tall wheatgrass; 4. switchgrass and big bluestem; 5. switchgrasss and alti wildrye; and 6. alti and basin wildryes. Plots will be established and maintained for 10 years at each location by North Dakota Natural Resources Trust (NDNRT) and NDSU staff. Baseline soil samples were collected prior to grass planting and will be compared to soil samples collected 5 years after establishment and 10 years after establishment. Soil samples will be analyzed by USDA-ARS, Northern Great Plains Research Laboratory scientists for gravimetric water content, soil bulk density, electrical conductivity, soil pH, total carbon and nitrogen, soil inorganic carbon, particulate organic matter, extractable nitrate and phosphorus, glomalin, and water-stable aggregation.