This experiment has been added by the GLTEN Curators using existing published sources.
To serve as a baseline for evaluating other experiments at Pendleton
The perennial grassland site has no experimental variables and is intended to approximate a native grasslands and serves as a baseline for evaluating changes in other experiments.
Since 2004 data measurements taken include above-ground productivity and species counts. Soil is sampled every 5 and 10 years and analyzed for nutrients and SOM.
Data Access Statement
Columbia Basin Agricultural Research Center, University of Oregon
The site is periodically reseeded with introduced grass selections: dominant grass species are bluebunch wheatgrass (Agropyron spicatum) with lesser amounts of Idaho fescue (Festuca idahoensis). Occassional fertilizers are applied and weeds are controlled as needed. It was grazed occasionally until 1985 and vegetation is sometimes clipped during or after summer growth.
Soils are coarse silty mixed mesic Typic Haploxerolls
The climate is semi-arid, but partially influenced by maritime winds from the Pacific Ocean. Winters are cool and wet, and summers are hot and dry