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CitationDavis, J. H., & Bonham, C. D. (1979). Interference of sand sagebrush canopy with needleandthread. Journal of Range Management, 32(5), 384-386.
PublisherSociety for Range Management
JournalJournal of Range Management
AbstractThe influence of sand sagebrush (Artemisia filifolia) on the biomass of several components of needleandthread (Stipa comata) was studied on grazed and ungrazed sites in eastern Colorado. The components examined were seeds, stems-leaves combined, crowns, and total plant biomass. A significant grazing × association interaction was observed in terms of seed biomass and stem-leaf combined biomass. Sagebrush afforded protection for needleandthread from grazing, which outweighed the effects of interference on grazed sites. In contrast, on the ungrazed site needleandthread biomass was greater in the open than underneath the sage. These results imply that a comparison of yield in pure and mixed stands on grazed sites are not valid for measuring interference effects between shrubs and grasses. The advantage of measuring several plant components in competition studies was also discussed.