AuthorWatters, Susan Elaine, 1959-
KeywordsAgriculture, Range Management.
AdvisorSmith, E. Lamar
MetadataShow full item record
PublisherThe University of Arizona.
RightsCopyright © is held by the author. Digital access to this material is made possible by the University Libraries, University of Arizona. Further transmission, reproduction or presentation (such as public display or performance) of protected items is prohibited except with permission of the author.
AbstractGround cover, species composition, average distance between perennial plants, standing biomass, frequency of bare quadrats, and site stability rating were evaluated as predictor variables in determining the degree of site protection from accelerated soil erosion on a clay loam upland range site. Interpretations of range condition, species diversity, and the WEPP model predicted sediment yield were analyzed to determine their usefulness in detecting a threshold of site protection. Standing biomass, basal cover, average distance between plants and frequency of bare quadrats demonstrated strong correlations to the site stability rating and were useful in examining thresholds of site protection. The WEPP model was useful in determining a threshold of protection with the site stability rating. The diversity index and range condition rating showed poor relationships with the stability indices and plant community attributes measured. Thus, individually, these ratings do not provide and adequate assessment of the degree of site protection.
Degree ProgramGraduate College
Renewable Natural Resources