Journal article
Comparison of Temporal Differences in Models of Soil Moisture and Plant Biomass Variability in the Southern Great Plains of the United States
The Geographical Bulletin, Vol.32(1), pp.28-45
1990
Abstract
Multiple regression models of soil moisture at 15, 61, and 91 cm depths, and for above-ground plant biomass explained 92, 90, 92, and 88 percent of the variability, respectively, through field data collected in 1986. Multiple regression models developed for soil moisture and plant biomass, through data collected in 1985, answered 83, 91, and 82 percent, and 85 percent of the variability, respectively. Field data were collected along a 200 km transect in west-central Oklahoma from May through August 1985 and 1986: four sites were eliminated in 1986 and sampling was changed from weekly to bi-weekly. Air temperature, precipitation levels, soil moisture and plant biomass for 1985 and 1986 were compared through calculation of means and standard deviations for each field site and for each principal variable throughout the sample period . Graphic summaries indicate the difference between the sample weeks and years, and show the relationship between atmospheric conditions and soil and vegetation variation. Transect location, spatial and temporal field sampling characteristics, amount and variability in weekly and yearly precipitation levels and air temperatures, and the strength of the environmental gradient across the sample transect contribute to the level of explanation of the regression models and the differences between the models for each sample year.
Details
- Title
- Comparison of Temporal Differences in Models of Soil Moisture and Plant Biomass Variability in the Southern Great Plains of the United States
- Authors
- Stephen J Walsh (Author) - University of North Carolina at Chapel Hill, United States
- Publication details
- The Geographical Bulletin, Vol.32(1), pp.28-45
- Publisher
- Gamma Theta Upsilon
- Date published
- 1990
- ISSN
- 0731-3292
- Organisation Unit
- University of the Sunshine Coast, Queensland
- Language
- English
- Record Identifier
- 99449305602621
- Output Type
- Journal article
Metrics
2 File views/ downloads
576 Record Views