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Robert F. Powers
Researcher at United States Forest Service
Publications - 71
Citations - 4289
Robert F. Powers is an academic researcher from United States Forest Service. The author has contributed to research in topics: Soil water & Productivity. The author has an hindex of 32, co-authored 71 publications receiving 4106 citations. Previous affiliations of Robert F. Powers include Oregon State University & United States Department of Agriculture.
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Journal ArticleDOI
The North American long-term soil productivity experiment: Findings from the first decade of research
Robert F. Powers,D. Andrew Scott,Felipe G. Sanchez,Richard A. Voldseth,Deborah S. Page-Dumroese,John D. Elioff,Douglas M. Stone +6 more
TL;DR: In this paper, the impacts of organic matter removal and soil compaction are reported for the 26 oldest installations in the nation-wide network of long-term soil productivity sites, and the results show that complete removal of surface organic matter led to declines in soil C concentration to 20 cm depth and to reduced nutrient availability.
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Glyphosate toxicity and the effects of long-term vegetation control on soil microbial communities.
TL;DR: It is suggested that artificial media assays are of limited relevance in predicting glyphosate toxicity to soil organisms and that field rate applications of glyphosate should have little or no affect on soil microbial communities in ponderosa pine plantations.
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Mineralizable soil nitrogen as an index of nitrogen availability to forest trees
TL;DR: In this paper, a 14-day anaerobic incubation at −0°C was evaluated as an index of forest soil fertility and site productivity, and the results showed that the relative variability in mineralizable soil N decreases with soil depth and increases with the magnitude of the soil test mean.
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Soil compaction effects on growth of young ponderosa pine following litter removal in California's Sierra Nevada
TL;DR: In this article, the authors examined compaction and tree growth relationships on three California soils of contrasting textures (clayey, loamy, and sandy loam) on plots from which the organic soil horizon had been removed.
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Soil physical property changes at the North American long-term soil productivity study sites: 1 and 5 years after compaction
Deborah S. Page-Dumroese,Martin F. Jurgensen,Allan E. Tiarks,Felix Ponder,Felipe G. Sanchez,R.L. Fleming,J. Marty Kranabetter,Robert F. Powers,Douglas M. Stone,John D. Elioff,D. Andrew Scott +10 more
TL;DR: Initial bulk density increases were greater on fine- textured soils than on coarser-textured soils and were mainly due to higher initial bulk density values in coarse- Textured soils.