Nitrogen (N) deposition and its impact on terrestrial and aquatic ecosystems is a concern facing federal land managers at the Lye Brook Wilderness in Vermont and other protected areas throughout the northeastern United States. In this study, we compared N production in soils with N concentrations…
Keywords: nitrification, nitrogen, nitrogen mineralization, soil water, stream chemistry, wilderness area
Source: Water, Air, and Soil Pollution. 122: 63-75.
Ridge and coulee terrain has little effect on point rainfall, but snowpack accumulation is affected by degree of slope and aspect. North slopes accumulate about 50% more snow. Soil water depletion is little affected by aspect. South slopes receive more insulation than north slopes, but…
Keywords: rainfall, snowpack, temperature, radiation, soil water
Source: Research Paper NC-74. St. Paul, MN: U.S. Dept. of Agriculture, Forest Service, North Central Forest Experiment Station
Elevated concentrations of atmospheric carbon dioxide ([CO2]) and tropospheric ozone ([O3]) have the potential to affect tree physiology and structure and hence forest water use, which has implications for climate feedbacks. We investigated how a 40% increase above ambient values in [CO2] and [O3…
Keywords: climate, FACE, leaf area index, soil water, transpiration, tree community
Source: Tree Physiology 28: 1231-1243.
Ten years after planting, European larch and red pine diameters averaged 11.2 and 9.6 cm, and heights averaged 9.7 and 5.1 m. Litter on the larch plots was twice as heavy as on the pine and unplanted conrtol plots. Organic carbon content of the top 5 cm of soil appeared to reflect vegetation…
Keywords: land use, soil properties, soil water, forestation, watershed management
Source: Research Note NC-144. St. Paul, MN: U.S. Dept. of Agriculture, Forest Service, North Central Forest Experiment Station
Municipal and papermill wastewater sludges were applied to conifer and hardwood forests growing on sand soils (Entic Haplorthods, Spodle Udipsamments, and Alfic Haplothods), in northwestern Lower Michigan where annual precipitation averages 765 mm/y.To investigate the impact of sludge on nitrate-N…
Keywords: Pinus resinose, Pinus strobus, Populus grandidentata, soil water, nitrate leaching
Source: Journal of Environmental Quality 12(4): 487-492.
In southern Mississippi, the heights of loblolly and slash pines at age 20 were positively correlated with the phosphorus content of the foliage and with depth in the soil to gray (chromas £2) mottles. Slash pine was taller than loblolly at equivalent levels of foliage phosphorus, but the rate of…
Keywords: Gray mottles, phosphorus soil test, soil-site, soil water
Source: Res. Note SO-285. New Orleans, LA: U.S. Department of Agriculture, Forest Service, Southern Forest Experiment Station. 5 p.
Kudzu is an aggressive, nonnative vine that currently dominates an estimated 810,000 ha of mesic forest communities in the eastern United States. To test an integrated method of weed control, abundances of kudzu and other plant species were compared during 4 yr after six herbicide treatments (…
Keywords: Integrated weed control, invasive weeds, interference, crown cover, biomass, light intensity, soil water
Source: Weed Science. 51: 965–974
This paper presents an interactive computer program written in BASIC language that will calculate soil bulk density and moisture percentage by weight and volume. Coarse fragment weights are required. The program will also summarize the resulting data giving mean, standard deviation, and 95-percent…
Keywords: Soil bulk density, soil water, soil monitoring, computer programs / programing
Source: Gen. Tech. Rep. PNW-GTR-153. Portland, OR: U.S. Department of Agriculture, Forest Service, Pacific Northwest Research Station. 16p
Summary - Vegetation helps stabilize forested slopes by providing root strength and by modifying the saturated soil water regime. Plant roots can anchor through the soil mass into fractures in bedrock, can cross zones of weakness to more stable soil, and can provide interlocking long fibrous…
Keywords: PSW4351, landslides, soil water, root strength, forests, slope stabilit
Source: Proceedings of the International Union of Forestry Research Organizations, XVII World Congress, 6-17 September 198l, Kyoto, Japan. vol. I: 297-308.
This paper presents an improved version of BDEN, an interactive computer program written in FORTRAN 77 that will calculate soil bulk density and moisture percentage by weight and volume. Calculations allow for deducting coarse fragment weight and volume. The program will also summarize the…
Keywords: Soil bulk density, soil water, soil monitoring, computer programs, programming
Source: Gen. Tech. Rep. PNW-GTR-211. Portland, OR: U.S. Department of Agriculture, Forest Service, Pacific Northwest Research Staion. 6 p