Gregory B Lawrence (Former Employee)
Science and Products
Filter Total Items: 109
One-day rate measurements for estimating net nitrification potential in humid forest soils One-day rate measurements for estimating net nitrification potential in humid forest soils
Measurements of net nitrification rates in forest soils have usually been performed by extended sample incubation (2-8 weeks), either in the field or in the lab. Because of disturbance effects, these measurements are only estimates of nitrification potential and shorter incubations may suffice. In three separate studies of northeastern USA forest soil surface horizons, we found that...
Authors
D.S. Ross, G. Fredriksen, A.E. Jamison, B.C. Wemple, S.W. Bailey, J. B. Shanley, G.B. Lawrence
Quality-assurance data for routine water analyses by the U.S. Geological Survey Laboratory in Troy, New York—July 1995 through June 1997 Quality-assurance data for routine water analyses by the U.S. Geological Survey Laboratory in Troy, New York—July 1995 through June 1997
The laboratory for analysis of low-ionic-strength water at the U.S. Geological Survey (USGS) office in Troy, N.Y. analyzes samples collected by USGS projects in the Northeast. The laboratory’s quality-assurance program is based on internal and interlaboratory quality-assurance samples and quality-control procedures developed to ensure proper sample collection, processing, and analysis...
Authors
Tricia A. Lincoln, Debra A. Horan-Ross, Michael R. McHale, Gregory B. Lawrence
Climate dependency of tree growth suppressed by acid deposition effects on soils in Northwest Russia Climate dependency of tree growth suppressed by acid deposition effects on soils in Northwest Russia
Increased tree growth in temperate and boreal forests has been proposed as a direct consequence of a warming climate. Acid deposition effects on nutrient availability may influence the climate dependency of tree growth, however. This study presents an analysis of archived soil samples that has enabled changes in soil chemistry to be tracked with patterns of tree growth through the 20th...
Authors
G.B. Lawrence, A.G. Lapenis, D. Berggren, B.F. Aparin, K.T. Smith, W.C. Shortle, S.W. Bailey, D.L. Varlyguin, B. Babikov
Use of stream chemistry for monitoring acidic deposition effects in the Adirondack region of New York Use of stream chemistry for monitoring acidic deposition effects in the Adirondack region of New York
Acid-neutralizing capacity (ANC) and pH were measured weekly from October 1991 through September 2001 in three streams in the western Adirondack Mountain region of New York to identify trends in stream chemistry that might be related to changes in acidic deposition. A decreasing trend in atmospheric deposition of SO42- was observed within the region over the 10-yr period, although most...
Authors
G.B. Lawrence, B. Momen, K. M. Roy
Acidification of forest soil in Russia: From 1893 to present Acidification of forest soil in Russia: From 1893 to present
It is commonly believed that fine-textured soils developed on carbonate parent material are well buffered from possible acidification. There are no data, however, that document resistance of such soils to acidic deposition exposure on a timescale longer than 30-40 years. In this paper, we report on directly testing the long-term buffering capacity of nineteenth century forest soils...
Authors
A.G. Lapenis, G.B. Lawrence, A.A. Andreev, A.A. Bobrov, M.S. Torn, J.W. Harden
Mineralization and nitrification patterns at eight northeastern USA forested research sites Mineralization and nitrification patterns at eight northeastern USA forested research sites
Nitrogen transformation rates in eight northeastern US research sites were measured in soil samples taken in the early season of 2000 and the late season of 2001. Net mineralization and nitrification rates were determined on Oa or A horizon samples by two different sampling methods - intact cores and repeated measurements on composite samples taken from around the cores. Net rates in the...
Authors
D.S. Ross, G.B. Lawrence, G. Fredriksen
Science and Products
Filter Total Items: 109
One-day rate measurements for estimating net nitrification potential in humid forest soils One-day rate measurements for estimating net nitrification potential in humid forest soils
Measurements of net nitrification rates in forest soils have usually been performed by extended sample incubation (2-8 weeks), either in the field or in the lab. Because of disturbance effects, these measurements are only estimates of nitrification potential and shorter incubations may suffice. In three separate studies of northeastern USA forest soil surface horizons, we found that...
Authors
D.S. Ross, G. Fredriksen, A.E. Jamison, B.C. Wemple, S.W. Bailey, J. B. Shanley, G.B. Lawrence
Quality-assurance data for routine water analyses by the U.S. Geological Survey Laboratory in Troy, New York—July 1995 through June 1997 Quality-assurance data for routine water analyses by the U.S. Geological Survey Laboratory in Troy, New York—July 1995 through June 1997
The laboratory for analysis of low-ionic-strength water at the U.S. Geological Survey (USGS) office in Troy, N.Y. analyzes samples collected by USGS projects in the Northeast. The laboratory’s quality-assurance program is based on internal and interlaboratory quality-assurance samples and quality-control procedures developed to ensure proper sample collection, processing, and analysis...
Authors
Tricia A. Lincoln, Debra A. Horan-Ross, Michael R. McHale, Gregory B. Lawrence
Climate dependency of tree growth suppressed by acid deposition effects on soils in Northwest Russia Climate dependency of tree growth suppressed by acid deposition effects on soils in Northwest Russia
Increased tree growth in temperate and boreal forests has been proposed as a direct consequence of a warming climate. Acid deposition effects on nutrient availability may influence the climate dependency of tree growth, however. This study presents an analysis of archived soil samples that has enabled changes in soil chemistry to be tracked with patterns of tree growth through the 20th...
Authors
G.B. Lawrence, A.G. Lapenis, D. Berggren, B.F. Aparin, K.T. Smith, W.C. Shortle, S.W. Bailey, D.L. Varlyguin, B. Babikov
Use of stream chemistry for monitoring acidic deposition effects in the Adirondack region of New York Use of stream chemistry for monitoring acidic deposition effects in the Adirondack region of New York
Acid-neutralizing capacity (ANC) and pH were measured weekly from October 1991 through September 2001 in three streams in the western Adirondack Mountain region of New York to identify trends in stream chemistry that might be related to changes in acidic deposition. A decreasing trend in atmospheric deposition of SO42- was observed within the region over the 10-yr period, although most...
Authors
G.B. Lawrence, B. Momen, K. M. Roy
Acidification of forest soil in Russia: From 1893 to present Acidification of forest soil in Russia: From 1893 to present
It is commonly believed that fine-textured soils developed on carbonate parent material are well buffered from possible acidification. There are no data, however, that document resistance of such soils to acidic deposition exposure on a timescale longer than 30-40 years. In this paper, we report on directly testing the long-term buffering capacity of nineteenth century forest soils...
Authors
A.G. Lapenis, G.B. Lawrence, A.A. Andreev, A.A. Bobrov, M.S. Torn, J.W. Harden
Mineralization and nitrification patterns at eight northeastern USA forested research sites Mineralization and nitrification patterns at eight northeastern USA forested research sites
Nitrogen transformation rates in eight northeastern US research sites were measured in soil samples taken in the early season of 2000 and the late season of 2001. Net mineralization and nitrification rates were determined on Oa or A horizon samples by two different sampling methods - intact cores and repeated measurements on composite samples taken from around the cores. Net rates in the...
Authors
D.S. Ross, G.B. Lawrence, G. Fredriksen