Net photosynthesis was measured under field conditions in 23-year-old slash pine (Pinus elliottii Engelm. var. elliottii) trees to determine how it was affected by fertilization and climate. There was only a small decrease in rates of net photosynthesis from late summer through winter demonstrating that appreciable …
Journal: Tree Physiology, Volume 14 (11): 1215-1227 (1994), ISBN . DOI: 10.1093/treephys/14.11.1215 Sites: US-SP1
The concentration, contents, and distribution of nutrients, metals, and soil materials were quantified at the Howland Integrated Forest Study (HIFS) site in eastern Maine. The …
Journal: Canadian Journal Of Soil Science, Volume 73 (3): 317-328 (1993), ISBN . DOI: 10.4141/cjss93-034 Sites: US-Ho1
Journal: Science, Volume 260 (5112): 1314-1317 (1993), ISBN . DOI: 10.1126/science.260.5112.1314 Sites: US-Ha1
Results of an experiment conducted to quantify the ozone deposition onto a deciduous forest stand in an acid-precipitation-impacted area of Canada are presented and discussed. The ozone deposition data were obtained above and within the forest canopy. The deposition process …
Journal: Agricultural And Forest Meteorology, Volume 62 (1-2): 1-18 (1992), ISBN . DOI: 10.1016/0168-1923(92)90002-l Sites: CA-Cbo
In order to develop a model of the carbon cycle for mature slash pine (Pinus elliottii) stands in north Florida, we studied seasonal variation in leaf area index (LAI, allsided), aboveground biomass increment …
Journal: Ecological Monographs, Volume 61 (1): 33-51 (1991), ISBN . DOI: 10.2307/1942998 Sites: US-SP1
The eddy correlation method has great potential for directly measuring trace gas fluxes at the floor of a forest canopy, but a thorough validation study has not been yet conducted. Another appeal of the eddy …
Journal: Journal Of Geophysical Research: Atmospheres, Volume 96 (D4): 7271-7285 (1991), ISBN . DOI: 10.1029/91jd00269 Sites: US-WBW
Two indirect gap fraction methods for estimating leaf area index (LAI) are compared with estimates
from litterfall collections in a mixed-age oak-hickory forest. One indirect method uses averaged,
direct beam penetration data obtained with a moving tram. The second uses a portable light
sensor system that measures diffuse light …
Journal: Agricultural Forest Meteorology, Volume 57: 107-128 (1991), ISBN . DOI: https://doi.org/10.1016/0168-1923(91)90081-Z Sites: US-WBW
A numerical model that simulates the radiation regime inside a fully leafed and leafless deciduous forest canopy is discussed and tested. The model incorporates features which account for the vertical variation in leaf inclination angles and penumbral effects; these features have been experimentally shown to significantly influence …
Journal: Agricultural And Forest Meteorology, Volume 46 (4): 313-337 (1989), ISBN . DOI: 10.1016/0168-1923(89)90034-8 Sites: US-WBW
An intensive investigation of particulate sulfur fluxes to a deciduous forest was conducted at Oak Ridge, Tennessee, during May 1983, as part of a multilaboratory program to study the dry deposition of airborne trace gases and aerosols to vegetated surfaces. At this time, the leaf area was approximately 50% of the maximum and was …
Journal: Journal Of Geophysical Research: Atmospheres, Volume 94 (D10): 13003-n/a (1989), ISBN . DOI: 10.1029/jd094id10p13003 Sites: US-WBW
Journal: Tree Physiology, Volume 5 (3): 357-377 (1989), ISBN . DOI: 10.1093/treephys/5.3.357 Sites: US-WBW