Spelling suggestions: "subject:"4he river"" "subject:"4he liver""
541 |
Pollination and pollinators of pumpkin and squash (Cucurbita maxima Duchesne) grown for seed production in the Willamette Valley of western OregonGavilánez-Slone, Jenny M. 29 August 2000 (has links)
'Golden Delicious' winter squash (GDWS), Cucurbita maxima Duchesne,
provides significant amounts of pollen (24 mg) and nectar (236 μl), but with a low
reward of 14% nectar sugar. The quantity of nectar produced per GDWS flower
differed between sites and floral sex. The GDWS male flowers had 25% higher
sugar concentration than female flowers. There was no statistical difference in the
percent of nectar sugars per flower between sites, but the interaction between site
and floral sex was statistically significant for the amount of nectar and percent of
nectar sugars. Pollen production per flower differed significantly between sites
with the most productive site producing 27% more, and 45% more than the other
sites.
Pollination efficiency of honeybees and bumble bees was assessed with
field cages (1.8x1.8x1.8 m). No significant differences were found except for the
interaction between the bee treatment and year on number of fruit per cage. This
significant difference reflects the increase in fruit number produced by honey bees
in 1997.
The effect of distance from honey bee hives on fruit and seed quality was
tested, and found significant only for B- and C-seeds weight, which were both less
in the plots farthest from the nearest group of honey bee hives. Placement of honey
bee hives in fields of ≤120 ha appears not to be critical for adequate pollination of
GDWS. Other pollinators (excluding honey bees) were frequent visitors to the
squash flowers studied here - for example, Bombus spp., Megachilids, Halictids,
etc. These other pollinators, mostly bumble bees, accounted for 3.55% of all bee
visits.
Honey bees visited proportionately more female flowers in the morning,
and progressively switched to the more abundant male flowers in the afternoon.
This bias differed by site and year. Bumble bees visited proportionally slightly
more male GDWS flowers than did female flowers and did it in a similar rate
throughout the day. From 15 minute observations each hour of individual female
GDWS flower, we calculated that they received approximately 80 honey bee visits
per day. / Graduation date: 2001
|
542 |
Influence of biomass burning aerosol on land-atmosphere interactions over AmazoniaZhang, Yan 18 July 2005 (has links)
The impacts of biomass burning smoke on local rainfall and the structure of the atmospheric boundary layer have been actively studied in recent years. However, whether the large-scale biomass burning in the later dry season over Amazonia Region could influence the dry-to-wet transition season have not been examined. Previous observations have shown that the substantial increase of rainfall from dry to wet season over Amazonia are actually caused by small changes of the atmospheric thermodynamic structure relative to those over other monsoon regions. Consequently, the onset date of wet season can vary greatly as influenced by external or internal anomalous forcings. Thus, it is possible that the transition of the atmospheric thermodynamic structure and circulation from dry to wet season is also sensitive to the impacts of biomass burning smoke. To test this hypothesis, we have forced RegCM3 model with direct radiative forcing of smoke inferred from MODIS for the transition season (August to November). The comparison with control run helps us to examine the direct and semi-direct influences of smoke on the transition from dry to wet season. Our preliminary results show that the direct and semi-direct forcings of smoke could significantly influence the rainfall and related atmospheric and land surface conditions during the transition. However, these changes are sensitive to the prescribed vertical distribution of the aerosols.
|
543 |
A study of the Boseong River Valley culture /Kim, Gyongtaek, January 2002 (has links)
Thesis (Ph. D.)--University of Oregon, 2002. / Typescript. Includes vita and abstract. Includes bibliographical references (leaves 309-331). Also available for download via the World Wide Web; free to University of Oregon users.
|
544 |
Transnational corporations and their contribution to community development in the Pearl River Delta regionLau, Suet-yee, Cynthia., 劉雪怡. January 2005 (has links)
published_or_final_version / Urban Planning / Master / Master of Science in Urban Planning
|
545 |
Emergence of the Greater Pearl River Delta mega-city region: a study on polycentricityLee, Ka-shing., 李嘉承. January 2010 (has links)
published_or_final_version / Geography / Master / Master of Philosophy
|
546 |
Architecture of estuarine reservoirs of the Cretaceous-Caballos Formation Orito Field, Putumayo Basin, ColombiaAmaya, Carlos Alberto 17 September 2015 (has links)
Orito Field occupies an area of 31 mi² (80 km²) in the west-central portion of the Putumayo Basin, Colombia and forms part of an extensive littoral system that dominated sedimentation during Albian-Aptian time. The Caballos Formation represents the oldest Cretaceous unit, and was deposited at the beginning of a retrogradational episode immediately above the eroded Triassic-Jurassic surface. The Caballos Formation has an average thickness of 240 ft (73 m) and is largely composed of fine grained, highly compacted quartzarenites, cemented by quartz and kaolinite. A geologic model integrating all the available information allows the definition of four depositional events in the Caballos. The lowest depositional unit is composed of fluvial deposits with minor tidal influence. These fluvial sands grade upward into estuarine deposits formed in tidal channels and tidal flats, that are in turn overlain by tidal channel deposits, and are finally eroded and overlain by tidal mouth bars deposits. The vertical facies association is the product of a retrogradational episode and represents deposition in a tide-modified estuary, inside which diagenetic processes acted differently modifying the petrophysical properties of the facies that compose the Caballos reservoir in Orito field. Historical production trends of the Caballos reservoir correlate with the major depositional axes defined in this study and allow to delineation of high potential areas for future development, by means of targeted infill drilling and workovers.
|
547 |
Stage-monitoring network optimization using GISMartínez Martínez, Sergio Ignacio 28 August 2008 (has links)
Not available / text
|
548 |
Groundwater Supply and Irrigation in the Rillito ValleySmith, G. E. P. 12 May 1910 (has links)
This item was digitized as part of the Million Books Project led by Carnegie Mellon University and supported by grants from the National Science Foundation (NSF). Cornell University coordinated the participation of land-grant and agricultural libraries in providing historical agricultural information for the digitization project; the University of Arizona Libraries, the College of Agriculture and Life Sciences, and the Office of Arid Lands Studies collaborated in the selection and provision of material for the digitization project.
|
549 |
Foreign investment and urbanization: a case of the post-1978 Pearl River Delta, China楊春, Yang, Chun, Charlotte. January 1996 (has links)
published_or_final_version / Geography and Geology / Doctoral / Doctor of Philosophy
|
550 |
Perception of quality and changes in preferences of recreational resources of the Lower Colorado River ValleyKolbe, Phillip T. January 1981 (has links)
No description available.
|
Page generated in 0.0725 seconds