Academic literature on the topic 'Tree water use'

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Journal articles on the topic "Tree water use"

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Glenn, D. M., J. W. Worthington, W. V. Welker, and M. J. McFarland. "Estimation of Peach Tree Water Use Using Infrared Thermometry." Journal of the American Society for Horticultural Science 114, no. 5 (1989): 737–41. http://dx.doi.org/10.21273/jashs.114.5.737.

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Abstract Infrared (IR) thermometry has not been extensively applied in deciduous tree fruit production to determine water use. The objectives of this study were to a) examine IR measurement techniques for evaluating canopy temperatures in peach [Prunus persica (L.) Batsch.] trees; b) evaluate a foliage-minus-air temperature- (Tc – Ta) based diffusion equation for vapor flux used to predict tree water use; and c) measure the Tc – Ta response of irrigated peach trees over a range of air vapor pressure deficits. The mean Tc – Ta for a tree was similar for readings made from the canopy sides (hori
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Levitt, D. G., J. R. Simpson, and J. L. Tipton. "Water Use of Two Landscape Tree Species in Tucson, Arizona." Journal of the American Society for Horticultural Science 120, no. 3 (1995): 409–16. http://dx.doi.org/10.21273/jashs.120.3.409.

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Although water conservation programs in the arid southwestern United States have prompted prudent landscaping practices such as planting low water use trees, there is little data on the actual water use of most species. The purpose of this study was to determine the actual water use of two common landscape tree species in Tucson, Ariz., and water use coefficients for two tree species based on the crop coefficient concept. Water use of oak (Quercus virginiana `Heritage') and mesquite (Prosopis alba `Colorado') trees in containers was measured from July to October 1991 using a precision balance.
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Kjelgren, Roger. "MODELING WATER USE OF SHADE TREES IN FIELD PRODUCTION NURSERIES." HortScience 31, no. 6 (1996): 916C—916. http://dx.doi.org/10.21273/hortsci.31.6.916c.

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Supplemental watering of shade trees in field production nurseries is needed, even in summer-rainfall climates, to achieve maximum growth. Scheduling the timing and amount of supplemental watering makes more efficient use of financial and water resources while maintaining maximum growth. Methods of scheduling supplemental watering based on uniform canopy and rooting in production agriculture must be modified, however, for shade trees in a production setting. Nursery trees are non-uniform in canopy and rooting compared to an agricultural crop. Applying the water budget method can be effective w
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Steinberg, Susan L., Marshall J. McFarland, and Josiah W. Worthington. "Antitranspirant Reduces Water Use by Peach Trees Following Harvest." Journal of the American Society for Horticultural Science 115, no. 1 (1990): 20–24. http://dx.doi.org/10.21273/jashs.115.1.20.

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The potential for reducing water use of peach [Prunus persica (L.) Batsch] trees with antitranspirants following fruit harvest was investigated using matched peach trees planted in an outdoor twin weighing lysimeter facility. A 10% solution of the antitranspirant Wilt Pruf NCF was applied to one of the two trees on 7 July 1986. Immediately after application, water use of the treated tree was reduced by 40%. One month after treatment, the water use was reduced 30% and, by the termination of the experiment (85 days after treatment), water use was reduced 12% as compared to control. The average r
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Vrecenak, Arthur J. "SHADE TREE TRANSPIRATION AND WATER USE." Arboricultural Journal 12, no. 1 (1988): 77–81. http://dx.doi.org/10.1080/03071375.1988.9756379.

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Fernández, J. E., and F. Moreno. "Water Use by the Olive Tree." Journal of Crop Production 2, no. 2 (2000): 101–62. http://dx.doi.org/10.1300/j144v02n02_05.

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Simpson, David G. "Water use of interior Douglas-fir." Canadian Journal of Forest Research 30, no. 4 (2000): 534–47. http://dx.doi.org/10.1139/x99-233.

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Water use of individual Douglas-fir (Pseudotsuga menziesii var. glauca (Beissn.) Franco) trees was measured in two plots at a forest site in southern British Columbia, Canada. Average daily early summer water use by trees with diameters of 7.5-70 cm varied from 1.8 to 166 L. Sap flux density (cm3 water/cm2 sapwood per hour) was linearly related to shoot xylem pressure potential and was found to increase with increasing vapour pressure deficit (VPD) and short-wave irradiance (I), reaching maximum rates with VPD > 0.6 kPa and I > 200 W·m-2. Daily sap flux density varied among trees but was
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Maier, Burley, Cook, Ghezehei, Hazel, and Nichols. "Tree Water Use, Water Use Efficiency, and Carbon Isotope Discrimination in Relation to Growth Potential in Populus deltoides and Hybrids under Field Conditions." Forests 10, no. 11 (2019): 993. http://dx.doi.org/10.3390/f10110993.

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We explored the relationship between tree growth, water use, and related hydraulic traits in Populus deltoides Bartr. ex Marsh.and hybrid clones, to examine potential trade-offs between growth and water use efficiency. Nine genotypes, six P. deltoides and three hybrid clones, that represented genotypes with high (Group H), intermediate (Group I), and low (Group L) growth performance were selected for study, based on year-two standing stem biomass in a replicated field trial. In year four, tree growth, transpiration (Et), canopy stomatal conductance (Gs), whole-tree hydraulic conductance (Gp),
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Khemira, H., L. E. Schrader, F. J. Peryea, R. Kammereck, and R. Burrows. "Effect of Rootstock on Nitrogen and Water Use in Apple Trees." HortScience 32, no. 3 (1997): 486A—486. http://dx.doi.org/10.21273/hortsci.32.3.486a.

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One-year-old `Fuji' apple trees on six rootstocks (Mark, M.9, M.26, M.7A, MM.106, and MM.111) were compared for N and water uptake and utilization. The trees were potted in sand and subjected to a 75-day N-deprivation period (supplied with modified Hoagland's solution lacking N) to deplete their N reserves. Thereafter, they were supplied with a complete modified Hoagland's solution. Uptake of water and N differed by rootstock. Water and N uptake were positively related to tree dry weight (r = +0.97, P = 0.001). Trees that had the highest N concentrations at planting were the last to set bud du
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Jones, Benjamin A., and John Fleck. "Urban Trees and Water Use in Arid Climates: Insights from an Integrated Bioeconomic-Health Model." Water Economics and Policy 04, no. 04 (2018): 1850022. http://dx.doi.org/10.1142/s2382624x18500224.

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Managing outdoor water use while maintaining urban tree cover is a key challenge for water managers in arid climates. Urban trees generate flows of ecosystem services in arid areas, but also require significant amounts of irrigation. In this paper, a bioeconomic-health model of trees and water use is developed to investigate management of an urban forest canopy when irrigation is costly, water has economic value, and trees provide ecosystem services. The optimal tree irrigation decision is illustrated for Albuquerque, New Mexico, an arid Southwest US city. Using a range of monetary values for
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Dissertations / Theses on the topic "Tree water use"

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Zhang, Heping. "Water use in a poplar tree-pasture system." Thesis, University of Reading, 1996. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.336665.

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Hentschel, Rainer. "Water use – from leaf to tree to stand level." Doctoral thesis, Humboldt-Universität zu Berlin, Lebenswissenschaftliche Fakultät, 2016. http://dx.doi.org/10.18452/17497.

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Im Fokus dieser Arbeit steht die physiologische Reaktion von Einzelbäumen gegenüber Trockenheit. Das angewandte hydrodynamische Xylemwasserfluss (XWF) Model liefert eine hydrologische Abbildung der Einzelbäume. Aufgrund des funktionalen Zusammenhanges zwischen dem Blattwasserpotential und der stomatären Leitfähigkeit erlaubt das XWF Modell eine öko-physiologische Simulation der stomatären Reaktion auf Blattebene. Hieraus ergeben sich auch Rückschlüsse auf die Assimilationsleistung. Als integratives Maß des Verhältnisses zwischen der Kohlenstoffaufnahme und dem Wasserverbrauch werden die stabil
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Levitt, Daniel Glenn. "Water use of two desert landscape tree species in Tucson, Arizona." Diss., The University of Arizona, 1992. http://hdl.handle.net/10150/185911.

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Although water conservation programs in the arid Southwest have prompted prudent landscaping practices such as planting low water use trees, there is little data on the actual water use of most species. Few methods or models have been developed for measuring tree water use. The stem heat balance method is one such method. Predictive models of tree water use have been limited to applications of the Penman-Monteith (PM) equation with varying degrees of success. The purpose of this study was: to validate stem flow gauge accuracy in a greenhouse and a desert environment; to determine the actual wa
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Wang, Xin. "Linking Hydroperiod with Water Use and Nutrient Accumulation in Wetland Tree Islands." Scholarly Repository, 2011. http://scholarlyrepository.miami.edu/oa_dissertations/531.

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Many large terrestrial ecosystems have patterned landscapes as a result of a positive feedback system between vegetation communities and environmental factors. One example is tree island habitats in the Florida Everglades. Although they only occupy a small portion of the Everglades landscape, tree islands are important features as the focus of nutrient accumulation and wildlife biodiversity in the Everglades ecosystem. The hardwood hammock community on the elevated head of tree island habitats can accumulate high phosphorus concentration in the otherwise P-limited Everglades ecosystem. In this
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Gush, Mark Baudert. "Water-use, growth and water-use efficiency of indigenous tree species in a range of forest and woodland systems in South Africa." Doctoral thesis, University of Cape Town, 2011. http://hdl.handle.net/11427/10565.

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This study was initiated to explore whether indigenous tree species use less water than introduced plantation tree species, whether they use that water more efficiently in terms of biomass accumulation, and consequently whether there is scope for the expansion of indigenous tree production systems in South Africa.
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Mapeto, Tatenda. "Single tree water use and water-use efficiencies of selected indigenous and introduced forest species in the southern Cape region of South Africa." Thesis, Nelson Mandela Metropolitan University, 2015. http://hdl.handle.net/10948/11493.

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In South Africa, the limited extent of indigenous forests accelerated the development of fast-growing introduced species plantations, on which the country is now heavily reliant for its fibre and timber products. However, the plantation forestry industry is challenged with limited freshwater resources, the need for sustainable management of introduced tree species in commercial forest production systems, and a diversity of plant ecological production factors such as soils that have to be manipulated for the purposes of increasing production capacities. Additionally, plantations are established
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Snyder, Keirith Ann. "Environmental and physiological controls on water source use by semi-arid riparian tree species." Diss., The University of Arizona, 2001. http://hdl.handle.net/10150/279782.

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A general paradigm in semi-arid and arid systems is that woody plants with dimorphic root systems will exhibit preferential use of deeper soil water because it represents a more stable source of water than short duration pulses of shallow soil moisture derived from summer rainfall. However, whether this holds across all woody species and whether use of deeper soil water interacts with use of shallow soil water is not determined for many species in different ecosystems. Understanding the amount of water plants derive from groundwater and shallow soil water is critically important to accurate ca
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Bunnell, Michael Cameron. "Water Use of Four Commonly Planted Landscape Tree Species in a Semi-Arid Suburban Environment." BYU ScholarsArchive, 2015. https://scholarsarchive.byu.edu/etd/6146.

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Native plant communities and agricultural land are commonly converted to urban areas as cities across the Western United States continue to grow and expand. This expansion is typically accompanied by afforestation where a common goal among communities is to maximize shade tree composition. Planted forests in these regions are commonly composed of introduced tree species native to mesic environments and their ability to persist is dependent on consistent irrigation inputs. Many potential ecosystem services may be derived from planting trees in urban and suburban areas; however, there are also c
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Hasnat, Abul, University of Western Sydney, of Science Technology and Environment College, and School of Environment and Agriculture. "Soil-water use and irrigation scheduling under fruit tree-turf alley cropping system in Hawkesbury Area." THESIS_CSTE_EAG_Hasnat_A.xml, 2003. http://handle.uws.edu.au:8081/1959.7/614.

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Efficient use of irrigation and nutrients are becoming increasingly important in commercial orchards in the Hawkesbury area. Proper irrigation scheduling practices can help in the better use of irrigation water and reduce environmental impacts. Field experiments were conducted during February 1999 to June 2000 to understand soil-water use, and to evaluate farmer’s irrigation practice under an alley cropping system consisting of turf and stone fruits. The study was carried out at Atlas Farm, 3.5 km from the University of Western Sydney, Hawkesbury campus. The experimental site is a floodplain o
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Ahongshangbam, Joyson [Verfasser]. "Tree and oil palm water use: scaling, spatial heterogeneity and temporal dynamics (Sumatra, Indonesia) / Joyson Ahongshangbam." Göttingen : Niedersächsische Staats- und Universitätsbibliothek Göttingen, 2020. http://d-nb.info/122090936X/34.

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Books on the topic "Tree water use"

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R, Calder Ian, Hall R. L, and Adlard P. G, eds. Growth and water use of forest plantations. Wiley, 1992.

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Ramírez, Joaquín Sosa. Agua y sustentabilidad en Aguascalientes: Tres ensayos. CIEMA, 1998.

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Rumpf, Georg Eberhard. The Ambonese herbal: Being a description of the most noteworthy trees, shrubs, herbs, land- and water-plants which are found in Amboina and the surrounding islands according to their shape, various names, cultivation, and use : together with several insects and animals : for the most part with the figures pertaining to them : all gathered with much trouble and diligence over many years and described in twelve books. Yale University Press, 2010.

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The Ambonese herbal: Being a description of the most noteworthy trees, shrubs, herbs, land- and water-plants which are found in Amboina and the surrounding islands according to their shape, various names, cultivation, and use : together with several insects and animals : for the most part with the figures pertaining to them : all gathered with much trouble and diligence over many years and described in twelve books. Yale University Press, 2010.

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Dyer, Harriet. Little Book of Going Green: Really Understand Climate Change, Use Greener Products, Adopt a Tree, Save Water, and Much More! Skyhorse Publishing Company, Incorporated, 2019.

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Connellan, Geoff. Water Use Efficiency for Irrigated Turf and Landscape. CSIRO Publishing, 2013. http://dx.doi.org/10.1071/9780643106888.

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Achieving high water use efficiency in maintaining turf, trees and landscape areas is a core responsibility of open space managers. Water Use Efficiency for Irrigated Turf and Landscape provides a logical and scientifically sound approach to irrigation in urban areas in Australia. It is based on green space delivering defined outcomes using the principles of water sensitive urban design and irrigation efficiency.
 The book covers all stages of the water pathway – from the source to delivery into the plant root zone. Major topics include system planning, estimating water demand, water qual
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Books, PetCraze. Pet Tree Python Care Notes: Customized Easy to Use, Daily Pet Snake Accessories Care Log Book to Look after All Your Pet Snake's Needs. Great for Recording Feeding, Water, Health, Cleaning, Tank Temperature, and Equipment Maintenance. Independently Published, 2020.

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Nambiar, Sadanandan, and Ian Ferguson. New Forests. CSIRO Publishing, 2005. http://dx.doi.org/10.1071/9780643093089.

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There is no question that the timber industry needs to adopt sustainable practices that ensure a future for the industry. This book goes well beyond simply growing commercial tree plantations for wood production. It explores new forests that can supply environmental services such as salinity mitigation and carbon sequestration together with commercial wood production in an environment beyond the boundaries of traditional forestry.
 New Forests targets agricultural landscapes affected by salinity and which generally have rainfall less than 650 mm per year. The book addresses vital issues s
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Murray, Helene. Managing water use and growth of a perennial ryegrass living mulch in Christmas trees. 1988.

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Stahle, David W., Dorian J. Burnette, Daniel Griffin, and Edward R. Cook. Thirteenth Century AD. Oxford University Press, 2017. http://dx.doi.org/10.1093/oso/9780199329199.003.0009.

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The hypothesis that a prolonged drought across southwestern North America in the late thirteenth century contributed to the abandonment of the region by Ancestral Pueblo populations, ultimately including the depopulation of the Mesa Verde region, continues to be a focus of archaeological research in the Pueblo region. We address the hypothesis through the re-measurement of tree-ring specimens from living trees and archaeological wood at Mesa Verde, Colorado, to derive chronologies of earlywood, latewood, and total ring width. The three chronology types all date from AD 480 to 2008 and were use
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Book chapters on the topic "Tree water use"

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Allen, Scott T., Matthias Sprenger, Gabriel J. Bowen, and J. Renée Brooks. "Spatial and Temporal Variations in Plant Source Water: O and H Isotope Ratios from Precipitation to Xylem Water." In Stable Isotopes in Tree Rings. Springer International Publishing, 2022. http://dx.doi.org/10.1007/978-3-030-92698-4_18.

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AbstractThe water present within trees when sugars and cellulose are formed is the source of hydrogen and oxygen atoms that are incorporated into tree-ring cellulose (see Chaps. 10.1007/978-3-030-92698-4_10 and 10.1007/978-3-030-92698-4_11). However, the isotope composition of relevant water pools is often unknown when trying to interpret δ18O and δ2H isotopic records in tree rings. This chapter focuses on the factors that can influence the O and H isotope ratios of source waters for trees. Trees generally use water that originated as precipitation, but this does not mean that the isotope ratios of water used by trees—predominantly taken up by roots from soils—and incorporated in cellulose exactly matches precipitation isotope ratios. Precipitation isotope ratios vary in space and time, and only a fraction of all precipitation infiltrates soils, reaches roots, and is ultimately taken up by trees. Considering species, soils, and climates may allow for predicting which fraction of water resides in the root-zone during the growing seasons, and how its isotope ratios deviate from that of average precipitation. Here we provide an overview of the terrestrial water cycle and the associated transport and fractionation processes that influence the stable isotope ratios of water used by trees. We highlight obstacles and opportunities to be considered, towards more accurately interpreting the records of O and H isotope ratios in tree cellulose.
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Allen, Scott T., Matthias Sprenger, Gabriel J. Bowen, and J. Renée Brooks. "Spatial and Temporal Variations in Plant Source Water: O and H Isotope Ratios from Precipitation to Xylem Water." In Stable Isotopes in Tree Rings. Springer International Publishing, 2022. http://dx.doi.org/10.1007/978-3-030-92698-4_18.

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AbstractThe water present within trees when sugars and cellulose are formed is the source of hydrogen and oxygen atoms that are incorporated into tree-ring cellulose (see Chaps. 10.1007/978-3-030-92698-4_10 and 10.1007/978-3-030-92698-4_11). However, the isotope composition of relevant water pools is often unknown when trying to interpret δ18O and δ2H isotopic records in tree rings. This chapter focuses on the factors that can influence the O and H isotope ratios of source waters for trees. Trees generally use water that originated as precipitation, but this does not mean that the isotope ratios of water used by trees—predominantly taken up by roots from soils—and incorporated in cellulose exactly matches precipitation isotope ratios. Precipitation isotope ratios vary in space and time, and only a fraction of all precipitation infiltrates soils, reaches roots, and is ultimately taken up by trees. Considering species, soils, and climates may allow for predicting which fraction of water resides in the root-zone during the growing seasons, and how its isotope ratios deviate from that of average precipitation. Here we provide an overview of the terrestrial water cycle and the associated transport and fractionation processes that influence the stable isotope ratios of water used by trees. We highlight obstacles and opportunities to be considered, towards more accurately interpreting the records of O and H isotope ratios in tree cellulose.
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Ewers, Brent E., Ben Bond-Lamberty, and D. Scott Mackay. "Consequences of Stand Age and Species’ Functional Trait Changes on Ecosystem Water Use of Forests." In Tree Physiology. Springer Netherlands, 2011. http://dx.doi.org/10.1007/978-94-007-1242-3_18.

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Saurer, Matthias, and Steve Voelker. "Intrinsic Water-Use Efficiency Derived from Stable Carbon Isotopes of Tree-Rings." In Stable Isotopes in Tree Rings. Springer International Publishing, 2022. http://dx.doi.org/10.1007/978-3-030-92698-4_17.

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AbstractStable carbon isotopes in tree-rings are not only useful to derive climatic information of the past. Based on the isotope fractionations during uptake and fixation of CO2, physiological information can be retrieved, namely the ratio of assimilation to stomatal conductance, which is termed the intrinsic water-use efficiency (iWUE). This crucial plant physiological trait varies among species and environments and is characteristic of how much water is lost from leaves for a certain carbon gain. iWUE is of great importance at the scale of individual plants because it can determine plant performance and survival. iWUE also contributes how closely canopy- or ecosystem-scale carbon and water fluxes are coupled or divergent, which has implications for understanding biogeochemical cycling. Carbon isotopes in tree-rings can be used to estimate how iWUE of trees has changed in the past, e.g. due to increasing CO2, nitrogen or other factors. Accordingly, many applications have explored this tool for various forest ecosystems across the globe, often reporting a strong increase in iWUE over the twentieth century. Explicit comparisons of tree-ring iWUE to growth-data obtained from the same rings can help distinguish among strategies plants employ under various environmental impacts, like increasing CO2, light limitation, drought or too much water. In this chapter, we describe the theory behind iWUE, show some limitations of the method, give examples of the combined application of iWUE and tree-ring width, discuss photosynthetic limitations of iWUE and finally show how the method has been applied in large-scale tree-ring networks.
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Dracup, John A., and Donald R. Kendall. "Risk and Reliability in Predicting Droughts: The Use of Prehistoric Tree-Ring Data." In Water Resources Engineering Risk Assessment. Springer Berlin Heidelberg, 1991. http://dx.doi.org/10.1007/978-3-642-76971-9_23.

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Baltrėnaitė, Edita, Pranas Baltrėnas, and Arvydas Lietuvninkas. "Use of Wood Products for Water and Soil Quality Improvement." In The Sustainable Role of the Tree in Environmental Protection Technologies. Springer International Publishing, 2016. http://dx.doi.org/10.1007/978-3-319-25477-7_6.

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Green, Steve, Brent Clothier, Horst Caspari, and Sue Neal. "Rootzone processes, tree water-use, and the equitable allocation of irrigation water to olives." In Environmental Mechanics: Water, Mass and Energy Transfer in the Biosphere. American Geophysical Union, 2002. http://dx.doi.org/10.1029/129gm28.

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Kalma, S. J., P. J. Thorburn, and G. M. Dunn. "Using Heat Pulse and Deuterium Tracing Techniques to Estimate Tree Water Use." In Subsurface Hydrological Responses to Land Cover and Land Use Changes. Springer US, 1997. http://dx.doi.org/10.1007/978-1-4615-6141-5_4.

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DeJong, T. M. "The carbohydrate economy of fruit trees." In Concepts for understanding fruit trees. CABI, 2022. http://dx.doi.org/10.1079/9781800620865.0005.

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Abstract Since lack of water is a commonly occurring condition in nature, plants have developed many physiological responses to help them survive periods of water stress. Most of these responses cause changes in the carbohydrate economy of the tree through reduced photosynthesis, tree growth or cropping, but some of these effects can be managed to have minimal impact on overall tree productivity. Whether these responses influence economic production depends on: (i) the processes occurring at the time of a stress; (ii) how important these processes are to tree yield; and (iii) whether these processes rely heavily on the current level of photosynthesis or can use stored carbohydrates, like starch, to compensate for the lack of current photosynthesis in the leaves. This chapter discusses the carbohydrate economy of fruit trees. An outline is provided for how assimilates are distributed and used within a fruit or nut tree.
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Wullschleger, Stan D., and Paul J. Hanson. "Sensitivity of Sapling and Mature-Tree Water Use to Altered Precipitation Regimes." In Ecological Studies. Springer New York, 2003. http://dx.doi.org/10.1007/978-1-4613-0021-2_6.

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Conference papers on the topic "Tree water use"

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Gupta, Apurva, John Murray, Bin Li, Harish Mukundan, and Anis Hussain. "Use of a Stem Device for VIV Mitigation on a Dry Tree Semi-Submersible." In ASME 2009 28th International Conference on Ocean, Offshore and Arctic Engineering. ASMEDC, 2009. http://dx.doi.org/10.1115/omae2009-80010.

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The offshore industry is devoting considerable effort to develop a dry tree production Semi-submersible with motion characteristics similar to a Spar but with the functionality of a Tension Leg Platform (TLP) or a Semi-submersible in terms of fabrication, installation and commissioning. Installation of these Semi-submersibles in the Gulf of Mexico environment exposes the risers to high surface current which result in high fatigue damage due to Vortex Induced Vibration (VIV). In the existing dry tree production systems, the Spar shields the riser from the high velocity surface currents in depth
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Steen, Atle, Mike Tognarelli, Lixin Xu, and Hugh Banon. "Dry Tree Semisubmersible Options for Deepwater Production." In ASME 2002 21st International Conference on Offshore Mechanics and Arctic Engineering. ASMEDC, 2002. http://dx.doi.org/10.1115/omae2002-28619.

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Recent deep water field developments have made increasing use of dry tree completions from floating production units, principally spars and TLPs. There are a number of development efforts underway to include dry tree semi-submersibles in deep water. The use of dry tree semis requires some form of heave suppression as well as a means for limiting pitch motions. Two concepts using this principle include the DPS 2001 and the TPG 3300. Both of these concepts consist of a deck supported on columns and, in the case of the DPS-2001, pontoons. In each case there is a submerged heave plate to trap mass
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Murray, John J., Chan K. Yang, Cheng-Yo Chen, and Edwin Nah. "Two Dry Tree Semisubmersible Designs for Ultra Deep Water Post-Katrina Gulf of Mexico." In ASME 2008 27th International Conference on Offshore Mechanics and Arctic Engineering. ASMEDC, 2008. http://dx.doi.org/10.1115/omae2008-57462.

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The increased interest in floater designs for ultra-deep water has produced a number of dry tree semisubmersible designs that allow the use of top tensioned risers (TTRs). The primary advantage of the TTRs is that they facilitate direct vertical access to production wells and thereby offer access for well completions and interventions. The principle behind several of the dry tree semisubmersible designs is to reduce the motions of a traditional shaped semisubmersible to a level that can accommodate TTRs. This is accomplished by using heave plates that are positioned beneath the semisubmersible
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Kubo, Kotaro, Keita Fujiwara, Yoichi Tanaka, et al. "A Scoping Study on the Use of Direct Quantification of Fault Tree Using Monte Carlo Simulation in Seismic Probabilistic Risk Assessments." In 2022 29th International Conference on Nuclear Engineering. American Society of Mechanical Engineers, 2022. http://dx.doi.org/10.1115/icone29-88773.

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Abstract After the Fukushima Daiichi Nuclear Power Plant accident, the importance of conducting probabilistic risk assessments (PRAs) of external events, especially seismic activities and tsunamis, was recognized. The Japan Atomic Energy Agency has been developing a computational methodology for seismic PRA, called the direct quantification of fault tree using Monte Carlo simulation (DQFM). When appropriate correlation matrices are available for seismic responses and capacities of components, the DQFM makes it possible to consider the effect of correlated failures of components connected throu
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Mansour, Alaa M. "FHS Semi: A Semisubmersible Design for Dry Tree Applications." In ASME 2009 28th International Conference on Ocean, Offshore and Arctic Engineering. ASMEDC, 2009. http://dx.doi.org/10.1115/omae2009-79303.

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In this paper the performance of a new conceptual semisubmersible design that provides motion response similar to a Spar is investigated. The new invention introduces a new feature which is the Free-Hanging Solid Ballast Tank, hence the name FHS Semi. The use of the free-hanging Solid Ballast Tank (SBT) significantly increases the heave natural period while controlling the heave response in the wave frequency range and, therefore, enables the use of the FHS Semi in dry tree applications. The new design’s quayside integration technique and its interface with the top tensioned risers are present
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Lee, Ming-Yao, Jack Zeng, and Philip Poll. "The State of Dry-Tree Semi-Submersible Platforms for Deepwater Gulf of Mexico." In ASME 2014 33rd International Conference on Ocean, Offshore and Arctic Engineering. American Society of Mechanical Engineers, 2014. http://dx.doi.org/10.1115/omae2014-23236.

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The use of semi-submersible platforms has become increasingly popular due to its ability to carry large topsides and the possibility for quayside integration. With recent exploration successes in ultra-deepwater fields of the Gulf of Mexico, major oil and engineering companies are keen to look for a safe, reliable and cost-effective dry-tree option to maximize the value of deepwater field developments. Dry-tree semi-submersible (DTS) emerges as such an option to overcome the water depth and size limits imposed by TLP and Spar, respectively, and enables the platform to carry a large well array
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Srinivasan, Kumar, Z. J. Wang, Wei Yuan, and Richard Sun. "Vehicle Thermal Management Simulation Using a Rapid Omni-Tree Based Adaptive Cartesian Mesh Generation Methodology." In ASME 2004 Heat Transfer/Fluids Engineering Summer Conference. ASMEDC, 2004. http://dx.doi.org/10.1115/ht-fed2004-56748.

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CFD simulation of vehicle under-hood and under-body poses several challenges. Specifically, the complexity of the geometry involved makes the use of traditional mesh generation approaches, based on the boundary-to-interior methodology, impractical and time consuming. The current work presents the use of an interior-to-boundary method wherein the need for creating a ‘water-tight’ surface mesh is not a pre-requisite for volume mesh generation. The application of the new method is demonstrated for an actual passenger vehicle under-hood model with nearly a hundred components. Coupled radiation/con
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Martin, Bruce, Oriol Rijken, and Kent Davies. "Experimental Validation of a Numerical Model for a Dry-Tree Semisubmersible in Benign Environments." In ASME 2014 33rd International Conference on Ocean, Offshore and Arctic Engineering. American Society of Mechanical Engineers, 2014. http://dx.doi.org/10.1115/omae2014-24185.

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The offshore industry has spent the last several years developing semisubmersible platforms capable of supporting both drilling and production activities. The production trees are located on top of the top tensioned risers (TTRs) on a Dry Tree Semisubmersible. A key challenge in the design of these vessels is to reduce the heave motion as much as possible to enable the use of state-of-the-art riser tensioners. A model test campaign was executed as part of the developmental program. The primary objective of this campaign was to improve the accuracy of the numerical tools to be used in the desig
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Singh, Jasbindra, Mustafa Lawati, Abdulkareem Hindawi, et al. "Greening the Desert While Helping Business and Caring for the Environment." In Abu Dhabi International Petroleum Exhibition & Conference. SPE, 2021. http://dx.doi.org/10.2118/207307-ms.

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Abstract This paper describes the utilization of produced and treated formation water for planting trees and growing algae in large ponds; in a massive scale in South Oman. A detailed study has been carried out to assess the injection requirements for pressure maintenance in the producing reservoir and using the remaining excess pot-treated water for farming of the palm trees. The produced water has been used as disposal in formations deeper than the producing horizons in the past. The produced water was separated in a processing station that received gross production from a number of fields i
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Janoff, Dwight. "Flexible, High Temperature Thermal Insulation Materials for Subsea Wellhead and Production Equipment." In ASME 2002 21st International Conference on Offshore Mechanics and Arctic Engineering. ASMEDC, 2002. http://dx.doi.org/10.1115/omae2002-28392.

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As oil and gas wells are being drilled in deepwater, hydrate formation in the well has become a major concern. During a production shut down, gas hydrates can form and plug the bore of a subsea tree, tree piping, jumper, manifold and flow lines. During shut downs, hot produced fluids become stagnant and are cooled by the surrounding cold water, resulting in hydrate formation [1]. Thermal insulation is necessary to slow down this cooling process to prevent hydrate formation until the well production or hydrate inhibitor injection can be restored [2]. Currently available insulation materials for
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Reports on the topic "Tree water use"

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Cohen, Shabtai, Melvin Tyree, Amos Naor, Alan N. Lakso, Terence L. Robinson, and Yehezkiel Cohen. Influence of hydraulic properties of rootstocks and the rootstock-scion graft on water use and productivity of apple trees. United States Department of Agriculture, 2001. http://dx.doi.org/10.32747/2001.7587219.bard.

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This one year exploratory project investigated hydraulic architecture of apple dwarfing rootstocks. The hypothesis was that hydraulic conductance is correlated with rootstock vigor. A previous study of trees on three rootstocks in Israel showed that dwarfed trees used less water than un-dwarfed trees. Analysis showed that if the tree maintains leaf water potentials above minimum values, then this implies that the dwarfed trees have lower leaf conductance, which may also be the cause of dwarfing. The current project studied small 2-year old unworked rootstock trees, and full sized trees bearing
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Dasberg, Shmuel, Jan W. Hopmans, Larry J. Schwankl, and Dani Or. Drip Irrigation Management by TDR Monitoring of Soil Water and Solute Distribution. United States Department of Agriculture, 1993. http://dx.doi.org/10.32747/1993.7568095.bard.

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Drip irrigation has the potential of high water use efficiency, but actual water measurement is difficult because of the limited wetted volume. Two long-term experiments in orchards in Israel and in California and several field crop studies supported by this project have demonstrated the feasibility of precise monitoring of soil water distribution for drip irrigation in spite of the limited soil wetting. Time Domain Reflectometry (TDR) enables in situ measurement of soil water content of well defined small volumes. Several approaches were tried in monitoring the soil water balance in the field
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Hochmair, Hartwig, Adam Benjamin, Daniel Gann, Levente Juhasz, and Zhaohui Fu. Miami-Dade County Urban Tree Canopy Analysis. Florida International University, 2021. http://dx.doi.org/10.25148/gis.009116.

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This assessment focuses on describing urban tree canopy (UTC) within the Urban Development Boundary of Miami-Dade County, as defined by the Miami-Dade County Transportation Planning Organization (Figure 1). The area (intracoastal water areas excluded) encompasses approximately 1147 km2 (443 mi2). A combination of remote sensing and publicly available vector data was used to classify the following land cover classes: tree canopy/shrubs, grass, bare ground, wetland, water, building, street/railroad, other impervious surfaces, and cropland.
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Saltus, Christina, and Eric Britzke. Literature review : macrohabitat metrics to identify presence of chiroptera on the landscape in the United States. Engineer Research and Development Center (U.S.), 2022. http://dx.doi.org/10.21079/11681/45523.

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This special report reviews current scientific literature to identify the most commonly cited metrics used to describe the macrohabitat criteria important for Chiroptera presence in the United States. The review evaluates 69 scientific articles from 1994 to 2018. The most commonly cited metrics were divided into four main categories: tree-species-level metrics, landscape-level metrics, distance metrics, and topographic and atmospheric metrics. Of all metrics found, the top six most common metrics noted across all articles were percent canopy cover, diameter at breast height (DBH), forest type,
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Furman, Alex, Jan Hopmans, Shmuel Assouline, Jirka Simunek, and Jim Richards. Soil Environmental Effects on Root Growth and Uptake Dynamics for Irrigated Systems. United States Department of Agriculture, 2011. http://dx.doi.org/10.32747/2011.7592118.bard.

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Root water uptake is perhaps the most important unknown in the mass balance of hydrological and agricultural systems. The understanding and the ability to predict root uptake and the way it is influence by environmental conditions has great potential in increasing water and fertilizer use efficiency and allowing better control of water and contaminant leach towards groundwater. This BARD supported research is composed of several components, including a) intensive laboratory work for the quantification of root uptake and the way it is controlled by environmental conditions; b) development of to
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Bell, Gary, David Abraham, Gaurav Savant, and Anthony G. Emiren. Hydrodynamics in the Morganza Floodway and Atchafalaya Basin, report 3 : phase 3; a report for the US Army Corps of Engineers, MRG&P. Engineer Research and Development Center (U.S.), 2022. http://dx.doi.org/10.21079/11681/42800.

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The Morganza Floodway and the Atchafalaya Basin, located in Louisiana west of the Mississippi River, were evaluated using a two-dimensional Adaptive Hydraulics model. Prior to this study, Phase 1 and 2 model studies were performed that indicated that the existing floodway may not be able to pass the Project Design Flood discharge of 600,000 cubic feet per second due to levee overtopping. In this study, all elevations of exterior and interior levees were updated with current crest elevations. In addition, the Phase 3 effort evaluated the sensitivity of the floodway’s flow capacity to variations
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Dick, Warren, Yona Chen, and Maurice Watson. Improving nutrient availability in alkaline coal combustion by-products amended with composted animal manures. United States Department of Agriculture, 2002. http://dx.doi.org/10.32747/2002.7587240.bard.

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Hypothesis and Objectives: We hypothesized that coal combustion products (CCPs), including those created during scrubbing of sulfur dioxide from flue gases, can be used alone or mixed with composted animal manures as effective growth media for plants. Our specific objectives were, therefore, to (1) measure the chemical, physical and hydraulic properties of source materials and prepared mixes, (2) determine the optimum design mix of CCPs and composted animal manures for growth of plants, (3) evaluate the leachate water quality and plant uptake of selected elements from prepared mixes, (4) quant
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Dick, Warren, Yona Chen, and Maurice Watson. Improving nutrient availability in alkaline coal combustion by-products amended with composted animal manures. United States Department of Agriculture, 2006. http://dx.doi.org/10.32747/2006.7695883.bard.

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Hypothesis and Objectives: We hypothesized that coal combustion products (CCPs), including those created during scrubbing of sulfur dioxide from flue gases, can be used alone or mixed with composted animal manures as effective growth media for plants. Our specific objectives were, therefore, to (1) measure the chemical, physical and hydraulic properties of source materials and prepared mixes, (2) determine the optimum design mix of CCPs and composted animal manures for growth of plants, (3) evaluate the leachate water quality and plant uptake of selected elements from prepared mixes, (4) quant
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Mayfield, Colin. Capacity Development in the Water Sector: the case of Massive Open On-line Courses. United Nations University Institute for Water, Environment and Health, 2017. http://dx.doi.org/10.53328/mwud6984.

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The Sustainable Development Goal 6 targets are all dependent on capacity development as outlined in SDG 6a “Expand international cooperation and capacity-building support to developing countries in water- and sanitation related activities and programmes “. Massive Open On-line Courses (MOOCs) and distance learning in general have a significant role to play in this expansion. This report examines the role that MOOCs and similar courses could play in capacity development in the water sector. The appearance of MOOCs in 2010/11 led within 4 years to a huge increase in this type of course and in st
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Hovav, Ran, Peggy Ozias-Akins, and Scott A. Jackson. The genetics of pod-filling in peanut under water-limiting conditions. United States Department of Agriculture, 2012. http://dx.doi.org/10.32747/2012.7597923.bard.

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Pod-filling, an important yield-determining stage is strongly influenced by water stress. This is particularly true for peanut (Arachishypogaea), wherein pods are developed underground and are directly affected by the water condition. Pod-filling in peanut has a significant genetic component as well, since genotypes are considerably varied in their pod-fill (PF) and seed-fill (SF) potential. The goals of this research were to: Examine the effects of genotype, irrigation, and genotype X irrigation on PF and SF. Detect global changes in mRNA and metabolites levels that accompany PF and SF. Explo
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