Готові списки джерел за темами / Sustained yield

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Добірка наукової літератури з теми "Sustained yield"

Автор: Grafiati

Опубліковано: 3 червня 2025

Оновлено: 31 липня 2025

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Статті в журналах з теми "Sustained yield"

Rothschild, Brian J., and Yue Jiao. "Comparison Between Maximum Sustained Yield Proxies and Maximum Sustained Yield." Open Fish Science Journal 6, no. 1 (2013): 1–9. http://dx.doi.org/10.2174/1874401x01306010001.

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Attaining maximum sustained yield (MSY) is a central goal in U.S. fisheries management. To attain MSY, fishing mortality is maintained at FMSY and biomass at BMSY. Replacing FMSY and BMSY by “proxies” for FMSY and BMSY is commonplace. However, these proxies are not equivalent to FMSY and BMSY. The lack of equivalency is an important issue with regard to whether MSY is attained or whether biomass production is wasted. In this paper we study the magnitude of the equivalency. We compare FMSY/BMSY (calculated using the ASPIC toolbox) with the proxy estimates, F40%/B40%, published in GARM III. Our

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McDougall, F. W. "Sustained Yield in Alberta." Forestry Chronicle 66, no. 1 (1990): 14–19. http://dx.doi.org/10.5558/tfc66014-1.

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The concept of sustained yield is examined with particular reference to the sustained yield concept as it is required to be applied by Alberta law and through the requirements of the regulations, timber quota certificates and forest management agreements. The adequacy of the sustained yield vision in Alberta is discussed. Actual forest management practices are examined in the light of the Alberta requirements. Some shortcomings are noted, and a number of serious problems are described. However, the author concludes that a dedicated and successful effort is being made, and the most important pr

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Pecore, Marshall. "Menominee Sustained-Yield Management." Journal of Forestry 90, no. 7 (1992): 12–16. http://dx.doi.org/10.1093/jof/90.7.12.

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Schallau, Con H. "Sustained Yield versus Community Stability." Journal of Forestry 87, no. 9 (1989): 16–23. http://dx.doi.org/10.1093/jof/87.9.16.

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Walker, John L. "Traditional Sustained Yield Management: Problems and Alternatives." Forestry Chronicle 66, no. 1 (1990): 20–24. http://dx.doi.org/10.5558/tfc66020-1.

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Sustained yield has been a tenet of faith among foresters since forestry emerged as a profession. The concept developed during feudal times when foresters were primarily gamekeepers for landed aristocracy. When the industrial revolution put new demands on forests for fuelwood, foresters extended their "bag limits" to the trees, based on the perception that unregulated markets would result in forest devastation. Early foresters believed that governments must own or regulate forests to perpetuate timber resources. This belief is the basis for extensive public forests today in Canada, the United

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Baskerville, G. L. "Canadian Sustained Yield Management — Expectations and Realities." Forestry Chronicle 66, no. 1 (1990): 25–28. http://dx.doi.org/10.5558/tfc66025-1.

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There are gaps between expectations and realities with respect to sustainability in the forests of Canada. While all forestry agencies have a policy of sustained yield, there is public confusion over what is being sustained, on what area, and for what period of time. Given the scale of forestry in Canada, and the fact of predominantly public ownership of the forest, this is a dangerous situation. At present, the claims of professional managers that sustainability is a reality in the forests do not enjoy public acceptance.There is a tendency, both in the profession and among the public, to spea

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Alexander, Thomas G., and Harold K. Steen. "History of Sustained-Yield Forestry: A Symposium." Western Historical Quarterly 16, no. 2 (1985): 220. http://dx.doi.org/10.2307/969696.

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Jenks, Jonathan A., Winston P. Smith, and Christopher S. DePerno. "Maximum Sustained Yield Harvest versus Trophy Management." Journal of Wildlife Management 66, no. 2 (2002): 528. http://dx.doi.org/10.2307/3803186.

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Clary, David A. "What Price Sustained Yield? The Forest Service, Community Stability, and Timber Monopoly Under the 1944 Sustained-Yield Act." Forest & Conservation History 31, no. 1 (1987): 4–18. http://dx.doi.org/10.2307/4004837.

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Daust, David K., and John D. Nelson. "Spatial Reduction Factors for Strata-Based Harvest Schedules." Forest Science 39, no. 1 (1993): 152–65. http://dx.doi.org/10.1093/forestscience/39.1.152.

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Abstract The impact of block size and exclusion period on sustained yield predictions is examined for 27 hypothetical forests; forests are delineated by species, site and rotation age. Long-range harvest schedules are developed for the forests using (1) aspatial, strata-based formulations solved with linear programming, and (2) spatial, block scheduling formulations solved with Monte Carlo Integer Programming. The sustained yields estimated by the spatial formulations are in all cases lower (range: 2% to 29%) than those estimated by the aspatial formulations. The magnitude of the reduction in

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Дисертації з теми "Sustained yield"

Kumar, P. J. Dilip. "Cost benefit analysis and sustained yield forestry in India." Thesis, Bangor University, 1988. https://research.bangor.ac.uk/portal/en/theses/cost-benefit-analysis-and-sustained-yield-forestry-in-india(89085b04-580f-4da9-a222-33c636cfc4b6).html.

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The basis of scientific forest management in India has been the principle of maximum physical sustained yield of timber and other highvalued products in the interest of posterity. This leads to long rotations, slow turnover of the crop, and slow conversion of existing forest into more productive crops. The needs of the local population have generally been given a lower priority. The community is thus often not in sympathy with the forest departments. This makes the job of protecting and managing the forests as envisaged more difficult. It would therefore be desirable to compare the relative me

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Pollisco, Roy Roberto Arnoco 1962. "Management of pinyon-juniper woodlands for the sustained yield of wood and water." Thesis, The University of Arizona, 1987. http://hdl.handle.net/10150/191940.

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The growing awareness on the importance of pinyon-juniper woodlands has greatly influenced the conduct of this study. The main objectives of this study were to develop stand, basal area, and stock tables, to relate tree growths to patterns of water yield, and to outline forest management strategies for the continuous and sustained production of wood and water. The tree inventory data were gathered using the point-sampling method in 1965 and 1986. Precipitation and runoff data were provided by the U.S. Department of Agriculture Forest Service. It was found that streamflow on the study watershed

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Takahashi, Shu. "Comparison of Optimization Methodologies for Sustained-Yield Groundwater Pumping Planning in East Shore Area, Utah." DigitalCommons@USU, 1992. https://digitalcommons.usu.edu/etd/4244.

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Combined simulation and optimization models, which are helpful for long-term groundwater planning of complex nonlinear aquifer systems, are developed using alternative modelling approaches. The models incorporate a representation of steady-state, quasi-three-dimensional head response to pumping within an optimization . An embedding model which describes exactly the nonlinear flow of an unconfined aquifer is presented. In contrast with the embedding models presented in the Utah State University Ground Water Model, it directly achieves the optimal solution without a "cycling." To address the non

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Hirt, Paul Wayne. "A conspiracy of optimism: Sustained yield, multiple use, and intensive management on the national forests, 1945-1991." Diss., The University of Arizona, 1991. http://hdl.handle.net/10150/185680.

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This is a historical study of the intersection of political economy with natural resources management, as played out on the national forests between 1945-1991. Specifically, it focuses on two core national forest management policies; sustained yield and multiple use. These two policy directives represent an attempt by the public and elected officials to apply principles of sustainable development to publicly-owned forest lands, and to ensure that a wide variety of both market and nonmarket forest values are preserved for the benefit of present and future generations. Interest groups, the Fores

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Gassama, Ibrahima. "Du rendement soutenu à l'aménagement forestier durable : Quelle gouvernance pour le Québec ?" Thesis, Université Paris-Saclay (ComUE), 2016. http://www.theses.fr/2016SACLV063/document.

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Cette thèse est une exploration pour rendre opérationnel le concept d'aménagement forestier durable, en dépassant les perspectives proposées par le rendement soutenu. Dans ce cadre, la démarche n'est pas de calculer l'évolution de la production des volumes de bois pour en garantir un flux constant, mais bien la définition, par la diversité des acteurs, de la cohérence dans le développement d'une diversité d'activités forestières. Cette démarche nécessite non seulement un éclairage associé à la connaissance experte, mais aussi à la connaissance provenant des acteurs des activités forestières et

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Njanike, Joseph Tendayi. "Investigations to determine the long-term sustainable yield of the Karoo aquifer and the sustained availability of groundwater for small-scale irrigation projects, in Dendera area, Kwekwe District - Zimbabwe." Thesis, Rhodes University, 2001. http://hdl.handle.net/10962/d1020853.

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In this thesis the long-term sustainable yield of the Karoo sediment aquifer unit occurring in Dendera area of Kwekwe District is investigated, with the object of providing quantitative data on the sustained availability of groundwater for small-scale irrigation projects. Archaean Basement Schists and Pre-Cambrian gneissic granites, the Basement Complex rocks, underlie the entire study area. Overlying these are Upper Karoo sediments. Aeolian Kalahari sands unconformably mantle higher interfluves, while redistributed sands occur along valleys of major rivers and streams. The Karoo sediments, wh

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Piller, GJ. "Sustained yield in Tasmanian forest management: An examination of the conflicts between sustained yield management and the provision of non-wood values." Thesis, 1986. https://eprints.utas.edu.au/15874/1/Pillar-front.pdf.

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The traditional principles of sustained yield have long been relied upon in the planning of forestry management. Along with the more recently introduced concept of multiple-use , sustained yield remains the catchcry of forest managers. The principles of sustained yield concentrate on planning the extent and timing of harvesting for wood production objectives. However, in the transition from forestry management to forest management, these principles, with their heavy emphasis on wood production objectives, have been at variance with the multiple use concept in a number of ways. This stu

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Rouck, Kerry Brian. "Applications of spatially explicit timber harvest scheduling : sustained yield unit size and corridor analysis." Thesis, 1995. http://hdl.handle.net/2429/3869.

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This thesis addresses two major topics. First, impacts on timber supply and economics associated with sustained yield unit size are investigated. Partitioning the forest into sustained yield units is a complex task that involves assessing timber supply, allocation of cutting rights, and social, economic, and environmental impacts. There are numerous ways to vary the timing and intensity of harvests within individual drainages while still meeting the objectives of sustained yield. In this paper a spatial forest planning model is used to examine economic and environmental implications of v

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Smith, Stephen Robert. "A study of the dynamics of developing sustained church planting movements in Asian nations, based on lessons learned in the 2004-2005 NEXT conferences in East Asia." Thesis, 2007. http://hdl.handle.net/10500/2404.

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This study attempts to be an exhaustive analysis of the dynamics of developing sustained church planting movements in Asian nations, based on lessons learned in the 2004-2005 NEXT conferences in East Asia. Principles are being discovered and methodologies developed in East Asia on how to build sustained church planting movements around the world. To understand these, consolidate learning, and apply that learning in a variety of crosscultural ministry contexts, a series of conferences were hosted by my wife and myself. Eight week-long ”NEXT conferences” were held, consisting of sixty expe

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Книги з теми "Sustained yield"

Coghill, John B. Sustained yield: Alaska's constitutional mandate for action. Office of the Lieutenant Governor, 1994.

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California. Legislature. Senate. Select Committee on Forest Resources. Sustained yield forest policy: Wednesday, October 28, 1987, transcript of proceedings. Joint Publications, 1987.

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Coggins, Lewis G. Effects of sample size and ageing error on estimates of sustained yield. State of Alaska, Dept. of Fish and Game, 1997.

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Beuter, John H. Lakeview Federal Sustained Yield Unit, Fremont National Forest: A review, 1980-1989. Mason, Bruce & Girard, 1990.

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United States. Bureau of Land Management, ed. O&C Sustained Yield Act: The land, the law, the legacy, 1937-1987. U.S. Dept. of the Interior, Bureau of Land Management, 1987.

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Schallau, Con H. Are federal sustained yield units equitable?: A case study of the Grays Harbor Unit. U.S. Dept. of Agriculture, Forest Service, Pacific Northwest Forest Research Station, 1986.

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Library of Congress. Congressional Research Service, ed. Multiple use, sustained yield and other philosophies of federal land management: A selected bibliography. Congressional Research Service, Library of Congress, 1992.

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Schallau, Con H. Are federal sustained yield units equitable?: A case study of the Grays Harbor Unit. U.S. Dept. of Agriculture, Forest Service, Pacific Northwest Research Station, 1986.

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Schwartz, Charles C. Cumulative effects model verification, sustained yield estimation, and population viability management of the Kenai Peninsula, Alaska brown bear. Alaska Department of Fish and Game, Division of Wildlife Conservation, 1997.

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Schwartz, Charles C. Cumulative effects model verification, sustained yield estimation, and population viability management of the Kenai Peninsula, Alaska brown bear. Alaska Dept. of Fish and Game, Division of Wildlife Conservation, 1999.

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Частини книг з теми "Sustained yield"

Dye, P. J., and J. M. Bosch. "Sustained water yield in afforested catchments — the South African experience." In Sustainable Forest Management. Springer Netherlands, 2000. http://dx.doi.org/10.1007/978-94-010-9819-9_3.

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Osmaston, F. C. "Sustained Yields." In The Management of Forests. Routledge, 2024. http://dx.doi.org/10.4324/9781003481270-3.

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Hong, Yihong. "Experimental Study of Reinforced Concrete Beams Strengthened with CFRP." In Lecture Notes in Civil Engineering. Springer Singapore, 2022. http://dx.doi.org/10.1007/978-981-19-1260-3_10.

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AbstractTo test the strengthening effect of CFRP sheets on reinforced concrete (RC) beams, an experimental study was performed on five RC beams to analyze the influence of the amount of CFRP sheets and the sustained load of RC beams on the strengthening effect. The results showed that CFRP sheets could significantly improve the bending bearing capacity of the beams. However, there was no linear relationship between the amount of CFRP sheets and the strengthening effect, and the load on the beams had a great impact on the rigidity of the beams in the yield stage.

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Raedeke, Kenneth J. "Population Dynamics and Estimation of Maximum Sustained Yield (MSY) in a Black-Tailed Deer Population." In The Biology of Deer. Springer New York, 1992. http://dx.doi.org/10.1007/978-1-4612-2782-3_24.

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Kreuze, Jan, Wilmer J. Cuellar, and Jan W. Low. "Challenge of Virus Disease Threats to Ensuring Sustained Uptake of Vitamin-A-Rich Sweetpotato in Africa." In Plant Diseases and Food Security in the 21st Century. Springer International Publishing, 2021. http://dx.doi.org/10.1007/978-3-030-57899-2_5.

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AbstractOrange-fleshed sweetpotatoes (OFSP) are a rich source of pro-vitamin A and can alleviate vitamin A deficiency in the developing world. In Africa, traditional varieties have been almost exclusively white-fleshed and introduction and breeding of orange-fleshed varieties into Africa has been severely hampered by virus diseases to which many varieties are susceptible. Breeding progress to generate resistant varieties has been slow due to rare and recessive occurrence of resistance in breeding populations. Production of virus-free seed is complicated by the fact that most sweetpotato viruse

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Jamaloddin, Mohammed, Anumalla Mahender, C. Guru Gokulan, et al. "Molecular Approaches for Disease Resistance in Rice." In Rice Improvement. Springer International Publishing, 2021. http://dx.doi.org/10.1007/978-3-030-66530-2_10.

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AbstractRice production needs to be sustained in the coming decades, with changing climatic conditions becoming more conducive to the prevalence of disease outbreaks. Major rice diseases collectively cause enormous economic damage and yield instability. Breeding for disease-resistant rice varieties could be one of the best options to counter these disease outbreaks. Disease-screening protocols and newer technologies are essential for effective phenotyping and would aid in gene discovery and function. Understanding the genetics of disease mechanisms and stacking of broad-spectrum disease-resist

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Owoade, Folasade Mary, Samuel Godfried Kwasi Adiku, Christopher John Atkinson, and Dilys Sefakor MacCarthy. "Differential Impact of Land Use Types on Soil Productivity Components in Two Agro-ecological Zones of Southern Ghana." In African Handbook of Climate Change Adaptation. Springer International Publishing, 2021. http://dx.doi.org/10.1007/978-3-030-45106-6_144.

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AbstractThe maintenance of soil productivity is important for sustained crop yield in low-input systems in the tropics. This study investigated the impact of four different land use types, namely, maize and cassava cropping, woodlot/plantations, and natural forests on soil productivity components, especially soil carbon accretion, at six sites within two agro-ecological zones of southern Ghana. Soil properties were significantly different between sites and ecological zones. The coastal savanna zones, which is a low rainfall zone had relatively lower soil carbon storage than the high rainfall f

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Stenner, A. Jackson, William P. Fisher, Mark H. Stone, and Donald Burdick. "Causal Rasch Models." In Explanatory Models, Unit Standards, and Personalized Learning in Educational Measurement. Springer Nature Singapore, 2022. http://dx.doi.org/10.1007/978-981-19-3747-7_18.

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AbstractRasch’s unidimensional models for measurement show how to connect object measures (e.g., reader abilities), measurement mechanisms (e.g., machine-generated cloze reading items), and observational outcomes (e.g., counts correct on reading instruments). Substantive theory shows what interventions or manipulations to the measurement mechanism can be traded off against a change to the object measure to hold the observed outcome constant. A Rasch model integrated with a substantive theory dictates the form and substance of permissible interventions. Rasch analysis, absent construct theory a

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Steiner-Khamsi, Gita. "Reception and Translation into the Local Context: The Timing, Lifespan, and Age of Reforms." In Time in Education Policy Transfer. Springer Nature Switzerland, 2025. https://doi.org/10.1007/978-3-031-82524-8_4.

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Abstract This chapter introduces three temporalities—timing, lifespan, and age—that capture the various trajectories of SAWA adoption and translation at both the national and local levels. The multiple streams framework, theories that explain reform intensity shortly before and after a change in administration, and the externalization thesis are well-known interpretive frameworks that help explain the timing of policy borrowing. In contrast, further research is needed on why some reforms are short-lived while others are sustained and institutionalized. Policy analyses that determine the winner

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Colleta-Filho, H. della, and Siu Mui Tsai. "Biological Nitrogen Fixation Can Sustain Yield in Phaseolus vulgaris L." In Nitrogen Fixation: From Molecules to Crop Productivity. Springer Netherlands, 2002. http://dx.doi.org/10.1007/0-306-47615-0_177.

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Тези доповідей конференцій з теми "Sustained yield"

Pavinich, W. A., L. C. Rinaca, P. V. Guthrie, and D. M. Hewette. "Mechanical Properties of Stainless Steel Weldments Degraded by MIC." In CORROSION 1990. NACE International, 1990. https://doi.org/10.5006/c1990-90531.

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Abstract Four-point bend testing of microbiologically induced corrosion (MIC) damaged piping was conducted to assess the effect of MIC defects on structural integrity and the possibility of opening a MIC pit during a seismic event. The tests were performed on specimens fabricated from the Sequoyah Nuclear Plant Emergency Raw Water Cooling (ERCW) System 6-inch, schedule 40 piping, 316 stainless steel butt welds that were MIC-damaged during operation, and the one undamaged butt weld. No enhanced water leakage was observed until well beyond the yield point at loads approximately four times the ma

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Schutz, R. W., G. Clapp, B. Mekha, and M. Peet. "Resistance of UNS R56404 Titanium to Mercury Liquid Metal Embrittlement." In CORROSION 2016. NACE International, 2016. https://doi.org/10.5006/c2016-07556.

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Abstract Liquid mercury can be a natural component of natural gas, condensate, and crude oil production streams, so the potential for liquid metal embrittlement (LME) of hydrocarbon production metallic components must be considered. With increasing use of titanium alloys for deep sour high pressure/high temperature well oil country tubular goods (OCTG) and dynamic offshore riser components, titanium’s ability to resist degradation from liquid mercury contact warranted assessment under relevant hydrocarbon production conditions. The results of exposing UNS R56404 forging and pipe product forms

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Ning, Jing, Ramesh Rao, Peter F. Ellis, and Brent Sherar. "Evaluation of Girth-Welded 22Cr Duplex Stainless Steel Piping for Susceptibility to Environmentally Assisted Cracking (EAC), Pitting, and General Corrosion in a Sour Environment." In CORROSION 2021. AMPP, 2021. https://doi.org/10.5006/c2021-16725.

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Abstract The results of a stress corrosion cracking (SCC) qualification study of twenty-four heats of girth-welded 22Cr duplex stainless steel (DSS) piping are reported. This study evaluated the performance of either triplicate welded ANSI/NACE TM0177-2016 Method A tensile specimens or triplicate welded NACE TM0316-2016-compliant four-point-bend-beam (FPBB) specimens per heat exposed to a sour environment at 90 °C. All environmentally assisted cracking (EAC) specimens were stressed to an equivalent of 90% of their respective 0.2%-offset yield strengths at 90 °C to assess SCC susceptibility. In

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Si, Chunyan, Yee Van Fan, Monika Dokl, Lidija Cucek, Zdravko Kravanja, and Petar Sabev Varbanov. "Enhancing Consumer Engagement in Plastic Waste Reduction: A Stackelberg Game." In The 35th European Symposium on Computer Aided Process Engineering. PSE Press, 2025. https://doi.org/10.69997/sct.190355.

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Circular economy is recognized as one of the most effective strategies for promoting plastic sustainability. However, its implementation requires to enhance consumer engagement, which remains a primary target of regulatory initiatives designed to promote plastic circular economy. To ensure sustained consumer participation, it is essential to evaluate and optimize various incentives, including regulatory policies, voluntary programs, and market-related mechanisms. This study applies Stackelberg Game Approach to quantitatively capture the strategic interactions between the authorities (as the le

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Urband, Bruce E., Khlefa A. Esaklul, and John Martin. "The Production and Fit-for-Service Testing and Field Useage of C-110." In CORROSION 2004. NACE International, 2004. https://doi.org/10.5006/c2004-04109.

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The use of sour service tubulars has come a long way since the sour service casing and tubing grades C90 and T95 were first standardized by the American Petroleum Institute (API)1. As the search for oil and gas reservoirs is expanding, it is becoming common practice to drill and produce from formations at depths in excess of 20,000 feet. In deep offshore wells, water depths of 10,000 feet are an every day phenomena. Significant colder seawater temperature resulting from the water depth, further promotes the deleterious attack of hydrogen. At these deeper formation depths, high formation pressu

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Urband, Bruce E., Khlefa A. Esaklul, and John Martin. "The Production and Fit-For-Service Testing and Field Useage of C-110." In CORROSION 2004. NACE International, 2004. https://doi.org/10.5006/c2004-04409.

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Piette, Michel, Florian Thebault, Livia-Raquel Cupertino-Malheiros, and John Fortaillier. "Design of Sour Service Material Metallurgy by the Combination of Advanced Techniques." In CONFERENCE 2022. AMPP, 2022. https://doi.org/10.5006/c2022-17615.

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Abstract The needs of oil and gas operators are challenging the industry to push the limits in sour service materials always further by finding the best compromise between high strength steels and good resistance to Sulphide Stress Cracking (SSC). It is in this context that materials have been recently developed, so as to respond to increasingly severe service with high level of Specified Minimum Yield Strength (SMYS). This communication presents the combination of computational modeling methods, advanced metallurgical characterization techniques, scale-up methods (from laboratory to mass prod

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AHRABOUS, Mhamed, Khalil ALLALI, Aziz FADLAOUI, and Fatima ARIB. "RESILIENCE OF AGRICULTURAL FARMS IN THE FACE OF CLIMATE CHANGE: THE CASE OF THE TODGHA OASIS, MOROCCO." In 24th SGEM International Multidisciplinary Scientific GeoConference 2024. STEF92 Technology, 2024. https://doi.org/10.5593/sgem2024v/4.2/s19.45.

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This study investigates the adaptive strategies of farmers in the Todgha oasis, Morocco, as they respond to the pressing challenges of climate change. Through a mixed-methods approach, we assess the resilience mechanisms adopted to sustain agricultural production amidst increasing temperatures, unpredictable rainfall, and shifting ecological conditions. Key findings reveal that farmers rely heavily on traditional water management systems, including khettaras and modern pump-assisted irrigation, to mitigate water scarcity. Additionally, the oasis�s date palm cultivation forms a microclimate tha

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Marjanovic Jeromela, Ana, Federica Zanetti, Johann Vollmann, et al. "COMPARISON OF CAMELINA SEED YIELD AND BIOMASS PRODUCTION IN CONTRASTING ENVIRONMENTS." In XXVI savetovanje o biotehnologiji sa međunarodnim učešćem. Agronomski fakultet Univerziteta u Kragujevcu, 2021. http://dx.doi.org/10.46793/sbt26.019mj.

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The most of the research work on camelina has been carried out in northern America and continental Europe. Two breeding groups (IFVCNS and BOKU) and one group focusing on the agronomy (DISTAL) just recently started research activities focusing on the development of new genotypes more adapted for southern regions of Europe. Common field trials, with 2 camelina lines selected by IFVCNS and 6 lines selected by BOKU were established at Bologna, Italy and at Rimski Šančevi, Serbia. Newly developed camelina lines were found to be highly adapted to Bologna environment, being able to achieve sustained

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Frolov, Michail P., Gordon D. Hager, Andrei A. Ionin, et al. "Electric properties, spectroscopy, and singlet delta oxygen yield of electron-beam sustained discharge in oxygen gas mixtures." In Lasers and Applications in Science and Engineering, edited by Steven J. Davis and Michael C. Heaven. SPIE, 2004. http://dx.doi.org/10.1117/12.525715.

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Звіти організацій з теми "Sustained yield"

Schallau, Con H., and Wilbur R. Maki. Are federal sustained yield units equitable? A case study of the Grays Harbor unit. U.S. Department of Agriculture, Forest Service, Pacific Northwest Research Station, 1986. http://dx.doi.org/10.2737/pnw-rp-369.

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Blum, Abraham, and Henry T. Nguyen. Molecular Tagging of Drought Resistance in Wheat: Osmotic Adjustment and Plant Productivity. United States Department of Agriculture, 2002. http://dx.doi.org/10.32747/2002.7580672.bard.

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Drought stress is a major limitation to bread wheat (Triticumaestivum L.) productivity and its yield stability in arid and semi-arid regions of world including parts of Israel and the U.S. Currently, breeding for sustained yields under drought stress is totally dependent on the use of yield and several key physiological attributes as selection indices. The attempt to identify the optimal genotype by evaluating the phenotype is undermining progress in such breeding programs. Osmotic adjustment (OA) is an effective drought resistance mechanism in many crop plants. Evidence exists that there is a

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Dumas, Patrice, Stefan Wirsenius, Tim Searchinger, Nadine Andrieu, and Adrien Vogt-Schilb. Options to achieve net-zero emissions from agriculture and land use changes in Latin America and the Caribbean. Inter-American Development Bank, 2022. http://dx.doi.org/10.18235/0004427.

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Eleven countries in Latin America and the Caribbean have pledged to reach net-zero emissions by around 2050. Changes in the food system are key to reach these carbon neutrality goals, as agriculture and resulting land-use changes are responsible for almost half of greenhouse gas emissions in the region. We quantify the effect of supply-side (e.g., yield improvements, silvopasture, agroforestry) and demand-side (e.g., reduction of waste and losses, changing diets) options to reduce emissions and transform the land use system in a net carbon sink by 2050 while improving nutrition for the growing

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Leis, Brian, and Tom McGaughy. PR-185-163731-R01 Time-delayed Failure in X65 Moderate-toughness Line-pipes. Pipeline Research Council International, Inc. (PRCI), 2018. http://dx.doi.org/10.55274/r0011483.

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A gouge, or a dent and gouge in pipelines can fail at a constant pressure after some period of time has elapsed, and is commonly referred to as a time-delayed failure. Such behavior has been observed both in the laboratory and in the field. Older pipelines are more likely to fail during or immediately after damage due to limited toughness. Tougher modern pipelines can survive significant damage and can be susceptible to stable tearing upon re-rounding of the damaged pipe. Under certain circumstances, this combination of factors has the potential to promote delayed failure over a period of time

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Elsby, Michael W. L., Axel Gottfries, Pawel M. Krolikowski, and Gary Solon. Wage adjustment in efficient long-term employment relationships. Federal Reserve Bank of Cleveland, 2023. http://dx.doi.org/10.26509/frbc-wp-202323.

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We present a model in which efficient long-term employment relationships are sustained by wage adjustments prompted by shocks to idiosyncratic productivity and the arrival of outside job offers. In accordance with casual and formal evidence, these wage adjustments occur only sporadically, due to the presence of renegotiation costs. The model is amenable to analytical solution and yields new insights into a number of labor market phenomena, including: (1) key features of the empirical distributions of changes in pay among job stayers; (2) a property of near-“memorylessness” in wage dynamics tha

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Litaor, Iggy, James Ippolito, Iris Zohar, and Michael Massey. Phosphorus capture recycling and utilization for sustainable agriculture using Al/organic composite water treatment residuals. United States Department of Agriculture, 2015. http://dx.doi.org/10.32747/2015.7600037.bard.

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Objectives: 1) develop a thorough understanding of the sorption mechanisms of Pi and Po onto the Al/O- WTR; 2) determine the breakthrough range of the composite Al/O-WTR during P capturing from agro- wastewaters; and 3) critically evaluate the performance of the composite Al/O-WTR as a fertilizer using selected plants grown in lysimeters and test-field studies. Instead of lysimeters we used pots (Israel) and one- liter cone-tainers (USA). We conducted one field study but in spite of major pretreatments the soils still exhibited high enough P from previous experiments so no differences between

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Abasse, Tougiani, Moussa Massaoudou, Habou Ribiou, Soumana Idrissa, and Dan Guimbo Iro. Farmer managed natural regeneration in Niger: the state of knowledge. Tropenbos International, 2023. http://dx.doi.org/10.55515/byiz5081.

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Faced with environmental degradation and strong land pressure, farmers in south-central Niger have intensified their agricultural production systems. Since the 1980s, farmers in the regions of Zinder, Maradi and Tahoua have increased the number of trees and shrubs on their fields, creating new agroforestry parklands over about 5 million hectares. This regreening is not based on tree planting, however, but on farmers protecting and managing natural regeneration of woody species on their crop lands. This has been well documented over the years, but until now, there has not been a thorough review

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Yahav, Shlomo, John Brake, and Orna Halevy. Pre-natal Epigenetic Adaptation to Improve Thermotolerance Acquisition and Performance of Fast-growing Meat-type Chickens. United States Department of Agriculture, 2009. http://dx.doi.org/10.32747/2009.7592120.bard.

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: The necessity to improve broiler thermotolerance and performance led to the following hypothesis: (a) thethermoregulatory-response threshold for heat production can be altered by thermal manipulation (TM) during incubation so as to improve the acquisition of thermotolerance in the post-hatch broiler;and (b) TM during embryogenesis will improve myoblast proliferation during the embryonic and post-hatch periods with subsequent enhanced muscle growth and meat production. The original objectives of this study were as follow: 1. to assess the timing, temperature, duration, and turning frequency r

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Chutimaworapan, Suchada, Chaiyo Chaichantippayuth, and Areerat Laopaksa. Formulation of pharmaceutical products of Garcinia mangostana Linn. extracts. Chulalongkorn University, 2006. https://doi.org/10.58837/chula.res.2006.32.

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Part I: The purpose of the investigation was to develop the extraction process that was simple, practical and giving high yield. The maceration of dried powder of Garcinia mangostana fruit husk with ethyl acetate gave yellow crystalline powder of mangostin. The yield was calculated as 7.47%. The identification of the Garcinia mangostanahusk extract was carried out by thin-layer chromatography (TLC) and differential scanning calorimetry. The TLC of mangostin was done by using the alumina sheet and ethyl acetate: hexane (3:1) as mobile phase. The Rf value as compared with standard mangostin was

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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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