Relevant bibliographies by topics / Harvest planning

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  1. Journal articles
  2. Dissertations / Theses
  3. Books
  4. Book chapters
  5. Conference papers

Academic literature on the topic 'Harvest planning'

Author: Grafiati
Published: 4 June 2021
Last updated: 12 February 2022

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Journal articles on the topic "Harvest planning"

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Zion, B., M. Mann, D. Levin, A. Shilo, D. Rubinstein, and I. Shmulevich. "Harvest-order planning for a multiarm robotic harvester." Computers and Electronics in Agriculture 103 (April 2014): 75–81. http://dx.doi.org/10.1016/j.compag.2014.02.008.

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Feijó, Sandra, Lindolfo Storck, Alessandro Dal'Col Lúcio, Sidinei José Lopes, Danton C. Garcia, and Ricardo H. Carpes. "Heterogeneity index of zucchini yield on a protected environment and experimental planning." Horticultura Brasileira 26, no. 1 (March 2008): 35–39. http://dx.doi.org/10.1590/s0102-05362008000100007.

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The objectives of this work were to assess zucchini heterogeneity index and fruit weight at different harvest frequencies for plants grown on a protected environment; to estimate the optimum plot size; and to determine the least significant difference among treatments, varying plot size and replication number. Plants of cultivar Caserta were grown in a plastic greenhouse, using spaces of 0.80 x 1.00 among plants and lines, respectively. The following harvest frequencies were studied: fruits harvested daily, (1) at 10:00, (2) at 10:00 and 18:00, (3) at 8:00, 10:00, 12:00, 14:00, 16:00 and 18:00 h and; (4) fruits harvested every other day, at 18:00 h. Twenty-seven harvests were carried out, collecting fruits larger than 0.15 m. Plots were planned with 1, 2, 3, and 6 plants per row. Heterogeneity index was estimated according to Smith's method and, the optimum plot size, according to modified maximum curvature method. Fruit yield per plant gradually increased reaching a maximum at the 15th harvest. Total yield was of 3214, 3124, 3928 and 3248 g plant¹, respectively, at the harvest frequencies 1, 2, 3 and 4, with no significant differences among them. The heterogeneity index in the plastic greenhouse was nearly zero. The use of smaller plots combined with a larger number of replications increased the experimental accuracy. Although optimum plot size to assess total fruit yield varied between one and seven plants, depending on the harvest frequency, plots with three plants per row plots, with six replications, were the most appropriate design, allowing detecting a least significant difference among treatments equal to 76% of the mean.
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Karlsson, J., M. Ronnqvist, and J. Bergstrom. "Short-term harvest planning including scheduling of harvest crews." International Transactions in Operational Research 10, no. 5 (September 2003): 413–31. http://dx.doi.org/10.1111/1475-3995.00419.

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Everaarts, A. P. "HARVEST PLANNING OF BRUSSELS SPROUTS." Acta Horticulturae, no. 371 (July 1994): 135–44. http://dx.doi.org/10.17660/actahortic.1994.371.16.

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Bustos, Oscar, Andrew Egan, and Warren Hedstrom. "A Comparison of Residual Stand Damage along Yarding Trails in a Group Selection Harvest Using Four Different Yarding Methods." Northern Journal of Applied Forestry 27, no. 2 (June 1, 2010): 56–61. http://dx.doi.org/10.1093/njaf/27.2.56.

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Abstract A study of residual stand damage along yarding trails associated with four harvest methods—harvester/forwarder and cable skidder, tractor, and bulldozer with chainsaw felling—was conducted in a group selection harvest of a mixed hardwood stand in Maine. Tractive yardingmethods were associated with greater numbers of damaged trees per meter of trail length. In addition, the bulldozer method resulted in the largest number of damaged boles per 100 m2 of near-trail space, whereas the smallest number of damaged boles per 100 m2 was associatedwith the forwarder method. The tractor method resulted in the most root damage, and the forwarder method resulted in the largest trail width. These results have implications for equipment selection and the planning of harvests and harvest access systems.
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Murray, Alan T. "Route planning for harvest site access." Canadian Journal of Forest Research 28, no. 7 (July 1, 1998): 1084–87. http://dx.doi.org/10.1139/x98-122.

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Route planning and development for operational forest harvesting is an important component of the forest management process. The need for an efficient and low-cost transportation network is significant, as it is likely to dictate or impact the profitability of a particular management plan. Approaches for automating or aiding the road planning process are essential. This paper discusses one interpretation of this planning problem and provides a formal mathematical specification of the problem. This research contributes to the further development of analytical methods for addressing operational forest planning and management.
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CAI, DEQIN. "HARVEST PLANNING UNDER UNCERTAIN EXTINCTION TIME." Natural Resource Modeling 12, no. 3 (June 28, 2008): 273–89. http://dx.doi.org/10.1111/j.1939-7445.1999.tb00013.x.

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Marušák, Róbert, and Jan Kašpar. "Spatially-constrained harvest scheduling with respect to environmental requirements and silvicultural system / Prostorové plánování mýtních těžeb zahrnující environmentální požadavky a hospodářské způsoby." Forestry Journal 61, no. 2 (June 1, 2015): 71–77. http://dx.doi.org/10.1515/forj-2015-0015.

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Abstract There has been an increasing demand for environmental considerations (e.g. unharvested patches) in forest harvest scheduling in the last decades. In Slovakia and the Czech Republic, allowable cut indicators are not based on the spatial structure; thus, they are unable to incorporate these additional conditions. Many harvest scheduling models based on integer and mixed integer programming have been developed throughout the world, but their use in forest management in Slovakia and the Czech Republic is rare. These approaches have mostly been developed for clear-cut management systems and do not exist for shelterwood systems. Harvest scheduling approaches for a two-phase, small-scale shelterwood system and a clear-cut system are presented. The models also include environmental requirements that restrict area of forest stands that are not to be harvested over the planning horizon. A mathematical formulation of that requirement was integrated into the forestry decision support system Optimal to solve all analysed harvest scheduling alternatives for small-scale shelterwood and clear-cut systems. Our results indicated that the total harvest volume amounts could be higher when a two-phase, small- -scale shelterwood system is applied. While there are legal adjacency constraints regulating clear-cut harvests, the influence of additional environmental requirements on the total harvested amount is more restrictive for the shelterwood system because of greater area available for harvest. Both scenarios of maximization of harvested volume and net present value provided comparable results.
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Beltrán-Rodríguez, Leonardo, Juan Ignacio Valdez-Hernández, Alfredo Saynes-Vásquez, José Blancas, José Antonio Sierra-Huelsz, Sol Cristians, Andrea Martínez-Ballesté, et al. "Sustaining Medicinal Barks: Survival and Bark Regeneration of Amphipterygium adstringens (Anacardiaceae), a Tropical Tree under Experimental Debarking." Sustainability 13, no. 5 (March 6, 2021): 2860. http://dx.doi.org/10.3390/su13052860.

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Commercial harvests can threaten tree species harvested for their bark. Amphipterygium adstringens is a dioecious tree, endemic to the tropical dry forests of Mexico, where it is intensively harvested for its medicinal bark. Limited information hinders developing sustainable management strategies for A. adstringens. We assessed bark regeneration for male and female trees, and evaluated the effect of tree sex and diameter, debarking treatments and cutting seasons on bark regeneration and tree survival rates. Bark regeneration was higher for wet season harvested trees (vs. dry), regardless of their sex. Bark regeneration was higher on female than on male trees. There were significant interactions of harvest season, harvest treatment and tree sex diameter on bark regeneration and survival. Overall, the highest bark regeneration rates occurred in female trees with ≥20.1 cm diameter that were wet season harvested with a 50% debarking intensity. Consequently, wet season and intermediate intensity harvests appear to foster sound management, but we recommend against targeting exclusively a single demographic group (i.e., large female trees) due to potential negative impacts on species demography and bark supply. A grounded strategy for sustaining bark harvest would also need to take into account relevant aspects of local socio-ecological context, including harvest interactions with other land uses.
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Karlsson, Jenny, Mikael Rönnqvist, and Johan Bergström. "An optimization model for annual harvest planning." Canadian Journal of Forest Research 34, no. 8 (August 1, 2004): 1747–54. http://dx.doi.org/10.1139/x04-043.

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The problem we consider is annual harvesting planning from the perspective of Swedish forest companies. The main decisions deal with which areas to harvest during an annual period so that the wood-processing facilities receive the required amount of assortments. Each area has a specific size and composition of assortments, and the choice of harvesting areas affects the production level of different assortments. We need to decide which harvest team to use for each area, considering that each team has different skills, home base, and production capacities. Also, the weather and road conditions vary during the year. Some roads cannot be used during certain time periods and others should be avoided. The road maintenance cost varies during the year. Also, some areas cannot be harvested during certain periods. Overall decisions about transportation and storage are also included. In this paper, we develop a mixed integer programming model for the problem. There are binary variables associated with harvesting, allocation of teams, and road-opening decisions. The other decisions are represented by continuous variables. We solve this problem directly with CPLEX 8.1 within a practical solution time limit. Computational results from a major Swedish forest company are presented.
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Dissertations / Theses on the topic "Harvest planning"

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Chamberlain, Brent Charles. "Evolutionary automata for visual resource management planning and harvest design." Thesis, University of British Columbia, 2007. http://hdl.handle.net/2429/31990.

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Increasing pressure to harvest in scenic vistas as a result of increased timber demand has caused significant changes to many beautiful natural scenes. Visual Resource Management aims to reduce the impact of harvests and improve their scenic design while trying to minimize the effect on timber availability. This thesis focuses on two main outcomes. First, a program was created that is capable of automating aspects of the design process in Visual Resource Management. The program, or Model, uses a modified genetic algorithm in combination with a geographical information system to create a final harvest plan that minimizes negative visual impacts for any given timber extraction level. The Model was tested across an array of different landscape terrain, including mountains, hills and valleys, to show its ability to deal with complex situations. Second, the thesis was created to better understand the relationship between timber availability and visible alteration. Results suggest a capacity for increased levels of aesthetic design while also increasing timber availability when compared with previous studies. Thus, the end product is a program that is capable of being adapted to real world situations by aiding in the harvest design process and producing a plan that tries to maximize both timber availability and the aesthetic properties of a landscape. This decision support tools allows planners to manipulate "what if” scenarios to ascertain the effects of varying timber extraction levels and visible alteration percentages.
Forestry, Faculty of
Graduate
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Karlsson, Jenny. "Optimization models and methods for harvest planning and forest road upgrading /." Linköping : Dept. of Mathematics, Univ, 2005. http://www.bibl.liu.se/liupubl/disp/disp2005/tek956s.pdf.

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Turner, Aaron P. "DEVELOPMENT OF A DECISION SUPPORT SYSTEM FOR CAPACITY PLANNING FROM GRAIN HARVEST TO STORAGE." UKnowledge, 2018. https://uknowledge.uky.edu/bae_etds/58.

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This dissertation investigated issues surrounding grain harvest and transportation logistics. A discrete event simulation model of grain transportation from the field to an on-farm storage facility was developed to evaluate how truck and driver resource constraints impact material flow efficiency, resource utilization, and system throughput. Harvest rate and in-field transportation were represented as a stochastic entity generation process, and service times associated with various material handling steps were represented by a combination of deterministic times and statistical distributions. The model was applied to data collected for three distinct harvest scenarios (18 total days). The observed number of deliveries was within ± 2 standard deviations of the simulation mean for 15 of the 18 input conditions examined, and on a daily basis, the median error between the simulated and observed deliveries was -4.1%. The model was expanded to simulate the whole harvest season and include temporary wet storage capacity and grain drying. Moisture content changes due to field dry down was modeled using weather data and grain equilibrium moisture content relationships and resulted in an RMSE of 0.73 pts. Dryer capacity and performance were accounted for by adjusting the specified dryer performance to the observed level of moisture removal and drying temperature. Dryer capacity was generally underpredicted, and large variations were found in the observed data. The expanded model matched the observed cumulative mass of grain delivered well and estimated the harvest would take one partial day longer than was observed. Usefulness of the model to evaluate both costs and system performance was demonstrated by conducting a sensitivity analysis and examining system changes for a hypothetical operation. A dry year and a slow drying crop had the largest impact on the system’s operating and drying costs (12.7% decrease and 10.8% increase, respectively). The impact of reducing the drying temperature to maintain quality in drying white corn had no impact on the combined drying and operating cost, but harvest took six days longer. The reduced drying capacity at lower temperatures resulted in more field drying which counteracted the reduced drying efficiency and increased field time. The sensitivity analysis demonstrated varied benefits of increased drying and transportation capacity based on how often these systems created a bottleneck in the operation. For some combinations of longer transportation times and higher harvest rates, increasing hauling and drying capacity could shorten the harvest window by a week or more at an increase in costs of less than $12 ha-1. An additional field study was conducted to examine corn harvest losses in Kentucky. Total losses for cooperator combines were found to be between 0.8%-2.4% of total yield (86 to 222 kg ha-1). On average, the combine head accounted for 66% of the measured losses, and the total losses were highly variable, with coefficients of variation ranging from 21.7% to 77.2%. Yield and harvest losses were monitored in a single field as the grain dried from 33.9% to 14.6%. There was no significant difference in the potential yield at any moisture level, and the observed yield and losses displayed little variation for moisture levels from 33.9% to 19.8%, with total losses less than 1% (82 to 130 kg dry matter ha-1). Large amounts of lodging occurred while the grain dried from 19.8% to 14.6%, which resulted in an 18.9% reduction in yield, and harvest losses in excess of 9%. Allowing the grain to field dry generally improved test weight and reduced mechanical damage, however, there was a trend of increased mold and other damage in prolonged field drying.
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Meade, Gregory S. "An evaluation of timber harvest planning training on logging quality in the Virginia Piedmont." Thesis, Virginia Tech, 1996. http://hdl.handle.net/10919/44970.

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Interest in BMP-related logger education and training has increased dramatically in recent years. Harvest planning is a critical component of forestry water quality BMPs. All states’ BMP manuals recommend written timber harvest plans, and several states require them by law. The objective of this study was to evaluate the impact of harvest planning training and the use of written timber harvest plans on BMP compliance, landowner satisfaction and weather-related downtime in the Virginia Piedmont. Nine randomly chosen loggers (study group) from the Virginia Piedmont participated in two days of intensive harvest planning field training. Nine additional loggers were randomly chosen as a control group. Study loggers prepared and followed written timber harvest plans for the 29 tracts they harvested during the 8-month study period immediately following the training. Study Group loggers outperformed Control Group loggers for mean BMP compliance (90% vs. 86%), mean landowner satisfaction (3.54/4.0 vs. 3.27/4.0), and mean weather-related downtime (10% vs. 13%). Absolute scores for all evaluation criteria for both groups were good, and differences, though statistically significant, were relatively small, leading to conclusions that: • Loggers in the Virginia Piedmont are generally doing a good job. • Loggers in the Virginia Piedmont are planning their operations, whether a written plan is required or not. • Harvest planning training and written harvest plans can marginally improve BMP compliance, landowner satisfaction and weather-related downtime, even for loggers who are already performing well.
Master of Science
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Ackerman, Simon Alexander. "The effect of irregular stand structures on growth, wood quality and its mitigation in operational harvest planning of Pinus patula stands." Thesis, Stellenbosch : Stellenbosch University, 2013. http://hdl.handle.net/10019.1/85874.

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Thesis (MScFor)--Stellenbosch University, 2013.
ENGLISH ABSTRACT: The practice of combining row and selective thinning in commercial pine plantation silviculture carries the risk of unwanted irregularities in tree distribution within the stand. This situation is aggravated with poor tree selection during marking. The potential consequences of poor tree selection are gaps created along row removals, which are necessary for access to harvesting operations. These gaps lead to spatially asymmetric growing space among adjacent trees. The effect of irregular stand structures on tree morphology and growth are investigated in this study, and are based on two stands of Pinus patula, (Schiede ex Schlechtendal et Cham.) in Langeni plantation, South Africa. This study focuses on two aspects. Firstly, a comparison between trees grown in all-sided and one-sided spatial competition situations in order to assess if there are differences in growth and selected quality parameters. Secondly, the mitigation of irregular structures using a simulation based study on changing the planting geometry in order to investigate the effect on harvesting in terms of stand impact, simulated harvesting productivity and harvesting system costs. Results showed that trees grown in an irregular competitive status have significantly larger crown diameters, crown lengths, longer and thicker branches, disproportionately one sided crown growth and a reduction in space-use efficiency. Simulations indicated that changing planting geometry from the current 2.7m x 2.7m to 2.3m x 3.1m and 2.4m x 3m would result in up to a 20% reduction of machine trail length and fewer rows being removed for machine access. The simulation of harvesting thinnings showed that various planting geometry alternatives increased harvesting productivity by 10% to 20% and reduced overall thinning harvesting cost by up to 11%. This study successfully investigated the factors that potentially negatively affect saw timber quality and volume production of the stand at final felling. It also illustrated the applicability of simulation methods for testing harvesting scenarios and developing economically viable alternatives.
AFRIKAANSE OPSOMMING: Die praktiese kombinasie van ryuitdunning en seleksiedunning in kommersiële denneplantasies dra die risiko van ongewensde onreelmatighede in die verspreiding van bome in die opstand. Hierdie situasie word vererger deur swak boomseleksie tydens die merk van dunnings. Die potensiële gevolge van swak boomseleksie is die ontstaan van onreelmatige gapings tussen boomkrone, veral langs die rydunnings, wat nodig is vir toegang tydens die ontginning van die hout. Dit lei daartoe dat die bome langs die dunningsrye asimmetriese ruimtes het om in te groei. Die effek van onreelmatige opstandstrukture op boom-morfologie en -groei word in hierdie studie ondersoek in twee Pinus patula, (Schiede ex Schlechtendal et Cham.) vakke te Langeni plantasie, Suid-afrika. In die studie word daar gefokus op twee aspekte. Eerstens word bome wat onder toestande van eweredige ruimetlike kompetisie groei vergelyk met die wat onder toestande van eensydige ruimtelike kompetisie groei om sodoende vas te stel of daar verskille is in die groeipatroon aan die hand van geselekteerde gehalteparameters. Tweedens word daar gefokus op die verbetering van onreelmatige opstandstrukture deur gebruik te maak van ’n simulasie-gebasseerde studie om veranderinge in die aanplantingsgeometrie te ondersoek met die doel om die effek van plantspasieering op ontginningsimpakte, gesimuleerde ontginningsproduktiwiteit en -sisteem koste te bepaal. Die resultate het getoon dat bome wat onder toestande van onreelmatige spasieering en kompetisie groei krone met groter deursnee asook langer lengtes ontwikkel, langer en dikker takke het, disproporsionele, eensydige kroongroei en ’n reduksie in ruimte-gebruik toon, wat die groeidoeltreffendheid nadelig beinvloed. Simulasies met betrekking tot die verandering in boomaanplantgeometrie vanaf die huidige 2.7m x 2.7m na 2.3m x 3.1m en 2.4m x 3m het gedui op ’n reduksie van 20% in die masjienpadafstand en na minder rye wat uitgehaal moes word om die toegang van masjiene moontlik te maak. Die simulasie van die ontginning van dunnings het getoon dat verskillende aanplantgeometriealternatiewe die ontginningsproduktiwiteit met 10% tot 20% verbeter het, en die algehele dunningsoeskoste met tot 11% verminder het. In hierdie studie is die faktore, wat die gehalte van saaghoutkwaliteit en volume tydens die finale oes van die plantasie potensieel negatief mag beinvloed, suksesvol ondersoek. Dit illustreer ook die geskiktheid van simulasietoepassings vir die toets van ontginningsalternatiewe en die ontwikkelling van meer ekonomies voordelige praktyke .
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Hellström, Maria. "När gallringsentreprenören avverkningsplanerar : Hur påverkas arbetsmiljön och kostnaderna samt hur upplevs arbetssättet?" Thesis, Linnéuniversitetet, Institutionen för skog och träteknik (SOT), 2017. http://urn.kb.se/resolve?urn=urn:nbn:se:lnu:diva-65929.

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At the Swedish forest owner association Mellanskog pre-harvest planning prior to thinning is traditionally performed by company foresters. In the past three years, Mellanskog has in one business area, instead outsourced pre-harvest planning to thinning contractors. The purpose of this study was to investigate how the outsourcing of pre-harvest planning is perceived by the company foresters and contractors and how it affects the working environment and costs. The study showed positive experiences from foresters and contractors, though there were some responsibility issues and economic concerns. Outsourcing improves the contractor’s working environment, but deteriorates that of the foresters. Having foresters performing the pre-harvest planning is more expensive than having contractors performing it, especially on small harvesting worksites.
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Odhiambo, Benedict O. "The use of time study, method study and GPS tracking in improving operational harvest planning in terms of system productivity and costs." Thesis, Stellenbosch : University of Stellenbosch, 2010. http://hdl.handle.net/10019.1/5333.

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Thesis (MScFor (Dept. of Forest and Wood Science)--University of Stellenbosch, 2010.
ENGLISH ABSTRACT: This study aims to quantify the benefits of implementing an operational harvesting plan in forest harvesting operations. This is to be achieved by comparing productivity and costs from unplanned and planned harvesting operations. The study was conducted on a Pinus radiata plantation owned by Mountain to Ocean Forestry Company (Pty) Ltd (MTO) located near the town of Grabouw in the Western Cape Province of South Africa. MTO conducts harvesting operations using semi-mechanised tree-length harvesting systems. A wheeled H67 Clark Ranger cable skidder is used to extract tree-lengths from infield to the landing. Data was obtained both manually (work study) and from GPS tracking. Choking and dechoking data was obtained through time and method studies. GPS tracking was used to measure travel loaded and travel empty times, as well as travel distances and travel speeds. The aim of using both manual techniques and GPS tracking was to obtain detailed and spatially accurate information about the operation. The operating costs were estimated using South African Harvesting and Transport Costing Model. Productivity of the newly introduced tagline system (45.97 m³/pmh) exceeded that of mainline system (37.85 m³/pmhh) by 26%. The unit production cost of using tagline system (R20.21/m³) was 10% lower than the unit production cost of using mainline system (R22.54/³3). There were no benefits to be gained from improving the level of skid trail construction by removal of logging residue or cutting down stumps to as near the ground level as possible. A combination of manual (time and method studies) data collection and GPS tracking provided more detailed and accurate information on the semi-mechanised harvesting system.
AFRKAANSE OPSOMMING: Hierdie studie beoog om die voordele van die uitvoering van 'n operasionele inoestingsplan te kwantifiseer. Dit word bereik deur produktiwiteit en kostes van beplande en onbeplande inoestingswerksaamhede te vergelyk. Die studie is gedoen in Pinus radiata opstande van Mountain to Ocean Forestry Company (Pty) Ltd (MTO) naby Grabouw in die Wes-Kaap provinsie van Suid Afrika. MTO gebruik semi-gemeganiseerde boomlengte inoestingstelsels in hul inoestingswerksaamhede. . H67 Clark Ranger wielsleeptrekker met kabel en wenas is gebruik om boomlengtes van die veld na die pad te sleep. Data is versamel deur van beide hand (werkstudie) en GPS-opsporing gebruik te maak. Afhaak en aanhaak data is verkry deur van tyd- en metodestudies gebruik te maak. Gelaaide en ongelaaide tyd, spoed en afstande is met behulp van die GPS gemeet. Deur van beide hand en GPS versamelingsmetodes gebruik te maak, kon omvattende sowel as ruimtelik akkurate inligting oor die werksaamhede verkry word. Die bedryfskostes is verkry van die South African Harvesting and Transport Costing Model. Produktiwiteit van die nuut ingestelde verbindingslynstelsel (45.97 m³/pmh) het die hooflynstelsel (37.85 m³/pmh) met 26% oorskry. Die eenheidsproduksiekoste van die verbindingslynstelsel (R20.21/m³) was 10% laer as die eenheidsproduksiekoste van die hooflynstelsel (R22.54/m³). Daar was geen voordeel in die verbetering van die sleeppad konstruksie deur afval te verwyder of stompe nader aan die grondvlak af te sny nie. 'n Kombinasie van hand (tyd- en metodestudies) dataversameling en GPS-opsporing het meer akkurate en omvattende inligting oor die semi-gemeganiseerde inoestingstelsel verskaf.
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Rijal, Baburam. "A forest management decision support system for sustainable management of flammable boreal forest landscapes : an integrated policy approach to timber harvest planning." Doctoral thesis, Université Laval, 2017. http://hdl.handle.net/20.500.11794/27722.

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Les feux sont un phénomène naturel dans la forêt boréale du Canada. Ils sont étroitement liés à la croissance et au développement de cet écosystème. Cependant, l’augmentation des activités anthropiques associées au changement climatique graduel peuvent provoquer un accroissement des épisodes de feux. Un tel accroissement pourrait avoir des effets indési-rables sur l'industrie forestière en raison d’une rupture de l'approvisionnement en bois sur une période de planification à long terme. Cette thèse explore une approche alternative pour concevoir des stratégies qui réduiront l'impact potentiel des feux de forêt sur les revenus à long terme générés par la vente de produits forestiers ciblés, et ce, au moyen d’une politique d’aménagement forestier spécifique. L'étude est basée sur les données de trois unités d’aménagement forestier localisées dans la région boréale de la province de Québec au Ca-nada. Les modèles de politique de planification de la récolte forestière ont été résolus en utilisant la programmation linéaire intégrée avec un taux de brûlage constant. Les options de récolte prescrites par les modèles de planification ont été évaluées à l’aide d’un modèle de simulation de paysage intégré avec un taux de brûlage stochastique. Parmi les quatre modèles pris en compte, le modèle verticalement intégré (modèle 4) a géné-ré les revenus les plus élevés tout en ayant les variations les moins importantes de revenu au sein et entre les périodes pour l'horizon de planification. Ce modèle a permis de maximiser la valeur actuelle nette des recettes provenant de la vente de produits de première transfor-mation pour les deux premières périodes soumis à une récolte forestière constante et à des volumes de bois récupérés durant une période de planification complète. Les revenus plus élevés et les variations plus faibles suggèrent que le modèle peut réduire le risque des im-pacts des feux de forêt sur les revenus comparativement aux trois autres modèles, y compris le modèle de rendement soutenu qui maximise le volume de la récolte soumis à des flux constants du volume de récolte durant une période de planification (modèle 1). L'analyse des dépenses de gestion des incendies a démontré que l’augmentation de telles dépenses peut réduire le coût de lutte contre les feux et augmenter les revenus de la récolte tout en diminuant la variabilité. Cependant, il y a un niveau optimal de dépense qui dépend de la structure forestière et des régimes de feux. Par conséquent, une répartition optimale des dépenses de prévention peut réduire le risque d'impact du feu sur l’économie forestière à long terme. La pérennité des écosystèmes est importante en gestion forestière. Par conséquent, l'intégri-té écologique est de plus en plus préoccupante en ce qui concerne les forêts publiques cana-diennes qui sont aménagées à des fins commerciales. La mise en œuvre d’une politique de récolte exigeant la conservation des vieilles forêts tout en tenant compte de l'impact poten-tiel du feu peut avoir des effets négatifs sur les revenus. Les impacts peuvent être réduits en choisissant une politique de gestion forestière alternative. La réduction des revenus à court terme peut être compensée par des retours à long terme générés par la valeur ajoutée asso-ciée à l'âge du bois en utilisant des politiques alternatives. Finalement, les résultats démontrent que le modèle de planification de la récolte intégrée verticalement et l’optimisation des efforts de gestion du feu peuvent accroître les revenus à moyen et à long terme de l'industrie forestière. Le modèle réduit le risque de perte de reve-nus lié à la rupture de l'approvisionnement lorsque l'impact du feu est inclus dans le proces-sus de planification. De plus, les solutions prescrites dans ce modèle aident à réduire le taux de récolte et à augmenter le volume des stocks qui peut être un coussin en prévision des feux qui surviennent de façon très variable au cours des périodes de l’horizon de planification.
Forest fire is a natural process in the boreal forest region of Canada and it is strongly con-nected to forest growth and development. Yet, increasing anthropogenic activities coupled with gradual climate change can increase fire occurrence and area burned. Such an increase may cause adverse impacts on the forest-based economy by the potential disruption of tim-ber supply over a long-term planning horizon. This thesis explores an alternative approach to designing strategies to reduce the potential impact of fire on long-term revenues generated by the sale of prescribed harvest products using a specified forest management policy. The study is based on data from three commercially-managed forests located in the boreal forest region of the province of Quebec, Canada. The harvest planning policy models were solved using a constant average annual burn rate-embedded in a linear programming model. The harvest solutions prescribed by the planning model were evaluated by implementing them in a stochastic landscape simulation model. Among the four policy models examined, vertically integrated model (model 4) generated the highest revenue with the least within- and among-period variation in revenue over the planning horizon. This model maximized the net present value from the sale of primary-processed wood products for the first two periods subjecting to the constant flows of har-vest timber and recovered lumber volumes for an entire planning horizon. The higher reve-nue and lower variation suggest that the model can have lower risk of fire impacts on reve-nue compared with the other three models including the status quo sustained-yield policy model (model 1) that maximizes harvest timber volume subject to constant flows of the harvest volume over the planning horizon. Analysis of fire management expenditures demonstrated that increased presuppression ex-penditure can reduce suppression costs and increase the revenue from the harvest while lowering the variability. However, there is an optimal level of expenditure, which depends on the structure of the forest and fire regimes. Hence, an optimal allocation of presuppres-sion expenditure can reduce the risk of the fire on the long-term economics of the forest. Ecosystem sustainability is important for forest management. Therefore, ecological integrity is of increasing concern with respect to commercially-managed public forests in Canada. Implementation of a harvest policy with strict requirement of old-growth forest area con-straint while accounting for the possible impact of fire can have adverse impacts on reve-nue. The impacts can be reduced by selecting alternative forest management policies. The short-term reduction in revenue from harvests can be compensated for by long-term eco-nomic returns provided by age-related value accumulation of the harvest timber using alter-native policies. Finally, based on the results, the vertically integrated harvest planning model coupled with optimal fire management efforts can increase long-term average revenue to wood industry. The model lowers the risk of loss of revenue due to supply disruptions when the impact of fire is accounted for in the planning process. In addition, the solutions prescribed by this model help reduce the harvest rate and increase stock volume which can act as a buffer for the highly variable potential fires in the successive periods over a planning horizon.
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Ashford, William H. "Leading selected church members in developing a ministry-driven strategy for family members of chemically addicted persons in Capshaw Baptist Church of Harvest, Alabama." Theological Research Exchange Network (TREN) Theological Research Exchange Network (TREN) Access this title online, 2005. http://www.tren.com.

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Banhara, José Rodrigo. "Agendamento otimizado das atividades de colheita de madeira em plantios de eucaliptos sob restrições operacionais, espaciais e de risco climático." Universidade de São Paulo, 2009. http://www.teses.usp.br/teses/disponiveis/11/11150/tde-05082009-074058/.

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A preocupação com a sustentabilidade nos empreendimentos florestais, em relação aos aspectos ambientais, sociais e econômicos, tem se evidenciado como uma realidade crescente. Para representar essa preocupação na elaboração nos planos de manejo florestal, buscou-se atribuir maior grau de detalhamento nas análises e compreensão da interação desses aspectos para prevenir possíveis impactos futuros e avaliar soluções a serem adotadas. Entretanto, esse detalhamento, representado pelo planejamento em níveis tático e operacional, muitas vezes é elaborado através de métodos que podem apresentar alto grau de risco relacionado à ocorrência de soluções não realistas, prejudicando o processo de tomada de decisão. Nesse contexto, este estudo teve como objetivo aprimorar as técnicas de planejamento operacional de colheita, através da elaboração de um modelo de programação linear padrão, avaliar esse modelo em diferentes cenários sujeitos a restrições ambientais e de abastecimento de uma empresa usada como estudo de caso, e realizar a comparação entre os resultados obtidos nesses cenários com os resultados efetivamente verificados pela empresa durante os períodos de avaliação. O estudo de caso considerou as áreas de produção de uma empresa florestal produtora de celulose no Uruguai a partir de plantações de eucalipto, onde foram selecionadas áreas para colheita em três anos consecutivos. A partir dessas áreas e parâmetros de produção dos povoamentos florestais, e das características da operação de colheita e expectativas do setor industrial, foi elaborado um modelo de programação linear inteira mista com minimização de desvios de metas. Através desse modelo foram avaliadas a ampliação da capacidade operacional, restrições ambientais e de abastecimento. A restrição ambiental exigiu a classificação das áreas de corte quanto à probabilidade de ocorrência de danos ao meio ambiente durante a operação de colheita em determinadas épocas do ano. A restrição de abastecimento considerou a regulação da densidade média da madeira entregue na indústria em cada período de análise, de acordo com um intervalo máximo de variação de 5% em relação á média geral. Já, a ampliação da capacidade operacional envolveu a análise de contratação de equipes terceirizadas para dar suporte à operação de colheita em determinados períodos. Além disso, o modelo matemático permitiu a incorporação de limites de deslocamento espacial da frente de colheita ao longo dos períodos de avaliação. Como resultado, foi selecionado um conjunto de indicadores de desempenho para a avaliação dos itens considerados no modelo, bem como suas interações, além da comparação dos cenários com os resultados realizados para cada um desses indicadores. O estudo mostra que é possível elaborar um modelo de programação linear capaz de representar o planejamento operacional de colheita, além de incorporar aspectos produtivos, ambientais e de abastecimento. A comparação dos resultados gerados pelo modelo nos diferentes cenários com os resultados obtidos pela empresa no período de análise mostrou a possibilidade de melhora na qualidade das soluções ao fazer uso das técnicas de programação linear e a vantagem da utilização de técnicas de planejamento mais holísticas.
Sustainability concerns in forest-based industries, as related to environmental, social and economic aspects, have been highlighted with crescent realism. Therefore, forest management plans must consider a greater level of details when analyzing and understanding the interaction among these aspects to prevent possible future impacts. At the tactical and operational planning levels, methods based on generic assumptions usually provide non-realistic solutions, impairing the decision making process. This study is aimed to improve current operational harvesting planning techniques, through the development of a standard linear programming model that allows for the evaluation of different scenarios, subject to environmental and supply constraints, and that provides the basic framework for comparisons with the results observed in the study case during the period of assessment. The study case comprised eucalyptus plantations harvested by a pulp mill in Uruguay over three consecutive years. Forest plantation parameters, like area, growth, harvesting conditions etc., and industrial requirements were mathematically represented in a linear mixed integer goal programming model. The model considered the increase on operational capacity and was constrained by environmental and supply limits. The environmental constraint required the classification of harvesting areas according to impacts due to environmental damages incurred during harvest operations. The supply constraint considered the need for regulating the average wood density and imposed a maximum range of variation of 5% on overall average. The possibility of increasing operational capacity was allowed by hiring outsourced crews to support harvest operations in certain periods. Furthermore, the spatial consequences of dispatching harvest crews to certain distances over the evaluation period were also considered. As a result, a set of performance indicators was selected to evaluate all optimal solutions provided to different possible scenarios and combinations of these scenarios, and to compare these outcomes with the real results observed by the mill in the study case area. Results showed that it is possible to elaborate a linear programming model that represents adequately harvesting limitations, production aspects, and environmental and supply constraints. The comparison involving the evaluated scenarios and the real observed results showed the advantage of using more holistic approaches and that it is possible to improve the quality of the planning recommendations using linear programming techniques.
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Books on the topic "Harvest planning"

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Leuschner, William A. Forest regulation, harvest scheduling, and planning techniques. New York: Wiley, 1990.

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Service, Alberta Forest. Alberta timber harvest planning and operating ground rules. Edmonton, AB: Alberta Forestry, Lands and Wildlife, Forest Service, 1987.

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Forest regulation, harvest scheduling, and planningtechniques. New York: Wiley, 1990.

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Ltd, Daishowa Canada Co. Daishowa Canada Co. Ltd. timber harvest planning and operating ground rules. Edmonton, AB: Alberta Forestry, Lands and Wildlife, Forest Service, 1991.

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Perloff, Harvey S. The art of planning: Selected essays of Harvey S. Perloff. New York: Plenum Press, 1985.

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Nominations of Thomas E. Harvey to be Assistant Secretary for Congressional and Legislative Affairs, Department of Veterans Affairs, and Patrick W. Dunne to be Assistant Secretary for Policy and Planning, Department of Veterans Affairs: Hearing before the Committee on Veterans' Affairs, United States Senate, One Hundred Ninth Congress, second session, July 27, 2006. Washington: U.S. G.P.O., 2007.

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Office, General Accounting. Forest Service: Amount of timber offered, sold, and harvested, and timber sales outlays, fiscal years 1992 through 1997 : report to the Chairman, Subcommittee on Department Operations, Oversight, Nutrition, and Forestry, Committee on Agriculture, House of Representatives. Washington, D.C. (P.O. Box 37050, Washington, D.C. 20013): The Office, 1999.

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Nelson, John Douglas. Integrating short-term spatially feasible harvest plans with long- term harvest schedules using Monte-Carlo integer programming and linear programming. 1988.

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Nelson, John Douglas. Integrating short-term spatially feasible harvest plans with long- term harvest schedules using Monte-Carlo integer programming and linear programming. 1988.

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High Impact Church Planning: You Can be Part of a Harvest Directed Ministry. Visionquest Ministries, 2003.

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Book chapters on the topic "Harvest planning"

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Marques, Alexandra S., Jean François Audy, Sophie D’Amours, and Mikael Rönnqvist. "Tactical and Operational Harvest Planning." In The Management of Industrial Forest Plantations, 239–67. Dordrecht: Springer Netherlands, 2014. http://dx.doi.org/10.1007/978-94-017-8899-1_7.

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Bergström, Johan, Jenny Karlsson, and Mikael Rönnqvist. "Annual Harvest Planning Integrated with Crew Assignment and Transportation Planning." In Managing Forest Ecosystems, 87–89. Dordrecht: Springer Netherlands, 2003. http://dx.doi.org/10.1007/978-94-017-0307-9_9.

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Meilby, Henrik, Bo J. Thorsen, and Niels Strange. "Adaptive spatial harvest planning under risk of windthrow." In Recent Accomplishments in Applied Forest Economics Research, 49–61. Dordrecht: Springer Netherlands, 2003. http://dx.doi.org/10.1007/978-94-017-0279-9_4.

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González-Araya, Marcela C., Wladimir E. Soto-Silva, and Luis G. Acosta Espejo. "Harvest Planning in Apple Orchards Using an Optimization Model." In Handbook of Operations Research in Agriculture and the Agri-Food Industry, 79–105. New York, NY: Springer New York, 2015. http://dx.doi.org/10.1007/978-1-4939-2483-7_4.

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Yoshimoto, Atsushi. "Risk Analysis in the Context of Timber Harvest Planning." In Risk Analysis in Forest Management, 113–48. Dordrecht: Springer Netherlands, 2001. http://dx.doi.org/10.1007/978-94-017-2905-5_5.

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Mason, Nicholas, Héctor Flores, J. René Villalobos, and Omar Ahumada. "Planning the Planting, Harvest, and Distribution of Fresh Horticultural Products." In Handbook of Operations Research in Agriculture and the Agri-Food Industry, 19–54. New York, NY: Springer New York, 2015. http://dx.doi.org/10.1007/978-1-4939-2483-7_2.

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Couto, Luis Diogo, Peter W. V. Tran-Jørgensen, and Gareth T. C. Edwards. "Model-Based Development of a Multi-algorithm Harvest Planning System." In Advances in Intelligent Systems and Computing, 19–33. Cham: Springer International Publishing, 2017. http://dx.doi.org/10.1007/978-3-319-69832-8_2.

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Sornprom, Thanaphorn, Voratas Kachitvichyanukul, and Kanokporn Kungwalsong. "Resilience Analysis for Integrated Planning of Selective Harvesting and Post-harvest Operations." In Smart and Sustainable Supply Chain and Logistics – Trends, Challenges, Methods and Best Practices, 407–21. Cham: Springer International Publishing, 2020. http://dx.doi.org/10.1007/978-3-030-61947-3_28.

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Dunsworth, B. G., and S. M. Northway. "Spatial Assessment of Habitat Supply and Harvest Values as a Means of Evaluating Conservation Strategies: A Case Study." In Assessment of Biodiversity for Improved Forest Planning, 315–29. Dordrecht: Springer Netherlands, 1998. http://dx.doi.org/10.1007/978-94-015-9006-8_30.

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Charles, A. T., and C. W. Yang. "A Decision Support Model for Coastal Fishery Planning: Optimal Capacity Expansion and Harvest Management." In Operations Research and Management in Fishing, 71–88. Dordrecht: Springer Netherlands, 1990. http://dx.doi.org/10.1007/978-94-011-3280-0_6.

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Conference papers on the topic "Harvest planning"

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A. Alarcón Gerbier, Eduardo, Marcela C. Gonzalez-Araya, and Masly M. Rivera Moraga. "Supporting Harvest Planning Decisions in the Tomato Industry." In 6th International Conference on Operations Research and Enterprise Systems. SCITEPRESS - Science and Technology Publications, 2017. http://dx.doi.org/10.5220/0006193203530359.

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Deepradit, Siraprapha, Roongrat Pisuchpen, and Pornthipa Ongkunaruk. "The harvest planning of aromatic coconut by using Monte Carlo simulation." In 2017 4th International Conference on Industrial Engineering and Applications (ICIEA). IEEE, 2017. http://dx.doi.org/10.1109/iea.2017.7939190.

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Moura, Arnaldo Vieira, and Rafael Augusto Scaraficci. "Hybrid Heuristic Strategies for Planning and Scheduling Forest Harvest and Transportation Activities." In 2008 IEEE 11th International Conference on Computational Science and Engineering (CSE). IEEE, 2008. http://dx.doi.org/10.1109/cse.2008.31.

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Abdullah, Munaisyah, Salwani Abdullah, Abdul Razak Hamdan, and Roslan Ismail. "Optimization model in timber harvest planning based on an incremental solution approach." In 2009 2nd Conference on Data Mining and Optimization. IEEE, 2009. http://dx.doi.org/10.1109/dmo.2009.5341908.

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Abdullah, Munaisyah, Salwani Abdullah, Abdul Razak Hamdan, and Roslan Ismail. "Optimisation model of selective cutting for Timber Harvest Planning in Peninsular Malaysia." In 2011 3rd Conference on Data Mining and Optimization (DMO). IEEE, 2011. http://dx.doi.org/10.1109/dmo.2011.5976536.

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Gunchenko, Yu A., S. A. Shvorov, V. I. Zagrebnyuk, V. U. Kumysh, and E. S. Lenkov. "Using UAV for unmanned agricultural harvesting equipment route planning and harvest volume measuring." In 2017 IEEE 4th International Conference Actual Problems of Unmanned Aerial Vehicles Developments (APUAVD). IEEE, 2017. http://dx.doi.org/10.1109/apuavd.2017.8308825.

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Athani, Suhas, C. H. Tejeshwar, Mayur M. Patil, Priyadarshini Patil, and Rahul Kulkarni. "Soil moisture monitoring using IoT enabled arduino sensors with neural networks for improving soil management for farmers and predict seasonal rainfall for planning future harvest in North Karnataka — India." In 2017 International Conference on I-SMAC (IoT in Social, Mobile, Analytics and Cloud) (I-SMAC). IEEE, 2017. http://dx.doi.org/10.1109/i-smac.2017.8058385.

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W.J. Conroy. "Use of WEPP Modeling in Watershed Analysis and Timber Harvest Planning1." In 2001 Sacramento, CA July 29-August 1,2001. St. Joseph, MI: American Society of Agricultural and Biological Engineers, 2001. http://dx.doi.org/10.13031/2013.7501.

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Iranmanesh, Nasim. "Improving the identity of historic city by considering hydraulic infrastructure (the case study: Qazvin city)." In 55th ISOCARP World Planning Congress, Beyond Metropolis, Jakarta-Bogor, Indonesia. ISOCARP, 2019. http://dx.doi.org/10.47472/ltnh6301.

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Recently the importance of maintaining of historic identity of the cities is an obvious matter in restoration of a city. Each city depends on its cultural perception and its wealth, tries to reserve and repair its cultural heritage. This matter has been done in many cities in the world and many historic urban fabrics have been restored and rehabilitated to be visited by many tourists to enjoy their atmosphere and physical and spiritual features. Iran is a country with limited water resources but in spite of this fact there are many ancient civilizations and old cities with valuable urban fabrics in them which have intellectual irrigation. The water of most cities of Iran mostly harvested from underground water by a technic which is called Qanat which irrigate city and farms. Water supplement in urban fabric and locating the hydraulic structure in cities had an important effect in forming the city which this impact shouldn’t be ignored in repairing or rehabilitation of urban fabric. In the other word hydraulic infrastructure of historic cities of Iran in hot and dry region is an important factor which shouldn’t forget during planning for rehabilitation. The route of water either underground route or surface water and also hydraulic structures which have been located in the path of water should be preserved. The case study is Qazvin city which its historic hydraulic infrastructure and hydraulic structures had an important effect in forming the city.
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Sari, L. Triqui, M. Bennekrouf, A. Bensmaine, and N. Ameurberrahou. "Routing Planning of the Different Harvester for Organizing the Harvesting of Sugar Beet." In 2019 International Colloquium on Logistics and Supply Chain Management (LOGISTIQUA). IEEE, 2019. http://dx.doi.org/10.1109/logistiqua.2019.8907318.

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