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Статті в журналах з теми "Thinning regimes"

Автор: Grafiati

Опубліковано: 3 червня 2025

Оновлено: 31 липня 2025

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1

David, Hassan Camil, Julio Eduardo Arce, Edilson Batista de Oliveira, Sylvio Péllico Netto, Rodrigo Otávio Veiga de Miranda, and Ângelo Augusto Ebling. "Economic analysis and revenue optimization in management regimes of Pinus taeda." Revista Ceres 64, no. 3 (2017): 222–31. http://dx.doi.org/10.1590/0034-737x201764030002.

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ABSTRACT The objective of this work was to select, using operational research techniques, management regimes of Pinus taeda L. that maximize the revenue generated by the wood, considering different attractiveness rates. The OpTimber-LP® software, which performs the simulations using SisPinus® software, was used for forest optimization. The regimes consisted of different combinations of forest sites, planting densities, thinning regimes and clearcutting ages, totaling 17,760 regimes per site. Wood production was quantified and evaluated by assortment classes. Planting, thinning and harvesting c

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2

Haight, Robert G. "Optimal management of loblolly pine plantations with stochastic price trends." Canadian Journal of Forest Research 23, no. 1 (1993): 41–48. http://dx.doi.org/10.1139/x93-007.

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An economic analysis of loblolly pine (Pinustaeda L.) plantation management options with stochastic sawtimber and pulpwood stumpage price trends is conducted using the North Carolina State University Plantation Management Simulator, a widely used model in the southeastern United States. Results for stands with a range of site indices suggest that regimes with high planting densities combined with commercial thinning options have higher expected present values than do regimes without thinning options, especially in plantations with hardwood competition. Such regimes are superior because high pl

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3

Rimal, Simant, Marc Djahangard, and Rasoul Yousefpour. "Forest Management under Climate Change: A Decision Analysis of Thinning Interventions for Water Services and Biomass in a Norway Spruce Stand in South Germany." Land 11, no. 3 (2022): 446. http://dx.doi.org/10.3390/land11030446.

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Climate change is producing threats to forests’ capacity of regulating water regimes. Therefore, thinning strategies can be applied to mitigate climate change impacts more efficiently by providing more spaces for trees to utilize resources e.g., water and nutrients. This study examined the effects of different thinning intensities and intervals on water characteristics and biomass growth of a 75-year-old Norway spruce (Picea abies) stand in the Black Forest, Germany. Here we used a water and management sensitive update of the process-based forest growth model 3PG, 3PG-Hydro. We applied light (

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4

Karlsson, Kjell, and Lennart Norell. "Modelling survival probability of individual trees in Norway spruce stands under different thinning regimes." Canadian Journal of Forest Research 35, no. 1 (2005): 113–21. http://dx.doi.org/10.1139/x04-161.

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The probability that an individual tree will remain in even-aged Norway spruce (Picea abies (L.) Karst.) stands subjected to different thinning programmes was modelled, using data from a thinning experiment established in 25 localities in southern Sweden. A logistic regression approach was used to predict the probability and the HosmerLemeshow goodness-of-fit test to evaluate the fit. Diameter at breast height (DBH), quadratic mean DBH, thinning intensity, thinning quotient, basal area, number of stems per hectare, stand age, number of thinnings, and site index were used as explanatory variab

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5

Anyango, Emma, Joyce A. Obuoyo, and Boniface O. Oindo. "Influence of Thinning Regime on Woody Species Density and Abundance in Kimondi Forest, Nandi County, Kenya." East African Journal of Forestry and Agroforestry 8, no. 1 (2025): 324–35. https://doi.org/10.37284/eajfa.8.1.3330.

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A silvicultural regime refers to the planned sequence of treatments applied to a forest stand, which mainly includes pruning and thinning regimes. The latter is a silvicultural practice that is important for the management of forest growth, composition, structure, and health. Despite the ecological and silvicultural importance of thinning, its limited application in plantation forests has constrained the effective management of woody species density and abundance. Thus, the aim of this research was to assess the influence of the thinning regime on woody species density and abundance. This stud

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6

Igor, Štefančík. "Crown development of beech crop trees under different thinning regimes." Journal of Forest Science 63, No. 4 (2017): 173–81. http://dx.doi.org/10.17221/117/2016-jfs.

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Crop trees are the main bearers of qualitative and value production of the stands. Although the number and production of the mentioned trees are affected by various factors, crown development by means of the thinning regime can be considered as very significant. The paper aims at the comparison of crop trees in homogeneous beech (Fagus sylvatica Linnaeus) stands, which were managed by three different management or thinning regimes for a long period (ca. 50 years): (i) heavy thinning from below (C grade according to the German forest research institutes released in 1902), (ii) Štefančík’s free

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7

Reisinger, Thomas W. "A Simulation-Based Approach to Evaluating Commercial Thinning Decisions in Loblolly Pine Plantations." Southern Journal of Applied Forestry 9, no. 4 (1985): 211–16. http://dx.doi.org/10.1093/sjaf/9.4.211.

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Abstract Computer simulation techniques are described which evaluate the impact of various stand conditions, management regimes, harvesting systems, and future market scenarios on current thinning decisions in pine plantations. Four simulation programs (PTAEDAR, PTAEDA, GENMAC, and HSS) were linked to predict tree growth/stand development and to model mechanized thinnings and final harvests. Simulation results were then combined with an investment analysis program to calculate the net present value of each strategy. An example analysis for a "typical" loblolly pine (Pinus taeda) plantation is

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8

Slodičák, M., and J. Novák. "Norway spruce thinning experiment Polom (Eastern Bohemia) after 22 years of observation." Journal of Forest Science 50, No. 1 (2012): 1–10. http://dx.doi.org/10.17221/4594-jfs.

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Effects of thinning were studied in an air-polluted young stand of Norway spruce on Polom series in the Orlick&eacute; hory Mts. (North-Eastern part of the Czech Republic) founded in 1980 in 15 years old spruce stand established by planting with density of 3,500&ndash;4,000 trees per hectare in 1965. The stand lies at an elevation of 800&nbsp;m in the 6<sup>th</sup> beech with spruce forest vegetation zone. The expected survival of the experimental stand at the beginning of experiments was 40 years (air pollution danger zone B). The thinning experiment is based on a cla

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9

Resquin, Fernando, Karen Baez, Sofia de Freitas, Diego Passarella, Ana Paula Coelho-Duarte, and Cecilia Rachid-Casnati. "Impact of Thinning on the Yield and Quality of Eucalyptus grandis Wood at Harvest Time in Uruguay." Forests 15, no. 5 (2024): 810. http://dx.doi.org/10.3390/f15050810.

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Understanding how thinning strategies impact wood quality and quantity for different purposes is of interest, given that plantation management is often based on parameters that require validation under varying growth conditions. Planted forests for solid purposes in the northern region of Urugay, western Argentina and South of Brazil are usually managed in initial stockings ranging from 800 to 1200 trees·ha−1 depending on the use of clones or seeds. Subsequent thinnings are applied (at plantation ages varying from 3 to 11 years) up to final stockings of around 200 trees·ha−1. This study evalua

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10

Franklin, Carlyle, Dennis W. Hazel, Randal R. Rucker, and Gary D. Kronrad. "Thinning and Harvesting Regimes for Yellow-Poplar." Southern Journal of Applied Forestry 14, no. 3 (1990): 101–3. http://dx.doi.org/10.1093/sjaf/14.3.101.

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Abstract Grade 1 yellow-poplar logs were recently selling for $150/mbf, three times the price for grade 2 logs in North Carolina. A computerized stand development model was used to examine the profitability of thinning and holding yellow-poplar stands for increased diameter and grade. Analyses were done over wide ranges in stand age, site quality, and stocking, at 5% and 10% discount rates. At a 5% discount rate, the maximum net present stumpage value was obtained by thinning in most regimes. Lower stand age, higher initial stocking, and higher site indices favored thin-clearcut regimes over r

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11

Štefančík, I. " Growth characteristics of oak (Quercus petraea [Mattusch.] Liebl.) stand under different thinning regimes." Journal of Forest Science 58, No. 2 (2012): 67–78. http://dx.doi.org/10.17221/79/2011-jfs.

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In the paper, selected quantitative characteristics of 57-year-old oak pole stage stand were analysed on plots with different thinning regimes at its establishment. Six thinning treatments were performed in an interval of 8, 14 and/or 5 years. We applied the method of target (crop) trees on three partial plots and method of promising trees on one plot with different intensity of releasing the trees of selective quality (promising and target trees). The results of both methods were compared with the control (untreated plots). Preliminary outcomes suggested that from the quantitative aspects the

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12

Guiterman, Christopher H., Aaron R. Weiskittel, and Robert S. Seymour. "Influences of Conventional and Low-Density Thinning on the Lower Bole Taper and Volume Growth of Eastern White Pine." Northern Journal of Applied Forestry 28, no. 3 (2011): 123–28. http://dx.doi.org/10.1093/njaf/28.3.123.

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Abstract Throughout the northeastern United States, thinning is a common management practice in stands of eastern white pine (Pinus strobus L.), but foresters lack clear information as to whether conventional B-line or low-density thinning will best achieve their growth and financial objectives. Conventional management consists primarily of light crown thinning, whereas low-density management uses heavy crown thinning to isolate selected crop trees. To better inform silviculturists of the effects of these thinning regimes on volume growth and taper of white pine, we compared the lower bole tap

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13

Njoka, E. M., M. M. Muraya, and M. Okumu. "Plant density and thinning regime effect on maize (Zea mays) grain and fodder yield." Australian Journal of Experimental Agriculture 44, no. 12 (2004): 1215. http://dx.doi.org/10.1071/ea03015.

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Maize (Zea mays L.) plant density is an important management practice for successful grain and forage production. The objective of this study was to determine the most suitable maize seeding and time of thinning maize as fodder in grain maize crops. Previously the focus in this area has been on grain and silage production, and consequently information on the production of fodder in grain maize crops is limited. This study therefore aims to investigate the growth of high density maize for fodder production through thinning and subsequent grain yield. A plant density experiment in randomised com

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14

Apiolaza, Luis A., and Dorian J. Garrick. "Breeding objectives for three silvicultural regimes of radiata pine." Canadian Journal of Forest Research 31, no. 4 (2001): 654–62. http://dx.doi.org/10.1139/x00-200.

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A generic vertically integrated firm, comprising a production forest, a sawmill, and a pulp mill was modelled under three silvicultural regimes: direct to pulp, intermediate (includes production thinning), and intensive (includes production thinnings and pruning). The harvest age traits included in the breeding objective were total volume (m3/ha) and average wood density (kg/m3). Economic values for each trait were calculated as the difference in discounted profit for a unit marginal increase of volume or density, and expressed as relative weights to facilitate comparisons between the objectiv

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15

Peitz, David G., Philip A. Tappe, Michael G. Shelton, and Michael G. Sams. "Deer Browse Response to Pine-Hardwood Thinning Regimes in Southeastern Arkansas." Southern Journal of Applied Forestry 23, no. 1 (1999): 16–20. http://dx.doi.org/10.1093/sjaf/23.1.16.

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Abstract Understanding relationships between stand thinning and browse production allows land managers to encourage both white-tailed deer (Odocoileus virginianus) browse production and timber production. In our study, browse biomass was determined before thinning and two and four growing seasons after thinning a 35 yr old natural loblolly pine-hardwood stand (initially 27 m2/ha of pine and 8 m2/ha of hardwood basal area). Combinations of 3 loblolly pine (15, 18, and 21 m2/ha) and 3 hardwood (0, 3.5, and 7 m2/ha) basal areas were replicated 3 times, resulting in a total of 27 0.08 ha plots. Un

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16

Linkevičius, Edgaras, Benas Šilinskas, Lina Beniušienė, Marius Aleinikovas, and Almantas Kliučius. "The Growing Dynamic of Pure Scots Pine Stands Using Different Thinning Regimes in Lithuania." Forests 14, no. 8 (2023): 1610. http://dx.doi.org/10.3390/f14081610.

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The aim of this study is to relate initial stand density and thinning intensity to tree diameter, height, and volume increment based on continuous 30-year observations in thinning experimental stands of Scots pine (Pinus sylvestris L.). The thinning experiments on Scots pine were established in 1990 and 1992, and the experimental model in each trial comprised five density variants: control and four plots with tree densities up to 3.0–4.4, 2.0–2.4, 1.0–1.2, and 0.5–0.6 thousand trees per hectare after the initial thinning. Since the establishment, only the dead trees were removed in control plo

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17

Tang, Jinyu, Sebastien Vincent-Bonnieu, and William R. Rossen. "Experimental Investigation of the Effect of Oil on Steady-State Foam Flow in Porous Media." SPE Journal 24, no. 01 (2018): 140–57. http://dx.doi.org/10.2118/194015-pa.

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Summary Foam flow in porous media without oil shows two regimes depending on foam quality (gas fractional flow). Complexity and limited data on foam/oil interactions in porous media greatly restrict understanding of foam in contact with oil. Distinguishing which regimes are affected by oil is key to modeling the effect of oil on foam. We report steady-state corefloods to investigate the effect of oil on foam through its effect on the two flow regimes. We fit the parameters of a widely used local-equilibrium (LE) foam model to data for concurrent foam/oil flow. This research provides a practica

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18

Arthaud, Greg J., and W. David Klemperer. "Optimizing high and low thinnings in loblolly pine with dynamic programming." Canadian Journal of Forest Research 18, no. 9 (1988): 1118–22. http://dx.doi.org/10.1139/x88-172.

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A four state-descriptor dynamic programming model was used to seek economically optimal thinning regimes for high and low thinning in loblolly pine (Pinustaeda L.). Given the assumptions of the study, low thinning generated higher present values than high thinning. Growth equations were estimated from data generated by a stochastic growth simulator. Reasons for the occurrence of slightly suboptimal solutions are discussed. The paper reviews situations in which the principle of optimality might be violated when thinning problems are being solved with forward recursion dynamic programming.

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19

Castrejón-Pita, José Rafael, Alfonso Arturo Castrejón-Pita, Sumeet Suresh Thete, et al. "Plethora of transitions during breakup of liquid filaments." Proceedings of the National Academy of Sciences 112, no. 15 (2015): 4582–87. http://dx.doi.org/10.1073/pnas.1418541112.

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Thinning and breakup of liquid filaments are central to dripping of leaky faucets, inkjet drop formation, and raindrop fragmentation. As the filament radius decreases, curvature and capillary pressure, both inversely proportional to radius, increase and fluid is expelled with increasing velocity from the neck. As the neck radius vanishes, the governing equations become singular and the filament breaks. In slightly viscous liquids, thinning initially occurs in an inertial regime where inertial and capillary forces balance. By contrast, in highly viscous liquids, initial thinning occurs in a vis

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20

Roon, David A., Jason B. Dunham, and Jeremiah D. Groom. "Shade, light, and stream temperature responses to riparian thinning in second-growth redwood forests of northern California." PLOS ONE 16, no. 2 (2021): e0246822. http://dx.doi.org/10.1371/journal.pone.0246822.

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Resource managers in the Pacific Northwest (USA) actively thin second-growth forests to accelerate the development of late-successional conditions and seek to expand these restoration thinning treatments into riparian zones. Riparian forest thinning, however, may impact stream temperatures–a key water quality parameter often regulated to protect stream habitat and aquatic organisms. To better understand the effects of riparian thinning on shade, light, and stream temperature, we employed a manipulative field experiment following a replicated Before-After-Control-Impact (BACI) design in three w

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21

Navarro-Cerrillo, Rafael M., Francisco J. Ruiz-Gómez, Jesús J. Camarero, et al. "Long-Term Carbon Sequestration in Pine Forests under Different Silvicultural and Climatic Regimes in Spain." Forests 13, no. 3 (2022): 450. http://dx.doi.org/10.3390/f13030450.

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Proactive silviculture treatments (e.g., thinning) may increase C sequestration contributing to climate change mitigation, although, there are still questions about this effect in Mediterranean pine forests. The aim of this research was to quantify the storage of biomass and soil organic carbon in Pinus forests along a climatic gradient from North to South of the Iberian Peninsula. Nine experimental Pinus spp trials were selected along a latitudinal gradient from the pre-Pyrenees to southern Spain. At each location, a homogeneous area was used as the operational scale, and three thinning inten

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22

Amateis, Ralph L. "Modeling Response to Thinning in Loblolly Pine Plantations." Southern Journal of Applied Forestry 24, no. 1 (2000): 17–22. http://dx.doi.org/10.1093/sjaf/24.1.17.

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Abstract Data from a thinning study established in loblolly pine (Pinus taeda L.) plantations at different locations in the southeastern United States were used to develop response models for basal area and survival following thinning. The nonlinear regression models predict total cumulative response as a function of stand and site conditions at time of thinning, thinning intensity, and elapsed time since thinning. Variables expressing thinning intensity that were significant predictors of response included before and after thinning basal areas and number of trees. The models suggest that init

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23

Hotvedt, James E., and Thomas J. Straka. "Using Residual Values to Analyze the Economics of Southern Pine Thinning." Southern Journal of Applied Forestry 11, no. 2 (1987): 99–106. http://dx.doi.org/10.1093/sjaf/11.2.99.

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Abstract Thinning options on southern pine plantations are often evaluated under the implicit assumption that forestland is treated as a profit center, with stumpage as the final product. Stumpage values might not adequately reflect the end-product content and value of trees, however. An indirectmethod, the residual value approach, is an alternative stumpage valuation technique and is illustrated in this paper. This approach values an end product of stumpage (e.g., lumber, sawlogs, or chips) and subtracts conversion and handling costs to arrive at an estimate of stumpage value. Consequently,re

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24

Ribeiro, Andressa, Carolina Souza Jarochinski e. Silva, Antonio Carlos Ferraz Filho, and José Roberto Soares Scolforo. "Financial and risk analysis of African mahogany plantations in Brazil." Ciência e Agrotecnologia 42, no. 2 (2018): 148–58. http://dx.doi.org/10.1590/1413-70542018422026717.

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ABSTRACT Wood demand is increasing in quality and quantity, and economic studies are fundamental to analyze the feasibility of forest projects. These researches are in line with management and silvicultural studies, highlighting growth and yield modeling. This paper proposes an economic evaluation of implementation of African mahogany stands in Brazil under different perspectives of forest management. Data are from plantations ranging from 1.1 to 15 years old in different Brazilian regions. Financial analysis was undertaken using Net Present Value (NPV), Internal Rate of Return (IRR) and Equal

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25

Мурзинов, Yuriy Murzinov, Малышев, Vladimir Malyshev, Петровский, and Vladislav Petrovskiy. "Modeling indicators of the growth of even-aged pine plantations with thinning in different types of forest conditions." Forestry Engineering Journal 4, no. 3 (2014): 21–28. http://dx.doi.org/10.12737/6264.

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Creating forest plantations, used in these soil preparation techniques, agricultural activities, as well as the selection of the optimum species composition and subsequent silvicultural treatments are developed in accordance with different types of forest conditions. These conditions greatly affect the overall performance and progress of growth stands. The results of numerical analysis and the use of tables of plantation growth of Scots pine growing in various types of forest conditions (A2, B2) are given, reflecting changes in the stock of stem wood with age under the influence of thinning. A

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26

Dušek, David, Jiří Novák, Dušan Kacálek, and Marian Slodičák. "Norway spruce production and static stability in IUFRO thinning experiments in the Czech Republic." Journal of Forest Science 67, No. 4 (2021): 185–94. http://dx.doi.org/10.17221/188/2020-jfs.

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Despite recent issues, Norway spruce remains the most important commercial tree species which might be demanded henceforth for its broadly utilizable wood. Even before foresters faced both the bark beetle outbreaks and spruce decline, spruce monospecific stands were known to be prone also to other damage due to snow and wind. On this basis, measures that help prevent such failures were looked for, which resulted in the establishment of international IUFRO experimental series focused on impacts of different thinning regimes on stability and production of spruce stands. The thinning treatments d

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27

Montero, G., I. Cañellas, and R. Ruíz-Peinado. "Growth and Yield Models for Pinus halepensis Mill." Forest Systems 10, no. 1 (2002): 179–201. http://dx.doi.org/10.5424/720.

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Growth and yield models of silviculture applied to four site indices have been drawn up. The data were obtained in 72 plots, installed in 1965 in man made stands of Pinus halepensis Mill., and inventoried in 1965, 1975, 1980, 1988 y 1999. The site index was defined as the top height at age 80 and models were adjusted using the Richards function, obtaining four site qualities: 20, 17, 14 and 11. Following this, silvicultural production models, including two different thinning regimes, were developed for the two higher site qualities sites, with more productive interest (20 and 17) using a simul

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28

Anyango, Emma, Joyce A. Obuoyo, and Boniface O. Oindo. "Influence of Thinning and Pruning Regime on Woody Species Density and Abundance." International Journal of Research and Innovation in Social Science VIII, IIIS (2024): 3471–91. http://dx.doi.org/10.47772/ijriss.2024.803251s.

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The revival of forests is gaining prominence, with a focus on common tree species. However, the most affected species by fragmentation are the exotic woody species; therefore attention to forest silvicultural practices is essential. Kenya is acknowledged as one of the nations that value its forest environment greatly, although there are still restrictions on the application of silvicultural regimes there. This is a result of the continued strong demand for wood. It is anticipated that silvicultural regimes would eclipse Kenya’s fragmentation tactics. Thus, the goal of this research was to eval

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29

Hou, Lin, Shan Sun, Liyan Liang, Ge Liang, and Luxi Jiang. "Effects of selective thinning and residue removal on ground layer structure and diversity in a mixed pine–oak stand of the Qinling Mountains, China." Australian Journal of Botany 65, no. 7 (2017): 485. http://dx.doi.org/10.1071/bt16233.

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Plant species in the forest ground layer are the main food resources for animals and other organisms in the Qinling Mountains, China. To optimise forest thinning programs, we examined how different selective thinning and thinning residue removal regimes influence ground layer diversity and cover. We explored these factors for 2 years in a mixed pine–oak stand. Results indicate the treatments resulted in an increase in the numbers of species, genus and family by 10, 10 and six, respectively, after 1 year thinning and by 14, 10 and four, respectively, after 2 years thinning, compared with the st

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30

Vollbrecht, G., and B. Bilde Jørgensen. "Modelling the incidence of butt rot in plantations of Piceaabies in Denmark." Canadian Journal of Forest Research 25, no. 12 (1995): 1887–96. http://dx.doi.org/10.1139/x95-205.

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An empirical model is presented to forecast the incidence of butt rot at the stand level. In addition, the impact of different thinning regimes and stump treatment on the incidence of butt rot was evaluated. The model is based on data from 166 permanent forest yield research plots of pure even-aged Norway spruce (Picea abies (L.) Karst.) plantations in Denmark, within which the incidence of butt rot at stump height in thinned trees has been recorded after each thinning since 1947. In total, 79 000 stumps from 895 thinnings were studied. Regression analyses were carried out with the incidence o

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31

Hunt, Steve, Shambu Dangal, and Sarita Shrestha. "Minimizing the Cost of Overstocking: Towards a Thinning Regime for Community - Managed Pine Plantations in the Central Hills of Nepal." Journal of Forest and Livelihood 1, no. 1 (2024): 11–13. http://dx.doi.org/10.3126/jfl.v1i1.59808.

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The authors assess the impact of stocking levels on the growth of Pinus Roxburghii and Pinus Patula which were planted in the two central hill districts of Nepal over the past two decades, and are generally overstocked due to conservative thinning practices. An analysis of more than 150 tress at different stocking levels showed that overstocking has reduced volume growth, and if thinning is delayed, this will be equivalent to a loss of over USD 200 per hectare per anum. To maximize income from such plantations, thinning regimes for the two species are also suggested.

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Fatehifar, Maryam, Alistair Revell, and Masoud Jabbari. "Non-Newtonian Droplet Generation in a Cross-Junction Microfluidic Channel." Polymers 13, no. 12 (2021): 1915. http://dx.doi.org/10.3390/polym13121915.

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A two-dimensional CFD model based on volume-of-fluid (VOF) is introduced to examine droplet generation in a cross-junction microfluidic using an open-source software, OpenFOAM together with an interFoam solver. Non-Newtonian power-law droplets in Newtonian liquid is numerically studied and its effect on droplet size and detachment time in three different regimes, i.e., squeezing, dripping and jetting, are investigated. To understand the droplet formation mechanism, the shear-thinning behaviour was enhanced by increasing the polymer concentrations in the dispersed phase. It is observed that by

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Tahvonen, Olli, Janne Rämö, and Mikko Mönkkönen. "Economics of mixed-species forestry with ecosystem services." Canadian Journal of Forest Research 49, no. 10 (2019): 1219–32. http://dx.doi.org/10.1139/cjfr-2018-0514.

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The Faustmann–Hartman setup is widely established for specifying the economics of forest values besides timber, but it is criticized as restrictive for capturing diversity values. We show that extending the model to cover diversity attributes, i.e., mixed species and internal heterogeneity within species, is not enough to overcome these restrictions. Additionally, it is necessary to extend forest harvesting regimes to cover thinning, continuous cover forestry, and the management of commercially useless trees. Restrictions in the Faustmann–Hartman setup are first shown analytically with optimiz

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Cain, Michael D., and Michael G. Shelton. "Effects of Alternative Thinning Regimes and Prescribed Burning in Natural, Even-Aged Loblolly–Shortleaf Pine Stands: 25 Year Results." Southern Journal of Applied Forestry 27, no. 1 (2003): 18–29. http://dx.doi.org/10.1093/sjaf/27.1.18.

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Abstract In southeastern Arkansas, pine growth was monitored for 19 yr after mechanically strip thinning a dense, naturally regenerated, even-aged stand of 6-yr-old loblolly pines (Pinus taeda L.) and shortleaf pines (P. echinata Mill.) that averaged 16,600 stems/ac. Prescribed winter burns were conducted biennially between ages 9 and 20 yr and at 24 yr. Commercial thinnings during the 17th and 23rd growing seasons left a residual stocking of either 85 ft2/ac or 200 crop trees/ac (75 ft2/ac) in merchantable-sized (> 3.5 in. dbh) pines on plots that were precommercially thinned and on plots

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FERRAZ FILHO, ANTONIO C., BLAS MOLA-YUDEGO, JOSÉ R. GONZÁLEZ-OLABARRIA, and JOSÉ ROBERTO S. SCOLFORO. "Thinning regimes and initial spacing for Eucalyptus plantations in Brazil." Anais da Academia Brasileira de Ciências 90, no. 1 (2018): 255–65. http://dx.doi.org/10.1590/0001-3765201720150453.

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Kabzems, Richard, Philip G. Comeau, Cosmin N. Filipescu, Bruce Rogers, and Amanda F. Linnell Nemec. "Creating boreal mixedwoods by planting spruce under aspen: successful establishment in uncertain future climates." Canadian Journal of Forest Research 46, no. 10 (2016): 1217–23. http://dx.doi.org/10.1139/cjfr-2015-0440.

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Planting white spruce (Picea glauca (Moench) Voss) under established aspen (Populus tremuloides Michx.) stands has substantial potential for regenerating mixedwood ecosystems in the western Canadian boreal forest. The presence of an aspen overstory serves to ameliorate frost and winter injury problems and suppresses understory vegetation that may compete with white spruce. Under future climatic regimes with more frequent and severe drought episodes, underplanting may be a cost-effective strategy for lowering the risk of mortality in mixedwood regeneration. We examine the growth of white spruce

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Guan, Biing T., Shih-Hao Weng, Shing-Rong Kuo, Tsung-Yi Chang, Hsin-Wu Hsu, and Chieh-Wen Shen. "Analyzing the effects of stand thinning on microclimates with semiparametric smoothing splines." Canadian Journal of Forest Research 36, no. 7 (2006): 1641–48. http://dx.doi.org/10.1139/x06-057.

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Monitoring the effects of stand thinning on microclimates is an integral part of any thinning experiment. It is through its modifications of microclimates that thinning alters important ecological processes. An efficient analysis of microclimate-monitoring data should address both the effects of thinning regimes on, and the temporal response trends of, microclimates. Probably because of the difficulties in modeling temporal trends parametrically, an examination of the existing literature on thinning showed that only a few studies have attempted to address the second aspect. We propose the use

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Yue, Xiaofeng, Yanlun Ju, Yulin Fang, and Zhenwen Zhang. "Transcriptomics Integrated with Metabolomics Reveals the Effect of Cluster Thinning on Monoterpene Biosynthesis in ‘Muscat Hamburg’ Grape." Foods 10, no. 11 (2021): 2718. http://dx.doi.org/10.3390/foods10112718.

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Monoterpenes are crucial to floral and fruit aromas in grapes and wines. Cluster thinning is a common practice for improving grape quality. Using Vitis vinifera cv. Muscat Hamburg, the effects of three cluster-thinning regimes on the biosynthesis and accumulation of monoterpenes from véraison to harvest were investigated at the transcriptomics and targeted metabolomics levels. It was observed that more intense thinning produced higher concentrations of total monoterpenes, particularly in their bound forms. The numbers of differentially expressed genes among the three treatments were 193, 200,

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Morris, D. M., S. C. Hills, and C. Bowling. "Growth and form responses to pre-commercial thinning regimes in aerially seeded jack pine stands: 5th year results." Forestry Chronicle 70, no. 6 (1994): 780–87. http://dx.doi.org/10.5558/tfc70780-6.

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In 1986, a thinning trial was established in a 9-year-old jack pine stand near Dryden, Ontario. Four blocks consisting of five thinning regimes (1 m × 1 m, 1.5 m × 1.5 m, 2 m × 2 m, 2.5 m × 2.5 m, 3 m × 3 m) and a control plot were established using a randomized complete block design. Once thinned, a series of measurements were taken in 1986 and repeated in 1991 to determine growth and form responses. Results identified highly significant responses for DBH growth and individual stem volume growth. Height response did not vary among the spacing levels. Changes in crown dimensions and stem taper

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Schütz, Jean-Philippe. "Notre façon de conduire les éclaircies a évolué ces 50 dernières années: et pourquoi? (Essai)." Schweizerische Zeitschrift fur Forstwesen 166, no. 1 (2015): 2–8. http://dx.doi.org/10.3188/szf.2015.0002.

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Our approach to thinning has changed over the last 50 years: why? (Essay) Thinning methods and principles have always fluctuated between an approach based on moderate interventions, aimed at maintaining a sufficient stocking level (the so-called “volume effect”) and the liberation of crowns of a limited number of trees. Nowadays Schädelin's concept of selective thinning focused on trees with high potential for the future, based on the efficient removal of those competitors which cause the most interference, is widely accepted. However, as regards the intensity and strength of thinning there ar

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Fukumoto, Keiko, Tomohiro Nishizono, Fumiaki Kitahara, and Kazuo Hosoda. "Evaluation of Individual Distance-Independent Diameter Growth Models for Japanese Cedar (Cryptomeria japonica) Trees under Multiple Thinning Treatments." Forests 11, no. 3 (2020): 344. http://dx.doi.org/10.3390/f11030344.

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Understanding the tree growth process is essential for sustainable forest management. Future yields are affected by various forest management regimes such as thinning; therefore, accurate predictions of tree growth are needed under various thinning intensities. This study compared the accuracy of individual-level distance-independent diameter growth models constructed for different thinning intensities (thinning intensity-dependent multiple models: TDM model) against the model designed to include all thinning intensities (thinning intensity-independent single model: TIS model) to understand ho

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42

Chikumbo, Oliver. "Using Different Approaches to Approximate a Pareto Front for a Multiobjective Evolutionary Algorithm: Optimal Thinning Regimes forEucalyptus fastigata." International Journal of Forestry Research 2012 (2012): 1–27. http://dx.doi.org/10.1155/2012/189081.

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A stand-level, multiobjective evolutionary algorithm (MOEA) for determining a set of efficient thinning regimes satisfying two objectives, that is, value production for sawlog harvesting and volume production for a pulpwood market, was successfully demonstrated for aEucalyptus fastigatatrial in Kaingaroa Forest, New Zealand. The MOEA approximated the set of efficient thinning regimes (with a discontinuous Pareto front) by employing a ranking scheme developed by Fonseca and Fleming (1993), which was a Pareto-based ranking (a.k.a Multiobjective Genetic Algorithm—MOGA). In this paper we solve the

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Yoshimoto, A., H. Yanagihara, and M. Nomoto. "Carbon Sequestration and Optimal Thinning Regimes From Forest Stand Optimization Modeling." FORMATH 4 (2005): 71–91. http://dx.doi.org/10.15684/formath.04.004.

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Weng, Y. H., J. Grogan, and D. W. Coble. "Modeling Early Responses of Loblolly Pine Growth to Thinning in the Western Gulf Coastal Plain Region." Forest Science 66, no. 5 (2020): 623–33. http://dx.doi.org/10.1093/forsci/fxaa009.

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Abstract Growth response to thinning has long been a research topic of interest in forest science. This study presents the first 3–4 years of response of loblolly pine (Pinus taeda L.) growth to thinning at different intensities. Data were collected from the East Texas Pine Research Project’s region-wide loblolly pine thinning study, which covers a wide variety of stand conditions. Four treatments, light, moderate, and heavy thinning, respectively having 370, 555, and 740 residual trees per hectare after thinning, and an unthinned control, were included. Individual tree diameter at breast heig

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45

Tkach, Viktor, Oksana Tarnopilska, Volodymyr Luk’yanets, et al. "Density optimisation of pine plantations in the Left-Bank Steppe in ukraine." Folia Forestalia Polonica 66, no. 2 (2024): 104–17. http://dx.doi.org/10.2478/ffp-2024-0009.

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Abstract The paper presents the results of long-term research on different cultivation regimes for planted Scots pine (Pinus sylvestris L.) stands in the experiment initiated by B. Gavrylov in 1932 in the Left-Bank Steppe in Ukraine. The aim of the study is to identify the optimal density of planted pine stands that provides the largest growing stock at the age of 95 years. The study shows that it is possible to form highly productive pine stands by regulating their density within certain limits through their thinning. The results suggest that the intensity of thinning in young pine plantation

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Williams, Kathleen M. "Evaluation of Endothall and Ammonium Thiosulfate as Potential Bloom Thinning Compounds for `Delicious' and `Fuji' Apples." HortScience 33, no. 3 (1998): 497a—497. http://dx.doi.org/10.21273/hortsci.33.3.497a.

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Consistent cropping of apple under Pacific Northwest growing conditions depends on a reliable bloom-thinning compound. Although there are two commercially available bloom-thinning chemicals, performance of these chemicals is not always consistent. Research on two unregistered bloom thinning compounds, Endothall and ATS, has been ongoing for several years in commercial orchard blocks. In 1997, multiple applications of Endothall and ATS were tested on `Delicious' and `Fuji'. Endothall was applied at 1.0, 1.5 or 2.0 pints/100 gal per acre rates at 40% and 80% full bloom. Endothall averaged 19 to

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Pienaar, Leon V., Henry H. Page, and John W. Rheney. "Yield Prediction for Mechanically Site-Prepared Slash Pine Plantations." Southern Journal of Applied Forestry 14, no. 3 (1990): 104–9. http://dx.doi.org/10.1093/sjaf/14.3.104.

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Abstract Simultaneous yield prediction and projection equations are presented for both unthinned and thinned site-prepared slash pine plantations in the lower coastal plain of Georgia and north Florida. These equations were developed from permanent sample plot data representing different planting densities and thinning intensities, replicated at 29 locations throughout the region. An equation is also provided to estimate different solid wood product yields, thus providing information for a realistic evaluation of management regimes with different planting densities, with or without thinning. S

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Machado, Norton, Thiago Floriani Stepka, and Marcos Felipe Nicoletti. "SAMPLING USING THE BITTERLICH METHOD IN Pinus taeda L. PLANTATIONS WITH DISTINCT MANAGEMENT SYSTEMS." FLORESTA 53, no. 1 (2023): 089. http://dx.doi.org/10.5380/rf.v53i1.85482.

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The Bitterlich method was studied with multiple basal area factors (BAF) in 3 Pinus taeda L. plantations located in the Midwest of Santa Catarina, Brazil using different management regimes: without thinning (1344 trees.ha-1), with one thinning (789 trees.ha-1), and with two thinnings (475 trees.ha-1),. Using the parameters obtained from censuses, we sought to verify the data from different sample treatments for the variables V.ha-1, G.ha-1, N.ha-1 and “d” through a completely randomized design for each management regime and observing the precision obtained by the sampling error and the accurac

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Wang, Weifeng, Changhui Peng, Daniel D. Kneeshaw, et al. "Modeling the effects of varied forest management regimes on carbon dynamics in jack pine stands under climate change." Canadian Journal of Forest Research 43, no. 5 (2013): 469–79. http://dx.doi.org/10.1139/cjfr-2012-0320.

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Climate change and its potential effects on ecosystems justify the need to implement forest management strategies that increase carbon (C) sequestration. A process-based model, TRIPLEX-Management, was used to investigate how to increase C sequestration within managed jack pine (Pinus banksiana Lamb.) forests. The simulations included a constant climate scenario and two climate change scenarios generated from the Coupled Global Climate Model (CGCM 3.1). A total of 36 forest management scenarios (a control where no forest management occurred, five varied rotation length harvesting-only regimes,

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Karlsson, Kjell, and Lennart Norell. "Predicting the future diameter of stems in Norway spruce stands subjected to different thinning regimes." Canadian Journal of Forest Research 35, no. 6 (2005): 1331–41. http://dx.doi.org/10.1139/x05-058.

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The future diameter of stems in even-aged Norway spruce (Picea abies (L.) Karst.) stands subjected to different thinning regimes was modelled, using data from a thinning experiment established in 25 localities in southern Sweden. Separate models were developed for stands thinned from below, stands thinned from above, and unthinned stands. A bivariate approach was used to construct the models, based on DBH data from the initial stand and from the same trees at future points in time. The approach entails that the dependency between initial and future DBHs can be directly used to predict the futu

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