Forestry Engineering Journal最新文献

{"title":"The effect of the individual seed mass of Negorelskaya variety Scots pine (Pinus sylvestris L.) on 30-day germination in 40-cell SideSlit growing containers","authors":"Arthur Novikov, Siarhei Rabko, Tatyana Novikova, E. Petrishchev","doi":"10.34220/issn.2222-7962/2023.2/4","DOIUrl":"https://doi.org/10.34220/issn.2222-7962/2023.2/4","url":null,"abstract":"The seeds germination of the Scots pine (Pinus sylvestris L.) is an important stage of the tree's life cycle and determines the subsequent productivity and survival, ultimately affecting the composition of the plant community. Germination is related to various biological characteristics of seeds, including individual seed mass. The amount of endosperm nutrients contained in sound seeds can determine the energy available for germination. Experimental evidence of the influence of individual seed mass on germination is still quite small. To test the technology of planting material production with a closed root system, taking into account the individual spectrometric and morphometric features of the Negorelskaya variety for each varietal seed of the Scots pine (P. sylvestris L.), three random sets of 400 de-winged seeds (N = 1200) were sown manually in 40-mesh SideSlit containers of an automated forest nursery. To test the hypothesis about the influence of the individual seed mass of the Scots pine (P. sylvestris L.) varieties \"Negorelskaya\" on the indicators of its germination in SideSlit containers on the 30th day, a single-factor analysis of variance was used with a check of uniformity according to the Levene's criterion and a posteriori LSD test of averages. The individual mass of the sown seeds varied from 1.0 to 13.3 mg (m ± SD | 60.1 ± 17.5 mg). The average values of the germination index of the seeds of Negorelskaya variety Scots pine (P. sylvestris L.) on day 30 in the volume of 6,8,12,16,18,26 SideSlit containers statistically (Levene's criterion 6.35, p = 1.98e-22; ANOVA F-criterion 1.291, p = 0.0139; a posteriori criterion LSD p < 0.05) differ from the indicator in 2,7,10,11,13,19,22,24,26,27,29 containers. The average values of the individual mass of 942 seeds germinated on the 30th day in the cells of SideSlit containers of the automated forest nursery statistically (Levene's criterion 11.317; p = 0.000792; ANOVA F-criterion 12.098; p = 0.000523) differ from the average values of the individual weight of the ungrown 258 seeds of the Negorelskaya variety Scots pine (P. sylvestris L.). In the future, this seed germination on day 50 in SideSlit containers and comprehensive quality indicators of the seedlings, including DQI and RQI, will be studied.","PeriodicalId":12425,"journal":{"name":"Forestry Engineering Journal","volume":"2021 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-09-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135535269","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Software for managing of maintenance and repair system of forest machines: assessment of applicability","authors":"Anatoliy Zaikin, Vladimir Sivakov, Tatyana Novikova, V. Zelikov, Vladimir Stasyuk, Aleksey Chuykov","doi":"10.34220/issn.2222-7962/2023.2/6","DOIUrl":"https://doi.org/10.34220/issn.2222-7962/2023.2/6","url":null,"abstract":"Modern enterprises of the forest complex are a sphere of production, in which information technologies are increasingly being introduced to increase efficiency. To improve the efficiency of maintenance and repair of forest machines for forestry and forestry industries, it is necessary to evaluate the possibility of using specialized software in forestry and logging industries. To compare the functionality and deployment capabilities, various programs of domestic and foreign manufacturers are considered, used both for automating repair work and for managing maintenance and repair. A comparative assessment of the similarities and differences of software products based on cluster analysis of binary data interpreted by the method of intergroup relations using the Jac-card measure is carried out. Due to the specifics of forestry enterprises (forest machines are located at a consid-erable distance from the service base), in order to monitor the technical condition, it is necessary that forest ma-chines be equipped with a diagnostic system and data transmission facilities. When choosing a specific software, it is necessary to rely on such parameters as the size of the enterprise of the forest complex, its needs, financial capabilities. The software should be integrated into a single information space that allows the use of digital twin’s technology.","PeriodicalId":12425,"journal":{"name":"Forestry Engineering Journal","volume":"19 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-09-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135535437","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Static loading of the power hydraulic drive of the manipulator links of the timber transport machine in critical mode","authors":"Olga Dornyak, Ludmila Markova, Sergei Popikov, Pavel Tanchuk","doi":"10.34220/issn.2222-7962/2023.2/5","DOIUrl":"https://doi.org/10.34220/issn.2222-7962/2023.2/5","url":null,"abstract":"The safe and effective modes of operation of handling equipment of the manipulator type for the forest complex assume a mandatory horizontal position of the frame of the mobile technological machine. In unfavorable production conditions, a forest transport machine may find itself in a critical situation associated with the rotation of the manipulator's support frame relative to the horizon. Correction of this situation can be provided through the use of outriggers. This paper presents the results of a theoretical study of static loads that are characteristic of hydraulic cylinders of outriggers and other elements of the hydraulic manipulator of a forest transport machine with its various configurations. Technologies for loading, moving and unloading forest cargoes can be carried out using special equipment, subject to certain rules. The safe and effective operation modes of manipulator handling equipment assume a mandatory horizontal position of the support-turntable. In unfavorable production conditions, the wood transport machine may find itself in a critical situation related to the rotation of the support and turning frame of the manipulator relative to the horizon. Correction of such position can be insured by use of outriggers. This paper presents the theoretical study results of the static loads, which are characteristic for the hydraulic cylinder of outrigger and other elements of the hydraulic manipulator of a timber transport machine in its various configurations. Balance equations in generalized coordinates are used to describe the equilibrium conditions of the mechanical system under study, which includes a basic vehicle, outriggers, a boom, a handle with a telescopic extension, a grip device and hydraulic drives that ensure their functioning. The rotation angle of support-turning frame in vertical plane, the boom rotation angle, the handle rotation angle and extension of the telescopic part are selected as generalized coordinates. Analytical expressions are obtained for forces on rods of hydraulic cylinders and the working fluid pressure values in piston cavities of hydraulic cylinders in equilibrium state at different position of manipulator links. Calculations based on the obtained formulas can be used in designing technological modes of operation of timber transport machines for carrying out loading and unloading operations of cargoes with the possibility of bringing the support-turntable into a horizontal position.","PeriodicalId":12425,"journal":{"name":"Forestry Engineering Journal","volume":"36 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-09-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135536478","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Phenotypical and genetic breeding evaluation silver birch (Betula pendula ROTH) and downy birch (Betula pubescens EHRH.) ex situ and in vitro","authors":"Igor Isakov, Tatyana Tabatskaya, Natal'ya Vnukova, Olga Mashkina, Vyacheslav Mikhin, Zoran Govedar","doi":"10.34220/issn.2222-7962/2023.2/2","DOIUrl":"https://doi.org/10.34220/issn.2222-7962/2023.2/2","url":null,"abstract":"The results of a study of birch test cultures obtained by different methods of ex situ pollination and introduced into culture in vitro are presented. To identify the phenotypic, cultural and cytological characteristics of two birch species naturally growing in the Central Black Earth Region - silver birch (diploid) and downy birch (tetraploid), test cultures of seed origin F1 and F2 were specially created. The article presents data on phenotypic (growth in height in the juvenile and reproductive periods of ontogeny), genetic selection (seed propagation system) variability and some characteristics of the introduction of F1 seed progeny of breeding forms of local birch species into in vitro culture. To predict the growth characteristics of seed progeny of breeding forms of local birch species obtained by different methods of pollination - self-pollination and open pollination at different stages of ontogeny (at the age of 2 and 10 years), a statistical processing of the feature of growth in height of families was carried out using the rank Spearman's correlation coefficient ρ. Species specificity was shown in response to different pollination methods, morphogenic activity of self-fertile and self-sterile forms of these birch species on a nutrient medium ½ MC + 6-benzylaminopurine 1 mg/l, primary shoot formation of explants and regenerative capacity in these species, the nature of morphogenesis (formation of the main escape). For the polyploid species (downy birch), a higher level of self-fertility was established, as well as a more intensive growth of shoots in height than for drooping birch; primary explants in the former had a different character of morphogenesis (there was a joint initiation of the main shoot with adventitious ones) than in silver birch (formation of the main shoot), which indicates a greater adaptive potential for polyploid species and their greater opportunities for inclusion in genetic breeding experiments and obtaining valuable breeding forms.","PeriodicalId":12425,"journal":{"name":"Forestry Engineering Journal","volume":"18 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-09-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135536476","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Formation of the structural and functional organization of young stands of Scots pine (Pinus sylvestris L.) of mixed artificial and natural origin in the condi-tions of berry pine forests of and forb pine forests of the Middle Urals","authors":"Mariya Ermakova","doi":"10.34220/issn.2222-7962/2023.2/3","DOIUrl":"https://doi.org/10.34220/issn.2222-7962/2023.2/3","url":null,"abstract":"Restoration of forests, the study of the processes of formation of their structure and productivity, is currently one of the most urgent tasks. The features of the formation of 12-year-old forest plantations and the concomitant natural regeneration of Scots pine (Pinus sylvestris L.) were studied under the conditions of berry pine forest and forb pine forest of the Middle Urals, on trial plots established in accordance with the existing requirements. For each Scotch pine (Pinus sylvestris L.) tree, the diameter at the middle height and height were measured, and the volume of the trunk in the bark was calculated. The rank distribution of trees was carried out by calculating their reduction numbers, determining the amplitude of the reduction numbers and subsequent distribution into 5 main classes. In the 12th year after planting, the survival rate in the berry pine forest was 47.0%, and in the forb pine forest - 35.3%. In the berry pine forest, taking into account the concomitant natural regeneration of Scots pine (Pinus sylvestris L.), a pine forest of artificial and natural origin is being formed, and in the forb pine forest, a pine forest of natural and artificial origin is being formed. The process of natural renewal of Scotch pine (Pinus sylvestris L.) took place over several years. Scots pine (Pinus sylvestris L.) trees of natural origin are 2-7 years younger in biological age than trees of artificial origin. Pine trees of artificial origin in the berry pine forest significantly exceed the average diameter at the middle of the height, height and trunk volume of the same trees in the forb pine forest. Pine trees of natural origin in the berry pine forest are significantly superior in average diameter at the middle of the height to trees in the forb pine forest, but they are significantly inferior to them in the average trunk height and practically do not differ in the average volume of the tree trunk. Trees of artificial origin in terms of diameter at the middle of the height, height and volume of the trunk significantly exceed trees of natural origin both in the berry pine forest and in the mixed grass pine forest. The distribution of trees by diameter and height in young forests of artificial and natural origin, both in the berry pine forest and in the forb pine forest, is characterized by a distribution close to normal. The distribution of trees of artificial and natural origin in the berry pine forest and the forb pine forest in terms of trunk volume is distinguished by left-sided asymmetry and sharpness. When distributed by rank height classes, a significant reduction in the level of variability of biometric indicators is provided. However, in natural young stands, a very high level of variability in stem volume in the bark remains. Both in artificial and natural young stands, the main (86.3-97.5%) stock of trunk wood in the bark falls on trees of I-III height classes. In the forb pine forest, artificial and natural young stands had almos","PeriodicalId":12425,"journal":{"name":"Forestry Engineering Journal","volume":"101-102 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-09-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135536482","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Computer simulation of the recuperative crank mechanism for turning the column of the manipulator of a timber road train","authors":"Valeriy Posmetev, Vadim Nikonov, Viktor Posmetev, V. Zelikov, Petr Kolodiy","doi":"10.34220/issn.2222-7962/2023.2/9","DOIUrl":"https://doi.org/10.34220/issn.2222-7962/2023.2/9","url":null,"abstract":"The study is aimed at improving the efficiency of the hydraulic manipulators of timber-carrying road trains operating in difficult natural and climatic conditions. The relevance of the scientific direction is substantiated, aimed at reducing energy losses in the hydraulic drives of manipulators in the process of performing loading and unloading operations. The works of foreign scientists are analyzed, which made it possible to identify promising areas for improving the efficiency of hydraulic manipulators, including the development of more modern drives, increasing productivity, accuracy and automation of their control processes. In order to improve the energy efficiency, performance and reliability of hydraulic manipulators of timber road trains, the authors proposed a promising design of the column slewing mechanism with a crank drive. The study was based on mathematical and simulation modeling, numerical methods, as well as modern methods for obtaining and processing information with computer support. A mathematical model and a computer program for the operation of a hydraulic manipulator with a regenerative crank drive of the column slewing mechanism made it possible to estimate the recuperated energy and the swing amplitude of the transported load. When using a hydraulic manipulator equipped with the proposed crank drive, the boom length of which is on average 6 m, and the weight of the transported timber is 600 kg, the amount of energy that can be stored in the pneumohydraulic accumulator is about 1300 J. The angular unevenness of the crank drive is 23.6 % and 4.6 % when assessed in terms of recuperated energy and load swing amplitude, respectively. For a typical hydraulic manipulator with a boom length of 6 m, when braking the rotation of the column, the recuperation system allows to store from 0.39 to 2.59 kW with a load mass of 200 to 1400 kg, respectively, with an acceptable load swing amplitude, respectively, from 0.2 to 0.48 m. The obtained results will be used as recommendations for the purpose of finalizing the proposed crank drive of the rotary device of the hydraulic manipulator at the stage of its design.","PeriodicalId":12425,"journal":{"name":"Forestry Engineering Journal","volume":"22 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-09-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135535264","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"The negative impact factor analysis to the environment from logging production on the North-West region of Russian Federation","authors":"Elena Grafova, Vladimir Syunev, Vyacheslav Gorbach","doi":"10.34220/issn.2222-7962/2023.2/1","DOIUrl":"https://doi.org/10.34220/issn.2222-7962/2023.2/1","url":null,"abstract":"Logging operations and timber transportation have a negative impact to natural and natural-anthropogenic&#x0D; environmental objects. Accounting, evaluation and forecasting of negative impact types will allow rational planning of&#x0D; technological logging operations. The negative impact degree data will allow assessing the total damage to&#x0D; environmental objects and, taking into account the loads of a particular work types provide for a set of protective&#x0D; measures adequate to the corresponding impact degree. The impact degree of types of logging activities to the&#x0D; environment was determined using the method of expert assessments. The variability of the nature and significance of&#x0D; the technogenic impact from logging and removal of wood was studied by the method of principal components. The&#x0D; generalized list of types of negative impact is ranked in the direction of decreasing degree as follows: pollution of water&#x0D; runoff and soils by leaks of fuels and lubricants, changes in biodiversity, damage to forest stands, destruction and&#x0D; pollution of soils, air pollution with chemical impurities, wastewater discharges into water bodies, landfill of domestic&#x0D; waste and discharge of effluents into the soil. When assessing biodiversity, increased attention should be paid to the&#x0D; organization of household and auxiliary technological processes. They are characterized by medium loads, causing&#x0D; pollution of water and soil by domestic and industrial effluents, and the formation of landfills for domestic and&#x0D; industrial waste. The construction of forest roads and work on refueling, repair and maintenance of logging equipment&#x0D; in workshops and fuel filling stations contribute to the manifestation of atypical impacts in the form of water and soil&#x0D; pollution with oil products. The obtained theoretical substantiation must be supplemented with relevant data from field&#x0D; studies on the identified types of negative impacts. Based on the predicted values of the degree of negative impact on&#x0D; the environment, the authors develop a set of scientifically substantiated technical and technological solutions that&#x0D; increase environmental safety during logging operations","PeriodicalId":12425,"journal":{"name":"Forestry Engineering Journal","volume":"95 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-09-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134904330","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Analysis of disk working bodies of forest soil-cultivating implements","authors":"Sergey Malyukov, Mikhail Lysych, Leonid Bukhtoyarov, Evgeniy Pozdnyakov, Maksim Gnusov, Mikhail Shavkov, Aleksandr Petkov","doi":"10.34220/issn.2222-7962/2023.2/7","DOIUrl":"https://doi.org/10.34220/issn.2222-7962/2023.2/7","url":null,"abstract":"The designs of disk working bodies are analyzed and a variant of the developed combined tillage tool is presented. One of the main active working bodies is disc working bodies, which are mounted on various forestry and agricultural machinery: plows, seeders, harrows, etc. and are intended for processing forest areas during reforestation. Disk working bodies are classified, which are divided by type, purpose and design. Due to the fact that forest soils are flooded with roots, stumps, stones, and when carrying out reforestation work they need high-quality preparation, it is required to increase the number of passes through the cultivated territory. Disc working bodies from the moment of their creation continue to undergo improvements aimed at increasing efficiency, increasing strength characteristics, etc. Disc working bodies represented a wide range of design features, but in the subsequent range was concentrated on reducing traction resistance. A change in the design in the process of studying the working body led to the creation of cutouts of various geometric sizes, one of the positive characteristics was a decrease in the traction force required for cutting, crumbling the soil, as well as an increase in quality characteristics.","PeriodicalId":12425,"journal":{"name":"Forestry Engineering Journal","volume":"41 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-09-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135535438","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Internal friction investigation of the natural and compressed birch (Betula pendula Roth) wood","authors":"Aleksandr Russu, Vladimir Shamaev, Egor Razinkov, Andris Zimelis","doi":"10.34220/issn.2222-7962/2023.1/16","DOIUrl":"https://doi.org/10.34220/issn.2222-7962/2023.1/16","url":null,"abstract":"A method is proposed for approximating of the internal friction of wood based on the Boltzmann superposition principle, which describes the complex viscoelastic behavior of the system by a linear combination of components. Prepared samples of natural and modified wood, sawn from the stem part of drooping birch (Betula pendula ROTH) trees growing in the Khlevensky Forestry (52.184130, 39.110463, ASL 157m), were exposed to radial and tangential directions with ultrasound (frequency 24.5 kHz, exposure 0 -20 minutes, step 5 minutes) and pulsed magnetic field (strength - 0.3 T, exposure 0-2 minutes, step 0.5 minutes). Next, the internal friction of the samples was studied on an experimental setup using the logarithmic damping decrement based on free-bending vibrations. The absolute values of the dimensionless viscosity coefficient κ included in the model as the main structural parameter for samples of natural and modified wood were obtained at a significance level of p=0.95: for moisture content from 4.3 to 15; for ultrasound 4.6 to 20; for a pulsed magnetic field from 3.6 to 7.7. The absolute values of the dimensionless scaling factors μ for natural and modified wood samples range from 1.92 to 3.91. The highest approximation value was achieved when testing natural wood samples of silver birch (Betula pendula ROTH): R2=0.98 for the radial direction, the influence of the humidity factor, and R2=0.85 for the tangential direction, the influence of the ultrasonic factor, as well as for a sample of modified wood brand \"Destam\" in the radial direction R2=0.96, the influence of the factor of the pulsed magnetic field.","PeriodicalId":12425,"journal":{"name":"Forestry Engineering Journal","volume":"46 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-05-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"136215869","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Age differences of pine stands as a factor of harmonization of the system of forest management activities in ribbon forests of the Altai Krai","authors":"Aleksey Osipenko, Sergey Zalesov","doi":"10.34220/issn.2222-7962/2023.1/9","DOIUrl":"https://doi.org/10.34220/issn.2222-7962/2023.1/9","url":null,"abstract":"The ratio of the same- and uneven-aged pine forests in various types of ribbon forests in Altai Krai, as well as the patterns of forming natural pine plantations, is determined. This issue is important for the harmonization of the entire set of forest management activities in the study area. The research is based on the analysis of an electronic database that contains information on the forest fund of 11 forest districts in Altai Krai (more than 268 thousand stratums with a total area of 1014 thousand ha). With the help of queries using filters and summary tables, a sample of natural plantations with a predominance of Scotch pine (Pinus sylvestris L.) was obtained. For each plantation in the sample, the number of age generations and the distributions of the area of the same- and uneven-aged pine forests by forest districts, forest types, and quality classes were determined. Statistical data processing included cluster analysis and chi-squared test. Pine forests of natural origin in the study area consist mainly of 2-3 pine generations. The share of uneven-aged forest stands accounts for 79.6% of the area. Same-aged pine forests occupy 20.4% of the area. During the transition from damp to very dry growing conditions, the proportion of uneven-aged pine forests increases. In the future it is planned to improve the existing systems of improvement thinning in mature, declining stands of forest-steppes and ribbon forests in the Altai-Novosibirsk forest growing district considering the ratio of the same- and uneven-aged pine forests. The improvement of the system of forest management activities should be performed on a forest-typological basis in combination with the division of plantings into high- and low-quality.","PeriodicalId":12425,"journal":{"name":"Forestry Engineering Journal","volume":"216 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-05-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"136215873","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}