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Silvicultural Efficiency of the Thinning Efficiency of Pinus sylvestris L. Plantation in the Dry Subzone of Northern Kazakhstan Steppes

Yıl 2020, Cilt: 20 Sayı: 3, 220 - 228, 30.12.2020
https://doi.org/10.17475/kastorman.849517

Öz

Aim of study: Thinning efficiency after 18 years of cutting at the Scots pine (Pinus sylvestris L.) plantations, in the subzone of the dry grass steppe, were examined.
Area of study: On 45-year-old Scots pine plantations on the territory of the state enterprise "ZhasylAimak" in Nur-Sultan city in the Northern Kazakhstan.
Material and methods: The plantations were established by high density planting (13,300 seedlings/ha) of 2-year old seedlings. The planting was carried out on forest-suitable soils. To assess the silvicultural efficiency of the thinning in the plantation, the coefficient of growth tension or a complex estimated figure (CEF) was used.
Main results: The research confirm that Scots pine plantations can be established in the subzone of dry fescue feather-grass steppe (Festuca valesiaca-Stipetum capillatae Sillinger 1930). The maximum silvicultural effect of thinning was achieved with three steps. In the 1st step of the thinning of the forest, 10-15 years old trees are cut down. Trees with over-developed crown are also cut down. The 2nd step is made in 25-30 years with thinning intensity of 25% by stock. The 3rd step is made in 40-50 years in a uniform way.
Highlights: In the harsh climatic conditions of Northern Kazakhstan steppe, deciduous trees and shrubs begin to age and die much earlier than the long-lived Scots pine.

Kaynakça

  • Boczon, A., Dudzinska, M. & Kowalska, A. (2016). Effect of thinning on evaporation of Scots pine forest. Applied Ecology and Environmental Research, 14, 367-379.
  • Bonyad, A. (2006). Silvicultural thinning intensity effects on increasing the growth of planted loblolly pine (Pinus taeda L.) stands in Northern Iran. Taiwan Journal of Forest Science, 21(3), 317-326.
  • Bose, A. K., Weiskittel, A., Kuehne, C., Wagner, R. G., Turnblom, E. & Burkhart, H. E. (2018). Tree-level growth and survival following commercial thinning of four major softwood species in North America. Forest Ecology and Management, 427, 355-364.
  • Chibisov, G. A. (1992). Thinning of forest in the European North, silvicultural and biological bases and zonal typological programs. Thinning of forests in the European North, silvicultural and biological framework and zonal-typological program. St-P.: Synopsis of diss.dr.agr.sc., 41p.
  • Dancheva A.V. & Zalesov S.V. (2016). The use of an integrated assessment indicator in assessing the state of recreational pine forests in the Bayanaul State National Natural Park (BSNNP). Bulletin of the Altai State Agricultural University (Vestnik Altayskogo gosudarstvennogo agrarnogo universiteta), 7(141), 51-61.
  • Davydov, A. V. (1971). Forest thinning. - М., Timber Industry, 184p.
  • Ebel, A. V., Ebel, Y. I., Zalesov, S. V. & Ayan, S. (2019). The effects of different ıntensity of thinning on the development in Scots pine (Pinus sylvestris L.) stands in Kazakh Uplands. Alınteri J. of Agr. Sci., 34(2), 182-187.
  • Eker, M. & Ozcelik, R. (2017). Estimating recoverable fuel wood biomass from small diameter trees in brutian pine (Pinus brutia ten.) stands. Fresenius Environmental Bulletin, 25(12), 8286-8297.
  • Elfving, B. (2010). Natural mortality in thinning and fertilisation experiments with pine and spruce in Sweden. Forest Ecology and Management, 260 (3), 353-360.
  • Gavinet J., Vilagrosa A., Chirino E., Granados M., Vallejo R. & Prevosto B. (2015). Hardwood seedling establishment below Aleppo pine depends on thinning intensity in two Mediterranean sites. Annals of Forest Science. 72(8), 999-1008.
  • Giuggiola, A., Bugmann, H., Zingg, A., Dobbertin, M. & Rigling, A. (2013). Reduction of stand density increases drought resistance in xeric Scots pine forests. Forest Ecology and Management, 310, 827-835.
  • Hasenauer, H., Burkhart, H. E. & Amateis, R. L. (1997). Basal area development in thinned and unthinned loblolly pine plantations. Canadian Journal of Forest Research, 27(2), 265-271.
  • Iskakov S. I., Zhorabekova Z. T. & Yelemesov M. M. (2013). The current state of artificial pine plantations in the belt forests of the Irtysh region. Proceedings of the International Scientific-practical Conference "Development of a green economy and the preservation of biological diversity" in Schuchinsk Kazakhstan, 8-10 October 2013, 117-123.
  • Izuyminski, P. P. (1970). Influence of improvement felling on the growth of plantings. Forestry, 2, 23-26.
  • Jablonski, A. & Stempski, W. (2018). Damage to trees from wood extraction in motor-manual wood harvesting technologies in thinning in pine stands. Baltic Forestry, 24(2), 313-320.
  • Kabanov, S., Filatov, V., Eskov, D., Samsonov, E. & Zaigralova, G. (2018). Resistance of pure and mixed coniferous forest stands in the conditions of the southern forest steppe. Journal of Pharmaceutical Sciences and Research, 10, 964-968.
  • Kabanova, S., Rakhimzhanov, A. & Danchenko, M. (2017). The creation of green zone of astana city: history, current state and prospects. Forestry Engineering Journal, 6(2), 16-22.
  • Kazuhiko, M., Hajime S., Hiroyuki T., Hirokazu K. & Minoru F. (2013). Thinning effect on height and radial growth of Pinus thunbergii Parlat. trees with special reference to trunk slenderness in a matured coastal forest in Hokkaido, Japan. Journal of Forest Research, 18(6), 475-481.
  • Keles, S, Baskent, E. & Kadiogullari, A. (2009). Orman Amenajman Planlarının Simülasyon Tabanlı Planlanması: Kavramsal Çerçeve. Kastamonu University Journal of Forestry Faculty, 9(2), 136-145.
  • Lagergrena, F., Lankreijera, H., Kucerab, J., Ciencialac, E., Moldera, M. & Lindrotha, A. (2008). Thinning effects on pine-spruce forest transpiration in central Sweden. Forest Ecology and Management, 255(7), 2312–2323.
  • Makarenko, А. А. & Mukanov, B. M. (2002). Improvement felling in pine trees of Kazakhstan. Almaty: Bastau.
  • Mäkinen, H. & Isomäki, A. (2004). Thinning intensity and growth of Scots pine stands in Finland. Forest Ecology and Management, 201(2-3), 311-325.
  • Malenko, А. А. (1980). Influence of improvement felling on the number and fractional composition of defoliation (mortality). Shchuchinsk: KazSRIF, 78-81 p.
  • Melekhov, I. S. (2005). Forestry, textbook, 3-rd edition, revised and supplemented. Moscow state forest university, Moscow.
  • Mehtatalo, L., Peltola, H., Kilpelainen, A. & Ikonen, V. P. (2014). The response of basal area growth of scots pine to thinning: A longitudinal analysis of tree- specific series using a nonlinear mixed-effects model. Forest Science, 60(4), 636-644.
  • Paivinen, R. & Yli-Kojola, H. 1989. Permanent sample plots in large-area forest inventory. Silva Fenn, 23(22), 43-252.
  • Pamfilov, V. V. (1951). Influence of thinning plantations on physical and mechanical properties of wood at the southern border of the forest-steppe zone-Works of Bryansk forestry institute.
  • Ruano, I., Rodríguez-García, E. & Bravo, F. (2013). Effects of pre-commercial thinning on growth and reproduction in post-fire regeneration of Pinus halepensis Mill. Annals of Forest Science, 70(4), 357-366.
  • Sánchez-Salguero, R., Camarero, J. J., Dobbertin, M., Fernández-Cancio, Á., Vilà-Cabrera, A., Manzanedo, R. D. & Navarro-Cerrillo, R. M. (2013). Contrasting vulnerability and resilience to drought-induced decline of densely planted vs. natural rear-edge Pinus nigra forests. Forest Ecology and Management, 310, 956-967.
  • Sennov, S. N. (1977). Improvement felling of forests. - М.: Timber industry, 160p.
  • Sennov, S. N. (1984). Forest tending: ecological basis. - М., Timber industry, 128p.
  • Sennov, S. N. (1999). The results of 60 years’ observations of the natural dynamics of the forest- SPb: SPbSRIF, 98p.
  • Smirnov, N. T. (1970). Ten years’ experience of improvement felling in Ilmen Reserve- Sverdlovsk: The Ural forests and their management. 5, 171-175.
  • Sohn, J. A., Hartig, F., Kohler, M., Huss, J. & Bauhus, J. (2016). Heavy and frequent thinning promotes drought adaptation in Pinus sylvestris forests. Ecological Applications, 26(7) 2190-2205.
  • Timofeev, V.P. & Georgievski, N.P. (1957). Density and layering of forest stands as the condition of their productivity. Goslestehizdat.
  • Verschuyl, J., Riffell, S., Miller, D. & Wigley, T. B. (2011). Biodiversity response to intensive biomass production from forest thinning in North American forests - A meta-analysis. Forest Ecology and Management, 261(2) 221-232.
  • Yurtseven, I., Serengil, Y., Gökbulak, F., Şengönül, K., Ozhan, S., Kılıç, U., Uygur, B., & Ozçelik, M. S. (2018). Results of a paired catchment analysis of forest thinning in Turkey in relation to forest management options. Science of the Total Environment, 618, 785-792.
  • Zalesov, S. V. (1986). Increment felling in pine forests of southern taiga subzone of the Ural. Sverdlovsk; Diss. Cand. agr. sc. 215p.
  • Zalesov, S. V. (1988). Influence of increment felling on the weight and productivity of assimilation apparatus of pine. - Sverdlovsk; The Ural forests and their management. 14, 152-160.
  • Zalesov, S. V. & Luganski, N. A. (1989). Increment felling in pine forests of the Ural. Sverdlovsk. Publishing House of Ural University, 128p.
  • Zeide, B. (2001). Thinning and growth: A full turnaround. Journal of Forestry, 99(1), 20-26.
  • Zhang, S., Burkhart, H. E. & Amateis, R. L. (1997). The influence of thinning on tree height and diameter relationships in loblolly pine plantations. Southern Journal of Applied Forestry, 21(4), 199-205.
Yıl 2020, Cilt: 20 Sayı: 3, 220 - 228, 30.12.2020
https://doi.org/10.17475/kastorman.849517

Öz

Çalışmanın amacı: Step vejetasyonun kuru-alt bölgesindeki Sarıçam (Pinus sylvestris L.) plantasyonlarında aralamanın 18 yıl sonraki etkinliği incelenmiştir.
Çalışma alanı: Kuzey Kazakistan'ın Nur-Sultan şehrindeki “Zhasyl Aimak" devlet işletmesi arazisinin 45 yaşındaki sarıçam plantasyonları.
Materyal ve yöntem: Plantasyon, yüksek yoğunlukta dikilen (13300 fidan/ha) 2 yaşlı fidanlar ile tesis edildi. Dikim, uygun orman toprakları üzerinde gerçekleştirildi. Aralamanın, plantasyondaki silvikültürel etkinliğini değerlendirmek için büyüme gerilim katsayısı veya karmaşık tahmini rakam kullanılmıştır (CEF)
Temel sonuçlar: Araştırma sonuçları, Kuzey Kazakistan'ın kuru çayır bozkırlarının alt bölgesinde sarıçam plantasyonlarının oluşturulabileceğini teyid etmektedir. Aralamanın maksimum silvikültürel etkisi üç aşamada elde edilmiştir. Aralamanın 1. aşaması; aşırı tepe gelişimli ağaçlar ile 10-15 yıllık kuru-ölü ağaçların kesilmesidir. Aralamanın 2. adımı, 25-30 yaşlarında servetin %25’nin çıkarılmasıdır. 3. aşama ise 40-50 yaşlarında uniform bir şekilde yapılır.
Önemli vurgular: Kuzey Kazakistan’ın sert iklim koşullarında; yaprak döken ağaçlar ve çalılar uzun ömürlü sarıçamdan çok daha erken yaşlanmaya ve ölmeye başlarlar.

Kaynakça

  • Boczon, A., Dudzinska, M. & Kowalska, A. (2016). Effect of thinning on evaporation of Scots pine forest. Applied Ecology and Environmental Research, 14, 367-379.
  • Bonyad, A. (2006). Silvicultural thinning intensity effects on increasing the growth of planted loblolly pine (Pinus taeda L.) stands in Northern Iran. Taiwan Journal of Forest Science, 21(3), 317-326.
  • Bose, A. K., Weiskittel, A., Kuehne, C., Wagner, R. G., Turnblom, E. & Burkhart, H. E. (2018). Tree-level growth and survival following commercial thinning of four major softwood species in North America. Forest Ecology and Management, 427, 355-364.
  • Chibisov, G. A. (1992). Thinning of forest in the European North, silvicultural and biological bases and zonal typological programs. Thinning of forests in the European North, silvicultural and biological framework and zonal-typological program. St-P.: Synopsis of diss.dr.agr.sc., 41p.
  • Dancheva A.V. & Zalesov S.V. (2016). The use of an integrated assessment indicator in assessing the state of recreational pine forests in the Bayanaul State National Natural Park (BSNNP). Bulletin of the Altai State Agricultural University (Vestnik Altayskogo gosudarstvennogo agrarnogo universiteta), 7(141), 51-61.
  • Davydov, A. V. (1971). Forest thinning. - М., Timber Industry, 184p.
  • Ebel, A. V., Ebel, Y. I., Zalesov, S. V. & Ayan, S. (2019). The effects of different ıntensity of thinning on the development in Scots pine (Pinus sylvestris L.) stands in Kazakh Uplands. Alınteri J. of Agr. Sci., 34(2), 182-187.
  • Eker, M. & Ozcelik, R. (2017). Estimating recoverable fuel wood biomass from small diameter trees in brutian pine (Pinus brutia ten.) stands. Fresenius Environmental Bulletin, 25(12), 8286-8297.
  • Elfving, B. (2010). Natural mortality in thinning and fertilisation experiments with pine and spruce in Sweden. Forest Ecology and Management, 260 (3), 353-360.
  • Gavinet J., Vilagrosa A., Chirino E., Granados M., Vallejo R. & Prevosto B. (2015). Hardwood seedling establishment below Aleppo pine depends on thinning intensity in two Mediterranean sites. Annals of Forest Science. 72(8), 999-1008.
  • Giuggiola, A., Bugmann, H., Zingg, A., Dobbertin, M. & Rigling, A. (2013). Reduction of stand density increases drought resistance in xeric Scots pine forests. Forest Ecology and Management, 310, 827-835.
  • Hasenauer, H., Burkhart, H. E. & Amateis, R. L. (1997). Basal area development in thinned and unthinned loblolly pine plantations. Canadian Journal of Forest Research, 27(2), 265-271.
  • Iskakov S. I., Zhorabekova Z. T. & Yelemesov M. M. (2013). The current state of artificial pine plantations in the belt forests of the Irtysh region. Proceedings of the International Scientific-practical Conference "Development of a green economy and the preservation of biological diversity" in Schuchinsk Kazakhstan, 8-10 October 2013, 117-123.
  • Izuyminski, P. P. (1970). Influence of improvement felling on the growth of plantings. Forestry, 2, 23-26.
  • Jablonski, A. & Stempski, W. (2018). Damage to trees from wood extraction in motor-manual wood harvesting technologies in thinning in pine stands. Baltic Forestry, 24(2), 313-320.
  • Kabanov, S., Filatov, V., Eskov, D., Samsonov, E. & Zaigralova, G. (2018). Resistance of pure and mixed coniferous forest stands in the conditions of the southern forest steppe. Journal of Pharmaceutical Sciences and Research, 10, 964-968.
  • Kabanova, S., Rakhimzhanov, A. & Danchenko, M. (2017). The creation of green zone of astana city: history, current state and prospects. Forestry Engineering Journal, 6(2), 16-22.
  • Kazuhiko, M., Hajime S., Hiroyuki T., Hirokazu K. & Minoru F. (2013). Thinning effect on height and radial growth of Pinus thunbergii Parlat. trees with special reference to trunk slenderness in a matured coastal forest in Hokkaido, Japan. Journal of Forest Research, 18(6), 475-481.
  • Keles, S, Baskent, E. & Kadiogullari, A. (2009). Orman Amenajman Planlarının Simülasyon Tabanlı Planlanması: Kavramsal Çerçeve. Kastamonu University Journal of Forestry Faculty, 9(2), 136-145.
  • Lagergrena, F., Lankreijera, H., Kucerab, J., Ciencialac, E., Moldera, M. & Lindrotha, A. (2008). Thinning effects on pine-spruce forest transpiration in central Sweden. Forest Ecology and Management, 255(7), 2312–2323.
  • Makarenko, А. А. & Mukanov, B. M. (2002). Improvement felling in pine trees of Kazakhstan. Almaty: Bastau.
  • Mäkinen, H. & Isomäki, A. (2004). Thinning intensity and growth of Scots pine stands in Finland. Forest Ecology and Management, 201(2-3), 311-325.
  • Malenko, А. А. (1980). Influence of improvement felling on the number and fractional composition of defoliation (mortality). Shchuchinsk: KazSRIF, 78-81 p.
  • Melekhov, I. S. (2005). Forestry, textbook, 3-rd edition, revised and supplemented. Moscow state forest university, Moscow.
  • Mehtatalo, L., Peltola, H., Kilpelainen, A. & Ikonen, V. P. (2014). The response of basal area growth of scots pine to thinning: A longitudinal analysis of tree- specific series using a nonlinear mixed-effects model. Forest Science, 60(4), 636-644.
  • Paivinen, R. & Yli-Kojola, H. 1989. Permanent sample plots in large-area forest inventory. Silva Fenn, 23(22), 43-252.
  • Pamfilov, V. V. (1951). Influence of thinning plantations on physical and mechanical properties of wood at the southern border of the forest-steppe zone-Works of Bryansk forestry institute.
  • Ruano, I., Rodríguez-García, E. & Bravo, F. (2013). Effects of pre-commercial thinning on growth and reproduction in post-fire regeneration of Pinus halepensis Mill. Annals of Forest Science, 70(4), 357-366.
  • Sánchez-Salguero, R., Camarero, J. J., Dobbertin, M., Fernández-Cancio, Á., Vilà-Cabrera, A., Manzanedo, R. D. & Navarro-Cerrillo, R. M. (2013). Contrasting vulnerability and resilience to drought-induced decline of densely planted vs. natural rear-edge Pinus nigra forests. Forest Ecology and Management, 310, 956-967.
  • Sennov, S. N. (1977). Improvement felling of forests. - М.: Timber industry, 160p.
  • Sennov, S. N. (1984). Forest tending: ecological basis. - М., Timber industry, 128p.
  • Sennov, S. N. (1999). The results of 60 years’ observations of the natural dynamics of the forest- SPb: SPbSRIF, 98p.
  • Smirnov, N. T. (1970). Ten years’ experience of improvement felling in Ilmen Reserve- Sverdlovsk: The Ural forests and their management. 5, 171-175.
  • Sohn, J. A., Hartig, F., Kohler, M., Huss, J. & Bauhus, J. (2016). Heavy and frequent thinning promotes drought adaptation in Pinus sylvestris forests. Ecological Applications, 26(7) 2190-2205.
  • Timofeev, V.P. & Georgievski, N.P. (1957). Density and layering of forest stands as the condition of their productivity. Goslestehizdat.
  • Verschuyl, J., Riffell, S., Miller, D. & Wigley, T. B. (2011). Biodiversity response to intensive biomass production from forest thinning in North American forests - A meta-analysis. Forest Ecology and Management, 261(2) 221-232.
  • Yurtseven, I., Serengil, Y., Gökbulak, F., Şengönül, K., Ozhan, S., Kılıç, U., Uygur, B., & Ozçelik, M. S. (2018). Results of a paired catchment analysis of forest thinning in Turkey in relation to forest management options. Science of the Total Environment, 618, 785-792.
  • Zalesov, S. V. (1986). Increment felling in pine forests of southern taiga subzone of the Ural. Sverdlovsk; Diss. Cand. agr. sc. 215p.
  • Zalesov, S. V. (1988). Influence of increment felling on the weight and productivity of assimilation apparatus of pine. - Sverdlovsk; The Ural forests and their management. 14, 152-160.
  • Zalesov, S. V. & Luganski, N. A. (1989). Increment felling in pine forests of the Ural. Sverdlovsk. Publishing House of Ural University, 128p.
  • Zeide, B. (2001). Thinning and growth: A full turnaround. Journal of Forestry, 99(1), 20-26.
  • Zhang, S., Burkhart, H. E. & Amateis, R. L. (1997). The influence of thinning on tree height and diameter relationships in loblolly pine plantations. Southern Journal of Applied Forestry, 21(4), 199-205.
Toplam 42 adet kaynakça vardır.

Ayrıntılar

Birincil Dil İngilizce
Bölüm Makaleler
Yazarlar

Sergey Zalesov Bu kişi benim

Anastasiya V. Dancheva Bu kişi benim

Sezgin Ayan Bu kişi benim

Zhumataj O. Suyundıkov Bu kişi benim

Alimzhan N. Rachımzhanov Bu kişi benim

Medeu R. Razhanov Bu kişi benim

Anton S. Opletaev Bu kişi benim

Yayımlanma Tarihi 30 Aralık 2020
Yayımlandığı Sayı Yıl 2020 Cilt: 20 Sayı: 3

Kaynak Göster

APA Zalesov, S., Dancheva, A. V., Ayan, S., Suyundıkov, Z. O., vd. (2020). Silvicultural Efficiency of the Thinning Efficiency of Pinus sylvestris L. Plantation in the Dry Subzone of Northern Kazakhstan Steppes. Kastamonu University Journal of Forestry Faculty, 20(3), 220-228. https://doi.org/10.17475/kastorman.849517
AMA Zalesov S, Dancheva AV, Ayan S, Suyundıkov ZO, Rachımzhanov AN, Razhanov MR, Opletaev AS. Silvicultural Efficiency of the Thinning Efficiency of Pinus sylvestris L. Plantation in the Dry Subzone of Northern Kazakhstan Steppes. Kastamonu University Journal of Forestry Faculty. Aralık 2020;20(3):220-228. doi:10.17475/kastorman.849517
Chicago Zalesov, Sergey, Anastasiya V. Dancheva, Sezgin Ayan, Zhumataj O. Suyundıkov, Alimzhan N. Rachımzhanov, Medeu R. Razhanov, ve Anton S. Opletaev. “Silvicultural Efficiency of the Thinning Efficiency of Pinus Sylvestris L. Plantation in the Dry Subzone of Northern Kazakhstan Steppes”. Kastamonu University Journal of Forestry Faculty 20, sy. 3 (Aralık 2020): 220-28. https://doi.org/10.17475/kastorman.849517.
EndNote Zalesov S, Dancheva AV, Ayan S, Suyundıkov ZO, Rachımzhanov AN, Razhanov MR, Opletaev AS (01 Aralık 2020) Silvicultural Efficiency of the Thinning Efficiency of Pinus sylvestris L. Plantation in the Dry Subzone of Northern Kazakhstan Steppes. Kastamonu University Journal of Forestry Faculty 20 3 220–228.
IEEE S. Zalesov, “Silvicultural Efficiency of the Thinning Efficiency of Pinus sylvestris L. Plantation in the Dry Subzone of Northern Kazakhstan Steppes”, Kastamonu University Journal of Forestry Faculty, c. 20, sy. 3, ss. 220–228, 2020, doi: 10.17475/kastorman.849517.
ISNAD Zalesov, Sergey vd. “Silvicultural Efficiency of the Thinning Efficiency of Pinus Sylvestris L. Plantation in the Dry Subzone of Northern Kazakhstan Steppes”. Kastamonu University Journal of Forestry Faculty 20/3 (Aralık 2020), 220-228. https://doi.org/10.17475/kastorman.849517.
JAMA Zalesov S, Dancheva AV, Ayan S, Suyundıkov ZO, Rachımzhanov AN, Razhanov MR, Opletaev AS. Silvicultural Efficiency of the Thinning Efficiency of Pinus sylvestris L. Plantation in the Dry Subzone of Northern Kazakhstan Steppes. Kastamonu University Journal of Forestry Faculty. 2020;20:220–228.
MLA Zalesov, Sergey vd. “Silvicultural Efficiency of the Thinning Efficiency of Pinus Sylvestris L. Plantation in the Dry Subzone of Northern Kazakhstan Steppes”. Kastamonu University Journal of Forestry Faculty, c. 20, sy. 3, 2020, ss. 220-8, doi:10.17475/kastorman.849517.
Vancouver Zalesov S, Dancheva AV, Ayan S, Suyundıkov ZO, Rachımzhanov AN, Razhanov MR, Opletaev AS. Silvicultural Efficiency of the Thinning Efficiency of Pinus sylvestris L. Plantation in the Dry Subzone of Northern Kazakhstan Steppes. Kastamonu University Journal of Forestry Faculty. 2020;20(3):220-8.

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