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Jurnalis Thaib
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PENGARUH PENGGUNAAN TRAKTOR TERHADAP TEGAKAN TINGGAL PADA BEBERAPA PENGUSAHAAN HUTAN DI KALIMANTAN TIMUR Jurnalis Thaib
Jurnal Penelitian Hasil Hutan Vol 2, No 3 (1985): Jurnal Penelitian Hasil Hutan
Publisher : Pusat Penelitian dan Pengembangan Hasil Hutan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20886/jphh.1985.2.3.10-14

Abstract

The  damage  to  residual stands  as a  result  of  tractor  logging is evaluated.  In 10 concessions  in East Kalimantan, the number of  trees felled  per  hectare  was corelated with the percent  decrease in the number of residual trees (20 cm and up) per hectare.The  results  indicated  that  increasing  the number  of trees felled per hectare caused greater decrease in the percentage of  residual  trees (20 cm and up).A better logging plan including strict adherence to the TPI (Indonesian  Selective  Logging)  regulations, pre-laid skidding  roads and  tree  location  plan is recommended to reduce the  damage to residual stands.
PENGARUH INTENSITAS PENEBANGAN DAN LERENG TERHADAP KETERBUKAAN TANAH Jurnalis Thaib
Jurnal Penelitian Hasil Hutan Vol 2, No 4 (1985): Jurnal Penelitian Hasil Hutan
Publisher : Pusat Penelitian dan Pengembangan Hasil Hutan

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (7568.012 KB) | DOI: 10.20886/jphh.1985.2.4.28-32

Abstract

Ground exposure is one of  the stand damages caused by logging. Logging  which generally do not comply with  the stipulation  of the Indonesian  Selective  Cutting (TPI) system,  have caused varying  degrees of ground  exposure as follows:On slopes of  0 - 25% where  the number of trees felled per hectare are 0 - 4,5 - 9 and 10 or up, ground exposure varied between 5.4 -13.8%,  13.4 - 22.5%,  and 20.9 - 26.6%  respectively.On slopes of  26% and up,  where  the number  of  trees felled per hectare are 0 - 4, 5 -  9 and 10 or up,  ground  exposure  varied between 7.6 - 13.8%, 11.9 - 19.7% and  17.1- 24.6% respectively.Dominant  factors in the process of ground  exposure  are management,  particularly  with regard to the organization of skidding and hauling activities,  and  the number  of  trees felled  per unit area. Unproductive  tractor movements  e.g. in locating logs,  increases ground  exposures and total cost per unit logs produced,  and should therefore  be avoided.
KERUSAKAN TEGAKAN TINGGAL AKIBAT EKSPLOITASI HUTAN DENGAN SISTEM TRAKTOR DAN HIGHLEAD Jurnalis Thaib
Jurnal Penelitian Hasil Hutan Vol 2, No 4 (1985): Jurnal Penelitian Hasil Hutan
Publisher : Pusat Penelitian dan Pengembangan Hasil Hutan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20886/jphh.1985.2.4.14-18

Abstract

Tractor and highlead  yarding  systems  are the most  common  logging systems  in the Indonesian  Selective  Cutting  (TPI) of its tropical rain forest  exploitations.   The study of  the logging system  performances  were conducted   to evaluate the extend  of residual stand damages. Studies in 22 forestry concessions  revealed  that  the  TPI concepts  have not been adopted  satisfactorily.   The study also confirmed that the average number  of trees having 35 cm  minimum diameter  are 11.6-70.8   trees per ha of commercial  species and 18. 7-79.4 trees per ha for all species.  With regard to the  TPI, there  were only  52.6 percent of   the forest  concessions  conformed   with  the specified  conditions  where at least 25 potential  trees per ha should remained  in the residual stands.Comparative  study  with  highlead  yarding  system  indicated  that  average number  of  potential   trees in the  residual stands were 5.1-16.6  trees per ha of  commercial  species and only  6.3-21.  7 trees per ha for all species. None of the concessions  with  highlead logging systems have met  the TPI requirements.The residual stand damage when  using highlead yarding  are significantly  higher (P  < .05) in comparison  with  that of the tractors.The  residual  stand  damages  were 68.7 to  71.7 percent  for  highlead  system  while only  3.9-52.2  percent  for  the  tractor.  The study  concluded  that with  respect to damages, tractor yarding  is preferable over highlead.
PENGARUH PENGGUNAAN TRAKTOR TERHADAP TEGAKAN TINGGAL PADA BEBERAPA PENGUSAHAAN HUTAN DI KALIMANTAN TIMUR Jurnalis Thaib
Jurnal Penelitian Hasil Hutan Vol 2, No 3 (1985): Jurnal Penelitian Hasil Hutan
Publisher : Pusat Penelitian dan Pengembangan Hasil Hutan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20886/jphh.1985.2.3.10-14

Abstract

The  damage  to  residual stands  as a  result  of  tractor  logging is evaluated.  In 10 concessions  in East Kalimantan, the number of  trees felled  per  hectare  was corelated with the percent  decrease in the number of residual trees (20 cm and up) per hectare.The  results  indicated  that  increasing  the number  of trees felled per hectare caused greater decrease in the percentage of  residual  trees (20 cm and up).A better logging plan including strict adherence to the TPI (Indonesian  Selective  Logging)  regulations, pre-laid skidding  roads and  tree  location  plan is recommended to reduce the  damage to residual stands.
PENGARUH INTENSITAS PENEBANGAN DAN LERENG TERHADAP KETERBUKAAN TANAH Jurnalis Thaib
Jurnal Penelitian Hasil Hutan Vol 2, No 4 (1985): Jurnal Penelitian Hasil Hutan
Publisher : Pusat Penelitian dan Pengembangan Hasil Hutan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20886/jphh.1985.2.4.28-32

Abstract

Ground exposure is one of  the stand damages caused by logging. Logging  which generally do not comply with  the stipulation  of the Indonesian  Selective  Cutting (TPI) system,  have caused varying  degrees of ground  exposure as follows:On slopes of  0 - 25% where  the number of trees felled per hectare are 0 - 4,5 - 9 and 10 or up, ground exposure varied between 5.4 -13.8%,  13.4 - 22.5%,  and 20.9 - 26.6%  respectively.On slopes of  26% and up,  where  the number  of  trees felled per hectare are 0 - 4, 5 -  9 and 10 or up,  ground  exposure  varied between 7.6 - 13.8%, 11.9 - 19.7% and  17.1- 24.6% respectively.Dominant  factors in the process of ground  exposure  are management,  particularly  with regard to the organization of skidding and hauling activities,  and  the number  of  trees felled  per unit area. Unproductive  tractor movements  e.g. in locating logs,  increases ground  exposures and total cost per unit logs produced,  and should therefore  be avoided.
KERUSAKAN TEGAKAN TINGGAL AKIBAT EKSPLOITASI HUTAN DENGAN SISTEM TRAKTOR DAN HIGHLEAD Jurnalis Thaib
Jurnal Penelitian Hasil Hutan Vol 2, No 4 (1985): Jurnal Penelitian Hasil Hutan
Publisher : Pusat Penelitian dan Pengembangan Hasil Hutan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20886/jphh.1985.2.4.14-18

Abstract

Tractor and highlead  yarding  systems  are the most  common  logging systems  in the Indonesian  Selective  Cutting  (TPI) of its tropical rain forest  exploitations.   The study of  the logging system  performances  were conducted   to evaluate the extend  of residual stand damages. Studies in 22 forestry concessions  revealed  that  the  TPI concepts  have not been adopted  satisfactorily.   The study also confirmed that the average number  of trees having 35 cm  minimum diameter  are 11.6-70.8   trees per ha of commercial  species and 18. 7-79.4 trees per ha for all species.  With regard to the  TPI, there  were only  52.6 percent of   the forest  concessions  conformed   with  the specified  conditions  where at least 25 potential  trees per ha should remained  in the residual stands.Comparative  study  with  highlead  yarding  system  indicated  that  average number  of  potential   trees in the  residual stands were 5.1-16.6  trees per ha of  commercial  species and only  6.3-21.  7 trees per ha for all species. None of the concessions  with  highlead logging systems have met  the TPI requirements.The residual stand damage when  using highlead yarding  are significantly  higher (P  < .05) in comparison  with  that of the tractors.The  residual  stand  damages  were 68.7 to  71.7 percent  for  highlead  system  while only  3.9-52.2  percent  for  the  tractor.  The study  concluded  that with  respect to damages, tractor yarding  is preferable over highlead.
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