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Jurnalis Thaib
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KEADAAN JALAN SARAD DAN POHON DITEBANG PADA TEGAKAN TINGGAL DI KAWASAN SEBUAH PERUSAHAAN HUTAN DI RIAU Jurnalis Thaib; Sona Suhartana
Jurnal Penelitian Hasil Hutan Vol 9, No 4 (1991): 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.1991.9.4.144-149

Abstract

An investigation of skidding performance was conducted at one Forest company in Riau,  in 1988. The results showed that stand density  rangea  from  126 to 190  trees with an average of 158 trees/ha, soft soil .without any rock, land slope ranges from 6,8 to  20,0 % and the trees felled from 2 to 8 with an average of 5 trees/ha. Also it was found that the length of productive skidding road ranges from 91,0  m to 329,8 m with an average of 210,4 m /ha while the length of unprodue- tive skidding road vanes from 2,5 m to 49,9 m with an average of 26,2 m/ha. The ratio between the lengths of unproductive and productive  skidding road is 12,5 %. By considering tractor's life time 20.000   hours,  around  2.500  hours of them are  unproductiue, Relating this figure with owning and operating costs, those unproductive skidding road surely cause quite  large loss.  Besides, the unproductive tractor movements also cause land exposure to the amount of 122,5 m2/ha. All the above disadvantages can be minimized by planning akidding roads ahead and  strictly controlling the operation.
TINGKAT KERUSAKAN TEGAKAN HUTAN AKIBAT OPERASI PENEBANGAN PADA DUA HAK PENGUSAHAAN HUTAN DI KALIMANTAN BARAT Jurnalis Thaib
Jurnal Penelitian Hasil Hutan Vol 6, No 2 (1989): Jurnal Penelitian Hasil Hutan
Publisher : Pusat Penelitian dan Pengembangan Hasil Hutan

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (8236.317 KB) | DOI: 10.20886/jphh.1989.6.2.137-141

Abstract

Minimum   level   of  stand  damages  is one  of  the  obyectives   of  the  tropical  rain  forest  harvesting  practices  in which the  Indonesian   Selective   Cutting  system   is applied.  In order  to  meet  that  obyective,   various manuals  should   be prepared based on sound  quantitative  data.Observation    on stand  damages  due  to felling  operations  has been  carried out  in Suka Jaya  Makmur  Enterprise  (SJM) and  Kawedar  Mukti   Timber   Enterprise   (KMT),   both   located   in  West Kalimantan.   The  stand  damages  caused  by  felling one  tree  vary  from   3  to  8  trees with   an average  of  6 trees  in SJM,  and  from  2  to  7  trees  with   an average of  4  trees  in KMT.  The  relationships    between   stand  damage  (Y)  and  stand  density   (X)  are: Y = -4,69   + 0,08   X for SJM and  Y = -6,83+ 0,08 X for KMT.The  results  of  the  study  showed   that  the  major  causes of  the  variation  of  stand  damages  are  improper  direction  of tree felling,   and  less control  from  supervisors/managers.
EFEKTIVITAS JALAN HUTAN DI SUATU PERUSAHAAN HUTAN DI RIAU Dulsalam Dulsalam; Jurnalis Thaib
Jurnal Penelitian Hasil Hutan Vol 7, No 2 (1990): Jurnal Penelitian Hasil Hutan
Publisher : Pusat Penelitian dan Pengembangan Hasil Hutan

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (5172.954 KB) | DOI: 10.20886/jphh.1990.7.2.48 - 53

Abstract

An  investigation on the effectiveness of forest  roads was conducted at PT  Siak  Raya  Timber in Riau in 1989.  The objective is to find  out  the  information on construction and  uses of forest roads. The length of main and  branch roads and target and actual productions   during the latest six years (from1983/1984  to 198811989)  were collected.  The investigation  results reveal that: 1.The  length  of  forest   roads  built  annually   by  PT  Siak  Raya  Timber  ranged from  16  km  (consisting  of  10 km  main and  6 km branch  roads)  to 85 km  (consisting  of 65 km  main and 20 km branch roads), with an average of 21.66 km (consisting of 11.68 km  main and 20 km branch roads). 2.The annual  felling area of PT Siak Raya Timber was 2,600 ha. The road densities  ranged from  6.16 m/ha  to 32.69  m/ha with  an  average of 21.66 m/ha. The road density is some what high compared  to that stated  in the Forest Agreement. 3.The actual production of  logs at PT Siak Raya Timber ranged from  21,225.65 m3/year  to 47,199.04 m3/year  with an average of 34,417.03 m3/year. 4.The  differencf  between target and actual production averages was relatively large i.e.  75,500 m3/year compared to 34,417.03 m3/year. The effectiveness of forest roads  ranged  from 268.67m3/km-year to 2,305.86 m3/km-year with  an average of 1,010 m3/km-year. 
KEADAAN JALAN SARAD DAN POHON DITEBANG PADA TEGAKAN TINGGAL DI KAWASAN SEBUAH PERUSAHAAN HUTAN DI RIAU Jurnalis Thaib; Sona Suhartana
Jurnal Penelitian Hasil Hutan Vol 9, No 4 (1991): Jurnal Penelitian Hasil Hutan
Publisher : Pusat Penelitian dan Pengembangan Hasil Hutan

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (3108.73 KB) | DOI: 10.20886/jphh.1991.9.4.144-149

Abstract

An investigation of skidding performance was conducted at one Forest company in Riau,  in 1988. The results showed that stand density  rangea  from  126 to 190  trees with an average of 158 trees/ha, soft soil .without any rock, land slope ranges from 6,8 to  20,0 % and the trees felled from 2 to 8 with an average of 5 trees/ha. Also it was found that the length of productive skidding road ranges from 91,0  m to 329,8 m with an average of 210,4 m /ha while the length of unprodue- tive skidding road vanes from 2,5 m to 49,9 m with an average of 26,2 m/ha. The ratio between the lengths of unproductive and productive  skidding road is 12,5 %. By considering tractor's life time 20.000   hours,  around  2.500  hours of them are  unproductiue, Relating this figure with owning and operating costs, those unproductive skidding road surely cause quite  large loss.  Besides, the unproductive tractor movements also cause land exposure to the amount of 122,5 m2/ha. All the above disadvantages can be minimized by planning akidding roads ahead and  strictly controlling the operation.
TINGKAT KERUSAKAN TEGAKAN HUTAN AKIBAT OPERASI PENEBANGAN PADA DUA HAK PENGUSAHAAN HUTAN DI KALIMANTAN BARAT Jurnalis Thaib
Jurnal Penelitian Hasil Hutan Vol 6, No 2 (1989): 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.1989.6.2.137-141

Abstract

Minimum   level   of  stand  damages  is one  of  the  obyectives   of  the  tropical  rain  forest  harvesting  practices  in which the  Indonesian   Selective   Cutting  system   is applied.  In order  to  meet  that  obyective,   various manuals  should   be prepared based on sound  quantitative  data.Observation    on stand  damages  due  to felling  operations  has been  carried out  in Suka Jaya  Makmur  Enterprise  (SJM) and  Kawedar  Mukti   Timber   Enterprise   (KMT),   both   located   in  West Kalimantan.   The  stand  damages  caused  by  felling one  tree  vary  from   3  to  8  trees with   an average  of  6 trees  in SJM,  and  from  2  to  7  trees  with   an average of  4  trees  in KMT.  The  relationships    between   stand  damage  (Y)  and  stand  density   (X)  are: Y = -4,69   + 0,08   X for SJM and  Y = -6,83+ 0,08 X for KMT.The  results  of  the  study  showed   that  the  major  causes of  the  variation  of  stand  damages  are  improper  direction  of tree felling,   and  less control  from  supervisors/managers.
EFEKTIVITAS JALAN HUTAN DI SUATU PERUSAHAAN HUTAN DI RIAU Dulsalam Dulsalam; Jurnalis Thaib
Jurnal Penelitian Hasil Hutan Vol 7, No 2 (1990): 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.1990.7.2.48 - 53

Abstract

An  investigation on the effectiveness of forest  roads was conducted at PT  Siak  Raya  Timber in Riau in 1989.  The objective is to find  out  the  information on construction and  uses of forest roads. The length of main and  branch roads and target and actual productions   during the latest six years (from1983/1984  to 198811989)  were collected.  The investigation  results reveal that: 1.The  length  of  forest   roads  built  annually   by  PT  Siak  Raya  Timber  ranged from  16  km  (consisting  of  10 km  main and  6 km branch  roads)  to 85 km  (consisting  of 65 km  main and 20 km branch roads), with an average of 21.66 km (consisting of 11.68 km  main and 20 km branch roads). 2.The annual  felling area of PT Siak Raya Timber was 2,600 ha. The road densities  ranged from  6.16 m/ha  to 32.69  m/ha with  an  average of 21.66 m/ha. The road density is some what high compared  to that stated  in the Forest Agreement. 3.The actual production of  logs at PT Siak Raya Timber ranged from  21,225.65 m3/year  to 47,199.04 m3/year  with an average of 34,417.03 m3/year. 4.The  differencf  between target and actual production averages was relatively large i.e.  75,500 m3/year compared to 34,417.03 m3/year. The effectiveness of forest roads  ranged  from 268.67m3/km-year to 2,305.86 m3/km-year with  an average of 1,010 m3/km-year. 
Co-Authors Dulsalam Dulsalam Sona Suhartana