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Jurnal Penelitian Hasil Hutan
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Articles 5 Documents
Search results for , issue " Vol 2, No 4 (1985): Jurnal Penelitian Hasil Hutan" : 5 Documents clear
EVEKTIVITAS PENGGUNAAN TIRFOR DAN KATROL TUAS PADA PENEBANGAN JATI DI JAWA TENGAH Idris, Maman Mansyur; Basari, Zakaria; Soenarno, Soenarno
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 (4778.193 KB) | DOI: 10.20886/jphh.1985.2.4.8-13

Abstract

The study  of  tirfor  and lever block  effectiveness in teak felling was conducted at the Perum Perhutani  (The Forest State  Corporation) Unit I Central Java on June 1982 and July  1983. Both felling equipments were used cut the press down  to the desired directions.The purpose  of  the  study  is to find  out  the effects  of tirfor and lever block  on log damager in felling actives.  The study  was carried out  in a three  locations  with  different slopes  i.e. 0 -10% and 11 – 30%.The result  indicates  that on  the  11 - 30% slope,  the  tirfor  reduces 5.25%  log damages compared  with  that of the lever block.  It is concluded that in sloped areas tirfor is more efective  then lever block.
KOMPOSISI JENIS KAYU YANG DIGUNAKAN DALAM KONSTRUKSI JALAN REL DI HUTAN RAWA SUMATERA DAN KALIMANTAN Dulsalam, Dulsalam; Sianturi, Apul
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 (4194.99 KB) | DOI: 10.20886/jphh.1985.2.4.24-27

Abstract

Data collected consist of the diameters and lengths of wood used in railroad construction in swamp forests of ten forest companies in Sumatera, and six in Kalimantan. Railroads in the swamp forests are different in construction compared to those in the teak forests, generally requiring four layers of sleepers.  This, of course, is due to the extremely low bearing capacity of the soil little is known about the problems of this type of railroad construction, primarily with regard to the quantity of wood required.The steps of collecting data were as follow:Selecting suitable forest companies in Sumatera and in Kalimantan to be surveyed.In each forest area 20 samples of 50 m rail track sections were drawn systematically.Diameters and lengths of logs within the sections were measured according to layers.The average amount of wood used in swamp forests railroad in Sumatera and Kalimantan are respectively 142 m3/km and 188 m3/km. The volume of wood used in every km of railroad between regions are significantly different, and those among forest companies very significantly.Wood used in every km of railroad construction and for layer of sleepers vary. The average of wood used for railroad construction of the 1st and 2nd layer in Sumatera are respectively 55 m3  /km and 87 m3/km.  Those in Kalimantan consist of four layers of sleepers, i.e.:   Ist, 2nd,  3rd and 4th layer from the  top-down,  averaging 32 m3lkm, 64 m3/km, 74 m3/km and 18 m3/km of wood used per layer respectively.
PENGARUH INTENSITAS PENEBANGAN DAN LERENG TERHADAP KETERBUKAAN TANAH Thaib, Jurnalis
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.
SERBUK BABAKAN BAKAU SEBAGAI PEREKAT PAPAN PARTIKEL Sumadiwangsa, Suwardi
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 (6339.535 KB) | DOI: 10.20886/jphh.1985.2.4.1-7

Abstract

This experiment evaluate the use of mangrove (Rhizophora mucronata) bark powder mixed with paraformaldehyde as an adhesive in particleboard manufacturing.  The treatments consisted of powder size (100 and 140 mesh) and pressing temperature (110,125,  and 140° C).  The qualities observed were physical and mechanical properties of the boards.The effect of powder size on the properties of particleboard was negative. The effect of temperature on the properties of particleboard was on the other hand significant.  There is a linear correlation between temperature and each property of particleboard. Except Thickness Swelling, all properties conform with Particleboard Standard issued by FAO (1966), especially at temperature 125° C or above.
BIAYA KONSTRUKSI DAN VOLUME KAYU PADA JALAN REL KAYU DAN REL BESI Dulsalam, Dulsalam; Sianturi, Apul
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 (4328.896 KB) | DOI: 10.20886/jphh.1985.2.4.19-23

Abstract

An investigation on construction cost and wood use in railroad tracks in swamp forests has been carried out at two companies located in West Kalimantan in 1983.The investigation arrives at the following conclusion:The construction of both wooden and steel railroad tracks uses 4 layers of sleepers. The difference between the two lies in the rails itself.The bearing capacity of steel railroad track ranges from 2 to 4 tons, while that of wooden railroad track from 10 to 15 tons.Construction cost of  wooden railroad tracks is lower than that of  steel railroad tracks,  i.e., Rp. 2.350.000.-/km and Rp. 11.483.000.-/km respectively. The volume of wood used in wooden and steel railroad tracks is 243 m3/km  and 241 m3/km respectively.The amounts of wood used between wooden railroad tracks and steel railroad tracks do not differ significantly. Among layer, however, they differ highly significantly.

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