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Jurnal Penelitian Hasil Hutan
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Search results for , issue " Vol 1, No 3 (1984): Jurnal Penelitian Hasil Hutan" : 4 Documents clear
STUDI PERBAIKAN CARA PENYADAPAN KOPAL DI KPH SUKABUMI Soenarno, Soenarno; Idris, Maman Mansyur; Basari, Zakaria
Jurnal Penelitian Hasil Hutan Vol 1, No 3 (1984): 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.1984.1.3.34-38

Abstract

Copal from Agathis tree has been one of  important  forest  products, not only as export commodity but also as raw material for some induatries. In the last few years however production  in  this country  began to decrease, due to inefficient  tapping by the forest worker.Because of  this reason a study on the tapping procedure is necessary. Thia report deals with a preliminary study on  the present  “quarre”  type  of  tapping procedure commonly  adopted  by the forest  worker. The locality chosen was Gede Barat Sub forest district at Sukabumi, West Java.Three factors were chosen  for the tapping study, namely the effect  on of resin productivity  of the location of the wound with respect to west and east direction (factor A), time of tapping (factor B) and type of wound covering (factor C).  The result of this study show that :Covering of tap wound does not cause incoveniences   to the worker.Resin productivity is not significantly affected by the wound location.The highest production of the resin per tree comes from the wound cut in the morning and covered with black coloured polyethelene sheet.       
POTENSI HUTAN SAGU RAKYAT DI SERAM BARAT, PROPINSI MALUKU Pumama, Boen M; At, Subandi; Prahasto, Hendro
Jurnal Penelitian Hasil Hutan Vol 1, No 3 (1984): Jurnal Penelitian Hasil Hutan
Publisher : Pusat Penelitian dan Pengembangan Hasil Hutan

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (11428.697 KB) | DOI: 10.20886/jphh.1984.1.3.9-14

Abstract

 Sago, one of  some carbohydrate sources  which  has a great potential as food  stock,  grows  naturally  and distribute through out  Indonesian  archipelago,  Maluku is one  of  several  areas having  sago forest.The study  on sago forest  at West Seram in 1979,  showed that the number of  mature  trees per hectare  was 17 trees, consisted  of  several sago species  namely  tuni,  molat and makanaru.  The sago production per  tree was 419.9  kg of  wet sago or 292,5 kg  of dried  sago. 
EFISIENSI BEBERAPA JENIS TUNGKU KAYU BAKAR Hudaya, Nurmala; Hartoyo, Hartoyo
Jurnal Penelitian Hasil Hutan Vol 1, No 3 (1984): Jurnal Penelitian Hasil Hutan
Publisher : Pusat Penelitian dan Pengembangan Hasil Hutan

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (8948.912 KB) | DOI: 10.20886/jphh.1984.1.3.1-8

Abstract

The Forest Product Research and  Development Centre, Bogor, has  constructed  the Lorena,   Singer and the Traditional  fuelwood stoves to measured the  efficiency of each type. The material used for the construction of the stoves are clay, sand, sawdust, red-bricks  and  water.The  efficiency of  each  type  is  measured  by  using  the  stoves  for  cooking  water  to  boiling point in an aluminium pan, where rubber (Hevea brasiliensis) wood is used as fuelwood.The  stoves  efficiency is expressed  as the  ratio  between  the effective  heat the boiled  water absorbs and the potensial heat  produced by  firewoods.The results of the  observations and  calculations  of  the  efficiency of   the  respective types   of   firewood   stoves indicated  that  the  Lorena  stove  has the  highest  efficiency of  24.75%,  followed by the Singer stove with  24.50%, and the traditional  one,  the least  efficient   is 18.64%. Compared  with  the tested  traditional stove, the  Lorena  and  the  Singer stoves  appear  to have high efficiency which consumed 30% less of  fuelwood. 
PENGKAJIAN PARAMETER FUNGSI VOLUME POHON MELALUI FOTO UDARA DI KALIMANTAN TIMUR Sumantri, Ishak; Haryono, Haryono; Machfudh, Machfudh
Jurnal Penelitian Hasil Hutan Vol 1, No 3 (1984): Jurnal Penelitian Hasil Hutan
Publisher : Pusat Penelitian dan Pengembangan Hasil Hutan

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (29063.393 KB) | DOI: 10.20886/jphh.1984.1.3.22-33

Abstract

 The relationship  between   tree crown  diameter  and/or  tree height which  measured from aerial photos in tropical rain forest is the  object  of this  study. Result of model  analysis  by crown  diameter  and  tree height  variable are as follows   :In  the  harvested primary  forest  condition, the  most  appropriate  model  for all tree samples  is :   Y  =   30,615 -1,580 D + 1,247 T + 0,037 D2 -0,021 DT               with  coefficient   correlation  r =  0,9637.The  most  appropriate  model  by  crown  diameter  variable in the  harvested   primary  forest  condition   for all trees samples  is  :           Y = 1,732  + 0,214 D  with  r =  0,2971.          For Meranti  species,  the  most  appropriate  model  is :          Y = 6,684 - 0,555 D + 0,020 D2 with  r = 0,664  and for Ulin species is:          Y = -  37,736 + 2,738 D -  0,036 D2  with  r = 0, 776.      3. The  model  and  its analysis are valid for  East Kalimantan  only. 

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