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Jurnal Penelitian Hasil Hutan
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Articles 3 Documents
Search results for , issue " Vol 11, No 7 (1993): Jurnal Penelitian Hasil Hutan" : 3 Documents clear
PENGAWETAN LIMA JENIS KAYU SECARA RENDAMAN DINGIN DENGAN DUA JENIS BAHAN PENGAWET CCB (Cold Soaking Treatment of Five Wood Species Using Two CCB Preservatives) Abdurrohim, Sasa
Jurnal Penelitian Hasil Hutan Vol 11, No 7 (1993): Jurnal Penelitian Hasil Hutan
Publisher : Pusat Penelitian dan Pengembangan Hasil Hutan

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (8842.255 KB) | DOI: 10.20886/jphh.1993.11.7.256-266

Abstract

Wood Samples of five species measuring 3 cm x 3cm x 3cm (200 samples for each species) were treated with cold soaking treatment using Wolmanil CB and Diffusol CB preservatives for 1, 3, 5, 7, and 9 days at the concentrations of 2, 4, 6, and 8 percent,The test result of experiment, after taking both retention and penetration requirements into concideration for wood used under roof, and in the open air both without ground contact, showed that only two species, perupuk and keruing daun lebar, could be satisfactorily treated with Wolmanil CB under the experimental conditions, while other three species, damar kunyil, lanan and dungun, haven t been meet the standar. Diffusol CB preservative showed a good result only on one species, i. e. perupuk.Keruing daun lebar for under roof and in the open air usage both without ground contact can be consecutively soaked for 7 days in Wolmanit CB solution of 6 and 8 percent, while perupuk, only for under roof without ground contact, for 9 days in 8 percent solution. Perupuk used under roof and in the open air without ground contact could be soaked for 7 days in Diffusol CB solution of 4 and 6 percent.
AN OPTIMAL HARVESTING MODEL TO EVALUATE THE INDONESIAN SELECTIVE CUTTING SYSTEM (TPI) (Model pemanenan yang optimal untuk mengevaluasi tebang pilih Indonesia (TPI)) Sianturi, Apul
Jurnal Penelitian Hasil Hutan Vol 11, No 7 (1993): Jurnal Penelitian Hasil Hutan
Publisher : Pusat Penelitian dan Pengembangan Hasil Hutan

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (14722.708 KB) | DOI: 10.20886/jphh.1993.11.7.267-281

Abstract

Pendapatan dari hutan alam dalam duapuluh tahun terakhir sangat berpengaruh dalam peningkatan pendapatan masyarakat Indonesia. Hal ini akan terus berlangsung bila hutan alam dapat dikelola dengan berkesinambungan atau lestari. Salah satu elemen penting agar hutan alam dapat lestari dalam memberikan hasil adalah dengan meninggalkan cukup tegakan tinggal yang sehat pada setiap kali mengadakan tebang pilih.Tujuan dari study ini adalah untuk mengevaluasi sistim Tebang Pilih Indonesia (TPI), terutama dalam kaitannya dengan rotasi tebang, banyaknya pohon yang ditebang, dan banyaknya pohon sehat yang ditinggalkan. Dalam menentukan pilihan yang terbaik digunakan maksimalisasi nilai hutan yang didapat dengan menyusun model program linear (linear programing). Pertumbuhan (growth) dari hutan alam setelah diadakan penebangan diproyeksikan dengan model matrik transisi. Pohon dlkategorikan dalam dua grup yaitu diptrocarp dan non-diptrocarp, serta dalam 7 kelas diameter.Model program linear digunakan untuk mensimulasi 7 macam rotasi tebang, 3 tingkat suku bunga, 3 tingkat kerusakan tegakan, dan 6 macam sistim royalty,Hasil dari simulasi menunjukkan bahwa rotasi tebang yang optimal ditentukan oleh besarnya suku bunga serta tingkat kerusakan tegakan tinggal. Makin besar suku bunga yang digunakan makin pendek rotasi tebangan yang memberikan nilai hutan tertinggi, yang berarti bahwa penggunaan suku bunga yang tinggi memaksa untuk memanfaatkan sumber daya alam lebih cepat. Sebaliknya, bila kerusakan tegakan tinggal besar maka rotasi tebang harus lebih panjang,Dalam pada itu jumlah pohon tinggal yang sehat, serta jumlah pohon yang ditebang ditentukan oleh rotasi tebang serta tingkat kerusakan tegakan tinggal. Makin panjang rotasi tebang makin banyak jumlah pohon yang dapat ditebang dan ditinggalkan.Sebaliknya, makin besar kerusakan tegakan tinggal yang diperbolehkan, makin sedikit jumlah pohon yang dipungut dan yang ditinggalkan sebagai tegakan tinggal.
PENGARUH PAJAK TERHADAP BIAYA SEWA DAN PERMINTAAN KAPITAL Kasus : kayu gergajian tropis (THE IMPACT OF TAX ON RENTAL PRICE AND DEMAND FOR CAPITAL Case Study: Tropical Sawn Timber) Irawanti, Setiasih
Jurnal Penelitian Hasil Hutan Vol 11, No 7 (1993): Jurnal Penelitian Hasil Hutan
Publisher : Pusat Penelitian dan Pengembangan Hasil Hutan

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (9877.371 KB) | DOI: 10.20886/jphh.1993.11.7.294-301

Abstract

The objective of this study is to estimate the impact of tax rate on rental price of capital and demand for capital in sawn timbel industry. Sawn timber industry analysed is limited to the sawmills belong to the forest conccession.The study used secondary data. Data analysed are time-series data of interest rate, depreciation, tax rate, and price index of investment, sawn timber production and price.The result of analysis shows that the increase of sawn timber export tax rate at the end of 1989 has caused a rental price of capital increase by approxincalely 4 times, and there was a decrease in the use of capital stock. Demand for equilibrium capital stock of sawn timber industry decreased by Rp 5.077 million (constant price 1983 ) and Rp 5.395 million (constant price 1983) in 1990 and 1991,respectively,or about 50%. it shows that there was a stagnation in the growth of sawn timber industry

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