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PENERAPAN SISTEM MEKANISASI DALAM KEGIATAN PENEBANGAN JATI UNTUK MENGURANGI KETERGANTUNGAN TERBATASNYA PENYEDIAAN TENAGA BLANDONG DI JAWA Maman Mansyur Idris; Soenarno Soenarno
Jurnal Penelitian Hasil Hutan Vol 6, No 8 (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.1990.6.8.476 - 481

Sastrodimedjo, (1975) pointed out that the present trend of wood processing industry development and formal education of younger generation caused some problems, especially in the sustainabiliy of forest worker supply in Java.Based on this consideration an alternatif for most widely applied felling system, i.e. manual felling system, needs to be sought. With regard to this problem a study was conducted at three Sub Forest District (RPH), namely Temenggeng, Pasar Sore and Sumberogo in Central Java to compare 3 (three) felling systems in teak forest.The result of the study revealed that the teak felling productivity averages on 2 years gilrded teak with mechanical, manual and combination systems applied to flat terrain were 2.5359 m3/hour, 0.7128 m3/hour and 0.8186 m3/hour, respectively. But those on hilly terrain were 1.5540 m3/hour, 0.7374 m3/hour and 0.796 m3/hour, respectively. The average cost of full mechanical felling system applied to flat terrain was Rp 1,586.23/m3, while that of on hilly terrain was Rp 2,l 65.93/m3

PERBAIKAN BEBAN KERJA KERJANTARA DALAM KEGIATAN PENEBANGAN SECARA MEKANIS MELALUI PENERAPAN PRINSIP ERGONOMI Soenarno Soenarno; Maman Mansyur Idris
Jurnal Penelitian Hasil Hutan Vol 7, No 1 (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.1990.7.1.17 - 24

Tree felling operations in Indonesia are commonly done by standing or bending workers, using chain saws. These techniques cause high stump residues (about 8.94%) and increase workers' energy consumption by 12% for standing and 55% for bending workers' positions.From ergonomics point of view, above techniques cause body position to be less natural, produce longer static muscular work, reduce work hours, create early fatique and physiological effect like work stress.This paper described the effect of improved felling method on work stress of chain saw operators and construction wood production. An investigation was carried out in two private forest companies in Central Kalimantan in 1988. The results are as the following:The improved felling method decreases work stress of chain saw operators; showed by the reduction of pulse rate to the amount of 13-15 beats/minute. The improved method of felling trees with buttress heights of < 50 cm and 50-150 cm cause the increase in construction wood products about 0.354 m3 and 0.542 m3 per tree felled, respectively.

PENGARUH PEMBUANGAN BANIR DALAM PENEBANGAN POHON TERHADAP EFISIENSI PEMUNGUTAN KAYU (Study kasus di suatu perusahaan hutan di Kalimantan Barat) Sona Suhartana; Maman Mansyur Idris
Jurnal Penelitian Hasil Hutan Vol 13, No 1 (1995): 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.1995.13.1.19-26

This paper presents the results of the study of the impact of buttress cutting in tree felling on harvestring efficiency. The case study was carried out in PT Kurnia Kapuas Plywood in West Kalimantan in 1994. 771e aim of the study is to know the influence of buttress cutting on wood haversting efficiency.the data were analysed by using the I-test.the result of study shows that average of wood harvesting efficiency by cullting buttress is 68.1 % and without cutting buttress is 66.7 %

PENYAKIT PEKERJA DALAM KEGIATAN EKSPLOITASI HUTAN DI KALIMANTAN TENGAH Soenarno Soenarno; Maman Mansyur Idris
Jurnal Penelitian Hasil Hutan Vol 5, No 7 (1988): 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.1988.5.7.425-429

Working conditions in tropical forests especially in logging. are generally difficult. The materials handled are heavy, outdoor weather conditions are unpredicted. the growth of vegetation are commonly dense, and temperature and humidity are mostly high. These conditions. together with inappropriate workers' facilities and nutrient will lead to bad health conditions and occurence of various illnesses.An investigation carried out in two logging companies in Central Kalimantan revealed that there are 8 kinds of illnesses that are commonly suffered by workers, i.e : influenza, malaria, irritation of respiratory systems, feeling of nausea, back and neck problems, headache/giddiness, sore eyes, and skin disease. The highest risk of having illness is for those working in transportation operations, followed by felling, skidding and workshop. It is also found that the least risk is timber cruising activity.

TINGKAT KEBISINGAN DI INDUSTRI PENGGERGAJIAN KAYU STUDI KASUS DUA PENGGERGAJIAN KAYU DI KALIMANTAN SELATAN Soenarno Soenarno; Maman Mansyur Idris
Jurnal Penelitian Hasil Hutan Vol 5, No 7 (1988): 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.1988.5.7.413-416

Wood processing in Indonesia, especially sawmilling industries have been increased in the last decade. Until 1985, about 295 sawmilling industries with the production capacity of more than 8,500,000 m3/year have been installed. These industries have contributed to Indonesian foreign exchange of US$ 1,800.37 million. In their operations the problem of ergonomics, such as high noise levels has not considered yet.An investigation was conducted in two saw milling industries in South Kalimantan with the results as follows :Noise level in the second industry was varied from 96 to 102 dB(A), and in the first industry was ranged from 92 to 94 dB(A). This difference is due to differences in the machine lay out and working space design. Both levels are higher than the maximum tolerable noise level of 85 dB(A).Noise protection means for workers in the first industry are not required for the time being, but in the second industry they are strongly recommended.

PENGARUH FREKUENSI MAKAN TERHADAP JAM KERJA PENEBANG JATI DI KPH JOMBANG Maman Mansyur Idris; Sona Suhartana
Jurnal Penelitian Hasil Hutan Vol 4, No 3 (1987): Jurnal Penelitian Hasil Hutan
Publisher : Pusat Penelitian dan Pengembangan Hasil Hutan

One of heavy work in the forestry activity in Indonesia is manual tree felling of the teak. This work needs much physical labor. Grandjean (1982) states that an extreem physical exertion needs energy about 4,500 kcal/day.In order to continue teak production it is needed to improve welfare of the laborer by giving a better nutrition.A study was conducted to evaluate the effect of calorie intake on the performance of the laborer and data were analyzed by using tabulation. The result showed that eating frequency are highly significant for teak tree fellers productive working hour, age group of 18-40 years with their average productive working hours were 5 hours, 9 minutes and 29 seconds for two times eating frequencies. Further the average of 6 hours, 21 minutes and 41 seconds for three times eating frequencies, and for age group 40 years up were 4 hours, 37 minutes and 25 seconds for two times eating frequencies and 5 hours, 10 minutes and 36 seconds for three times eating frequencies

PENGARUH PENYARADAN KAYU DENGAN TRAKTOR RANTAI KELABANG TERHADAP KERUSAKAN TEGAKAN TINGGAL Maman Mansyur Idris; Yahya Fakuara; Gunarwan Suratmo; Rahardjo S Suparto
Jurnal Penelitian Hasil Hutan Vol 5, No 7 (1988): Jurnal Penelitian Hasil Hutan
Publisher : Pusat Penelitian dan Pengembangan Hasil Hutan

The study of the effect of log skidding on the damage of residual stand was carried out in one logging company in West Kalimantan in 1986. The meaning of residual stand in the study are trees with diameter 20 cm and up. The result of the study shows that the average damage of residual stand is 18% per hectare, not included the damage caused by felling i.e. 15% per hectare. According lo Indonesian Selective Cutting System, the residual stand is good enough to fulfill the sustained yield condition, that is keep at least 25 core trees to be left per hectare. The role of skidded trees number and stand density was significant effect on the residual stand damage.

LIMBAH KAYU AKIBAT PEMBUATAN JALAN HUTAN DAN TEBANG BAYANG PADA ENAM HAK PENGUSAHAAN HUTAN DI KALIMANTAN TIMUR (Wood waste caused by forest road construction and shadow cutting at six logging companies in East Kalimantan) Maman Mansyur Idris; Sona Suhartana
Jurnal Penelitian Hasil Hutan Vol 14, No 1 (1996): Buletin Penelitian Hasil Hutan
Publisher : Pusat Penelitian dan Pengembangan Hasil Hutan

This paper present the results of the study on logging waste caused by forest road construction and shadow cutting. The study carried out at six logging companies in East Kalimantan in 1990.The aim of the study are : (1) to determine the wood waste caused by forest road construction and shadow cutting, (2) to find the factors influencing the wood waste and (3) to find the way of reducing the wood waste.The results of this study shows that the average wood waste from trees felled caused by forest road construction and shadow cutting is 1.16 m3/ha for commercial wood species and 2. 76 m3/ha for non-commercial wood species.Keywords : wood waste, forest road, shadow cutting

STUDI PERBAIKAN CARA PENYADAPAN KOPAL DI KPH SUKABUMI Soenarno Soenarno; Maman Mansyur Idris; Zakaria Basari
Jurnal Penelitian Hasil Hutan Vol 1, No 3 (1984): Jurnal Penelitian Hasil Hutan
Publisher : Pusat Penelitian dan Pengembangan Hasil Hutan

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.

KONDISI RUANGAN KERJA PADA TIGA PABRIK KAYU LAPIS DI SUMATRA SELATAN Maman Mansyur Idris; Sona Suhartana
Jurnal Penelitian Hasil Hutan Vol 5, No 5 (1988): Jurnal Penelitian Hasil Hutan
Publisher : Pusat Penelitian dan Pengembangan Hasil Hutan

An investigation on working conditions of three plywood factories in South Sumatra was conducted in 1987; The objective is to find out the workers judgement about their working conditions in terms of conveniences.The total of 265 respondents from plywood factories employed in the processing steps of wood preparation, peeling, reeling, unreeling, veneer drying, veneer preparation, gluing, pressing, finishing, quality control, packaging, workshops and laboratories were interviewed.The results showed that in each processing step, more than 60% respondents felt their working space conditions were far from being convenient due to inappropriate air circulation, dust, bad smell noise, and vibration.

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