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All Journal MANAJEMEN HUTAN TROPIKA Journal of Tropical Forest Management Jurnal Ilmu Pertanian Indonesia MEDIA KONSERVASI Jurnal Ilmu Lingkungan Jurnal Penelitian Hasil Hutan Agrokreatif Jurnal Ilmiah Pengabdian kepada Masyarakat Jurnal Belantara Jurnal Penelitian Hasil Hutan Jurnal Sylva Lestari JURNAL HUTAN TROPIS Jurnal Penelitian Hasil Hutan
Ahmad Budiaman
Department Of Forest Management, Faculty Of Forestry And Environment, IPB University, Academic Ring Road, Campus IPB Dramaga, Bogor, Indonesia 16680
Agriculture, Biological Sciences & Forestry Chemical Engineering, Chemistry & Bioengineering Chemistry Decision Sciences, Operations Research & Management Earth & Planetary Sciences Education Energy Environmental Science Materials Science & Nanotechnology

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Cost Analysis of Skyline-assisted Felling Technique in Private Forests in Probolinggo, Indonesia Budiaman, Ahmad; Hardjanto; Natalia, Yohana
Jurnal Sylva Lestari Vol. 13 No. 1 (2025): January
Publisher : Department of Forestry, Faculty of Agriculture, University of Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23960/jsl.v13i1.990

Abstract

Tree felling is an important component of the forest harvesting system. A skyline-assisted felling technique (locally known as the ‘sandat’ felling technique) is used in private forest harvesting in Probolinggo, East Java, Indonesia, as an alternative to the conventional felling technique. This felling technique is used in private forests planted with an agroforestry pattern. Private forest farmers have recognized the technique as an effective way to protect multi-purpose tree species, especially coffee plants, but the technique’s efficiency is not yet known. The study analyzed the costs and productivity of sandat felling techniques in private forests planted with agroforestry patterns in Probolinggo. Working time studies, branch-free height, and breast height diameter measurements were carried out to calculate felling costs and productivity. The present value cost function was developed to compare the costs of sandat felling techniques with conventional felling techniques. The study showed that the productivity of sandat felling techniques was lower than conventional felling techniques. In contrast, the operating costs of sandat felling techniques were higher than those of conventional felling techniques. The operating cost per m3 rose by 20%. Additional operating costs for sandat felling techniques were incurred for procuring ropes and installing and uninstalling skyline. The felling costs will decrease with the felling team's increasing experience and skill. Keywords: agroforestry, costs analysis, felling techniques, private forests, sandat felling  
TIME CONSUMPTION AND PRODUCTIVITY OF BUCKING OF SENGON IN PRIVATE FORESTS budiaman, ahmad; Hardjanto; Natalia Rahayaan, Yohana
Jurnal Belantara Vol 8 No 1 (2025)
Publisher : Forestry Study Program University Of Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/jbl.v8i1.1070

Abstract

Bucking is a forest harvesting stage that determines the quality of round wood. The bucking in private forests uses a chainsaw. Efficient bucking process is a prerequisite for sustainable forest harvesting. The study aimed to analyze the working time and productivity of bucking using a chainsaw in private forests. The study was conducted in private forests planted with an agroforestry pattern in the Probolinggo district, East Java. Working time measurements are carried out based on analysis of video images recorded during data collection in the field. The number of bucking work cycles observed was 31 cycles. Regression analysis was used to analyze the relationship between the logs' diameter and length and the bucking's productivity. The average working time for bucking was 7.09 minutes per cycle, consisting of 77.84% working time and 22.16% non-working time. The average productivity of bucking was 2.51 m3/hour. The study provided important empirical results regarding bucking's working time and productivity in private forests where the type of felled tree was sengon. Hopefully, the study results will be useful in planning and developing bucking techniques in private forests in Indonesia.
Inovasi Teknik Penebangan terhadap Perubahan Pengetahuan dan Sikap dalam Praktik Pengelolaan Hutan Rakyat di Desa Karyasari, Kecamatan Leuwiliang Hardjanto, Hardjanto; Rahaju, Sri; Budiaman, Ahmad; Setiajiati, Fitta; Priyanto, Priyanto; Ilham, Qori Pebrial
Agrokreatif: Jurnal Ilmiah Pengabdian kepada Masyarakat Vol. 11 No. 2 (2025): Agrokreatif Jurnal Ilmiah Pengabdian kepada Masyarakat
Publisher : Institut Pertanian Bogor

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29244/agrokreatif.11.2.230-238

Abstract

Private forests cultivated using agroforestry systems have the potential to produce timber, non-timber forest products, and a variety of agricultural crops. However, such forests are still being managed in a traditional manner, both in terms of cultivation techniques and management. The Service activities of the Dosen Pulang Kampung Program specifically aimed to introduce an innovative tree felling technique called the sandat technique, which minimizes the risk of damage to understory vegetation. The method used in this program is service learning, which integrates academic learning with community service through training sessions (both theoretical and practical). The results show that community forest farmers and loggers have understood this technique, recognizing it as a newly introduced method that they find highly beneficial and are eager to adopt in their forest-management practices. Consequently, they expressed their intention to adopt it for managing community forests. This innovation has started to demonstrate increased knowledge, a shift in attitudes (towards adoption), and satisfaction with the program itself. The Sandat Technique is thus critical to becoming a policy in community forest management and should be disseminated by the forestry office/branch to community forest farmers for adoption in the future.
WORKING TIME, PRODUCTIVITY, AND COSTS OF MANUAL WOOD EXTRACTION IN PRIVATE FORESTS budiaman, ahmad; Hardjanto; Lively Limbong, Zest
Jurnal Belantara Vol 8 No 2 (2025)
Publisher : Forestry Study Program University Of Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/jbl.v8i2.1128

Abstract

Wood extraction using human power is a popular wood extraction technique in private forest harvesting in Indonesia. The method is used for transporting short logs over a short distance in flat or steep areas, which do not have adequate transport roads. The study aimed to analyze time consumption, productivity, and costs of wood extraction using human power in private forests. The study was conducted in a private forest in Probolinggo, East Java. The study was carried out in two cutting blocks. The first cutting block was 50 m from the landing, while the second was 250 m. The data collected included working time, productivity, and costs of wood extraction using human power. Working time data were obtained through video analysis, diameter, and tree height data were collected through direct measurements in the field, and cost data was obtained through direct measurements and interviews. Work time analysis was carried out for 73 cycles for cutting block 1 and 57 cycles for cutting block 2. The results showed that the workers spent most of their time on loaded trips, followed by empty travel, and for personal purposes. The lowest working time was placing and arranging the wood at the landing. The average wood extraction time per cycle was 4.49 minutes for a skidding distance of 50 m and 16.30 minutes for a skidding distance of 250 m. The results showed that the productivity of wood extraction using human power varied from 0.45 to 1.75 m3/hour. The cost of wood extraction using human power in private forests was IDR. 13.33/m3 for a skid distance of 50 m and IDR 51.85/m3 for a skidding distance of 250 m
Agroforestry Harvesting Residue: A Case Study in Private Forests in Probolinggo, East Java, Indonesia Budiaman, Ahmad; Hardjanto; Ilham, Qori Pebrian; Maharani, Chandra Puspita
Jurnal Sylva Lestari Vol. 12 No. 1 (2024): January
Publisher : Department of Forestry, Faculty of Agriculture, University of Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23960/jsl.v12i1.809

Abstract

One of the wood sources in Indonesia is derived from private forests managed with agroforestry systems. The harvesting operation in these forests will produce harvesting residues. The study aimed to quantify the harvesting residue volume and to construct a prediction model for harvesting residue volume in a private forest managed with an agroforestry system. The study was conducted in a private forest managed with an agroforestry system in Probolinggo, East Java. The method employed for quantifying harvesting residue was a whole-tree method. The harvesting residue was classified into stumps, butt ends, top logs, and branches. Harvesting residues with dbh >= 4 cm were measured after harvesting. The best model was selected based on the Root Mean Squared Error and the adjusted coefficient of determination values.   The number of sample trees was 31 trees, which were chosen by farmers to be felled. The study found that the harvesting residues were 6% of the total harvested volume. The harvesting residue was predominantly the stumps. The best model for estimating harvesting residue volume in agroforestry private forests was V = 0.042VolTot1.248. The study concluded that harvesting operations in private forests managed with agroforestry systems produced a small number of harvesting residues. The harvested volume was the most significant indicator for estimating the harvesting residue volume.     Keywords: agroforestry, harvesting residue, private forests, predicting models
Time Consumption and Productivity of Motorbike Timber Extraction in Private Forests Budiaman, Ahmad; Hardjanto; Limbong, Zest Lively
Jurnal Sylva Lestari Vol. 12 No. 1 (2024): January
Publisher : Department of Forestry, Faculty of Agriculture, University of Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23960/jsl.v12i1.815

Abstract

Timber extraction in private forests in Indonesia is carried out using appropriate technology. Motorbike extraction is one of the means of timber extraction widely used in private forests in Indonesia. This research aimed to analyze the working time and productivity of timber extraction using motorbikes in private forests. The research was conducted in a private forest in Probolinggo, East Java. The terrain conditions at the study site were partly flat and partly rather steep. The study site can only be accessed through a footpath that is 2 m wide. Observations were made on three motorbikes. The number of trips for each motorbike was 11 trips. The skidding distance was 300 m. Data on timber extraction work time were obtained through video analysis. Production data on timber extraction were obtained through direct measurements in the field. The research showed that the work time spent to transport timber from private forests using motorbikes was 18.18 minutes per trip. The loaded travel spent the highest working time, followed by the empty travel, logs stacking, unloading, and traveling to logs. The efficiency of timber extraction using motorbikes in private forests was 82.11%. The productivity of timber extraction was 0.61 m3/hour or 0.002 m3/hour.m. Keywords: appropriate technology, motorbike, private forests, timber extraction, working time
EFFEKTIVITAS TEKNIK PENEBANGAN TERARAH DENGAN BANTUAN TALI DI HUTAN RAKYAT Budiaman, Ahmad; Hardjanto; Agustin, Sarah
Jurnal Belantara Vol 7 No 2 (2024)
Publisher : Forestry Study Program University Of Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/jbl.v7i2.1041

Abstract

Directional felling is a technique that directs fallen trees in a predetermined direction to minimize damage to residual stands and understory plants and facilitate subsequent stages of timber handling. One of the felling techniques used in private forest harvesting was the rope-assisted directional felling technique. The study aimed to analyze and evaluate the effectiveness of the rope-assisted directional felling technique in private forests. The study was conducted in a private forest managed with an agroforestry system in Probolinggo, East Java. The number of sampled trees was 31 trees. The sampled trees were felled to the predetermined directions: to a stretched rope between two spar trees or the safe area. Felling errors, hang-ups, and the presence of barber chairs were used to assess the effectiveness of the rope-assisted felling technique. The average diameter of the felled trees was 23.4 cm and 20.8 m in height. The ropes-assist directional felling technique produced a hang-up tree of 19.35% of the total felled trees. Directional felling using ropes made fallen trees from close to the opposite direction of the natural felling direction. The ropes-assisted felling technique made all felled trees fall in the predetermined direction without producing barber chairs, but still causing hang-ups.
ESTIMASI POTENSI BIOMASSA DAN MASSA KARBON HUTAN TANAMAN Acacia crassicarpa DI LAHAN GAMBUT (Studi Kasus di Areal HTI Kayu Serat di Pelalawan, Propinsi Riau) Yuniawati; Ahmad Budiaman; Elias
Jurnal Penelitian Hasil Hutan Vol. 29 No. 4 (2011): Jurnal Penelitian Hasil Hutan
Publisher : BRIN Publishing

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20886/jphh.2011.29.4.343-355

Abstract

The role of forests as carbon sink and carbon store is undoubtedly important to reduce the carbon amount in the earth atmosphere thereby preventing greenbouse (GHG) effect that can induer the global warming. Among the varisar types of forest, peat swamp forest serves as the largest carbon store. A research bas been carried out at the fiber wond plantation forest comprising mostly Acacia crassicarpa species that grew on a peat land, at the Pelalawan sector, Rian Province. The research was to obtain allometric equatios that related the growth parameters of A. crassicarpa trees (Le tree diameter (D) and height either a total (tot) or branch free (Hbc)) to their growth products Le.biomess (W) and carbon mass (C). It was found that the best fitted and must representative allometric equations were consecutively IF= 0.398918D Hix (for estimating biomass patency) and C = 0.131D Htol""" (for carbon mass potency) Fartbremore, samples A. Crassicarpa tree from different stand ages (2,3,4, and 5 years old) covering particular free portions (Le main stems, branches, twigs, leaves, and roots) were tested for moisture contents, specific growity/density, ash content, volatile matter and fisced carbon. The allometric equations obtained were used to measure and estimate the biomass and carbon mass potencies of A. crassicarpa tree stands at their age group, iz. 2,3,4 and 5 years old Using those allometric equations, the estimates of biomass (W) of A. Crassicarpa for age 2, 3, 4 and 5 years old are 44.98 tons/ha, 70.35 tons/ha, 134.05 tons/ba, and 234.78 tons/year. The potency of carbon mass are 12.09 tons/ha, 36.23 tons/ha, 76.09 tons/ha and 133.10 tons/ha, for stand age 2,3,4 and 5 respectively.
Co-Authors A Sektiaji Sektiaji Adhiguna Indra nugraha Adita Agung Pradata Agus Rahmat Agustin, Sarah Ali Akbar Aziz Fajar Wahyudi Devi Muhtariana Elias Elias Elias Farikh Munir Mubarak Fitta Setiajiati Frama Haikal Hardjanto Heryana Ilham, Qori Pebrial Ilham, Qori Pebrian Indahwati Indahwati Laela Nurahma Lawrensia Limbong, Zest Limbong, Zest Lively Linda Audia Lively Limbong, Zest Lumbantobing, Sarah Nova Irene Maharani, Chandra Puspita Muhdin Muhdin Natalia Rahayaan, Yohana Natalia, Yohana Nazma Rahayu Nensi Yunita Irmawati Noor Farikhah Haneda Priyanto Priyanto Putri Komalasari Rahayaan, Yohana Natalia Rendy Heryandi Prabowo Reza Aulia Gifari Ria Dwi Afsari Ria Dwi Afsari Sarah Andini Sri Rahaju Winda Lismaya Yuniawati Yuniawati Yuniawati Yuniawati Yuniawati