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All Journal Jurnal Ilmu Pertanian Indonesia Jurnal Ilmu Tanah dan Lingkungan (Journal of Soil Science and Environment) Jurnal AGROTEKNOLOGI Journal of Tropical Soils Journal of Degraded and Mining Lands Management Jurnal Pengelolaan Sumberdaya Alam dan Lingkungan (Journal of Natural Resources and Environmental Management) Widyariset Jurnal Wilayah dan Lingkungan Jurnal Tataloka JURNAL ILMIAH GEOMATIKA MAJALAH ILMIAH GLOBE Informatika Pertanian Jurnal Tanah dan Iklim Widyariset Science and Environmental Journals for Postgraduate International Journal on Food, Agriculture and Natural Resources (IJFANRES) Makara Journal of Science
Untung Sudadi
Departemen Ilmu Tanah Dan Sumberdaya Lahan, Fakultas Pertanian IPB, Institut Pertanian Bogor, Kampus IPB Darmaga, Bogor 16680
Aerospace Engineering Agriculture, Biological Sciences & Forestry Astronomy Automotive Engineering Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Decision Sciences, Operations Research & Management Earth & Planetary Sciences Education Electrical & Electronics Engineering Energy Engineering Environmental Science Immunology & microbiology Industrial & Manufacturing Engineering Library & Information Science Materials Science & Nanotechnology Mathematics Mechanical Engineering Neuroscience Physics Social Sciences

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ARAHAN DAN STRATEGI PENGEMBANGAN AREAL BEKAS TAMBANG TIMAH SEBAGAI KAWASAN PARIWISATA DI KABUPATEN BANGKA Lia Meyana; Untung Sudadi; Boedi Tjahjono
Jurnal Pengelolaan Sumberdaya Alam dan Lingkungan (Journal of Natural Resources and Environmental Management) Vol. 5 No. 1 (2015): Jurnal Pengelolaan Sumberdaya Alam dan Lingkungan (JPSL)
Publisher : Graduate School Bogor Agricultural University (SPs IPB)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29244/jpsl.5.1.51

Abstract

Bangka Island is known by the people of Indonesia and the world as the island's largest tin producer in Indonesia and has potential natural attractions such as beaches that surround the island of Bangka.This study is motivated by the former tin mining land that is not used optimally. One of waysis used to utilize former tin mine area is to develop it as a tourism area in Bangka Regency. The aim of this study is to identify and map the former tin mining area, to find out the priority areas of tourism development, to find out the types of tourism that can be developed, and to formulate strategies in the development of the former tin mining area as a tourism area. The analytical method used is the analysis of Geographic Information Systems (GIS), schallogram analysis, AHP and A'WOT (combination of AHP and SWOT). The result showed that the area of the former tin mines in Bangka spread six sub-districts. The priority areas for the development of the former tin mining area as a tourism area directed at Riau, Parit Padang, Kuto Panji and Kenanga Village. According to the perceptions of stakeholders, the types of tourism that can be developed on a former tin mining areas prioritized in the natural attractions of water recreation, culture tourism in the form of a tourist village, and artificial tourism in the form of edutourism. The main priority strategies that can be done is to develop mining tourism as a brand image. Keywords: former tin mining, mining tourism, development strategy
POLA PERUBAHAN PENGGUNAAN LAHAN DAN EVALUASI PEMANFAATAN RUANG DI KABUPATEN BANJARNEGARA, PROVINSI JAWA TENGAH Risky Ramadhan; Widiatmaka Widiatmaka; Untung Sudadi
Jurnal Pengelolaan Sumberdaya Alam dan Lingkungan (Journal of Natural Resources and Environmental Management) Vol. 6 No. 2 (2016): Jurnal Pengelolaan Sumberdaya Alam dan Lingkungan (JPSL)
Publisher : Graduate School Bogor Agricultural University (SPs IPB)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29244/jpsl.6.2.159

Abstract

Perkembangan sosial ekonomi wilayah yang dinamis memberikan dampak terhadap penggunaan lahan. Ketersediaan lahan yang tetap mengakibatkan terjadinya persaingan dalam pemanfaatan lahan, dengan konsekuensi perubahan penggunaan lahan yang semakin intensif. Penelitian ini bertujuan untuk: (1) mengetahui pola perubahan penggunaan lahan pada beberapa titik tahun (2001, 2008 dan 2015) di Kabupaten Banjarnegara, dan (2) mengevaluasi kesesuaian antara pemanfaatan ruang saat ini dengan alokasi ruang berdasarkan RTRW Kabupaten Banjarnegara. Metodologi yang digunakan adalah analisis spasial pada citra dan analisis inkonsistensi alokasi pola ruang dalam RTRW dan pemanfaatan ruang. Penggunaan lahan di Kabupaten Banjarnegara tahun 2001 didominasi kebun dengan proporsi 40.018,5 ha, tegalan 28.524 ha, sawah 18.319,1 ha , hutan 10.163,8 ha, lahan terbangun 8.895,1 ha, semak belukar 7.203,4 ha, tubuh air 1.716,4 ha dan lahan terbuka 103,2 ha. Pada tahun 2008 terjadi penambahan luasan kebun 1.781,2 ha, lahan terbangun 977,5 ha, semak belukar 618,3 ha, dan tegalan sebesar 155,1 ha. Sementara itu, hutan mengalami penurunan luasan yang siginifikan sebesar 2.498 ha, diikuti oleh sawah sebesar 1.025 ha dan lahan terbuka 9 ha. Pada tahun 2015 terjadi penambahan luasan kebun sebesar 464,1 ha, lahan terbangun 1.048,1 ha, semak belukar 238,6 ha, dan tegalan 474,1 ha. Hutan mengalami penurunan sebesar 1.342,8 ha, sawah 872,8 ha dan lahan terbuka 9,2 ha. Pengaturan alokasi lahan pada pola ruang tahun 2011-2031 Kabupaten Banjarnegara menunjukkan inkonsistensi dengan peta penunjukan kawasan hutan sebesar 13.737 ha atau 11,9% dari luas wilayah. Sementara itu, kondisi penggunaan lahan tahun 2015 di Kabupaten Banjarnegara menunjukkan inkonsistensi dengan alokasi pola ruang sebesar 37.032,7 ha atau 32,1% dari luas wilayah
POTENSIAL REDOKS TANAH SEBAGAI PENDUGA RESPIRASI HETEROTROF DARI LAHAN GAMBUT PERKEBUNAN KELAPA SAWIT DI RIAU Bargowo Addianto; Bandung Sahari; Atang Sutandi; Untung Sudadi
Jurnal Pengelolaan Sumberdaya Alam dan Lingkungan (Journal of Natural Resources and Environmental Management) Vol 10 No 2 (2020): Jurnal Pengelolaan Sumberdaya Alam dan Lingkungan (JPSL)
Publisher : Pusat Penelitian Lingkungan Hidup, IPB (PPLH-IPB) dan Program Studi Pengelolaan Sumberdaya Alam dan Lingkungan, IPB (PS. PSL, SPs. IPB)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29244/jpsl.10.2.163-172

Abstract

Respirasi tanah terdiri atas respirasi autotrof dan heterotrof. Pada lahan gambut, respirasi heterotrof setara dengan laju dekomposisi bahan gambut. Penelitian ini bertujuan mengembangkan model potensial redoks (Eh) tanah sebagai penduga respirasi heterotrof dari perkebunan kelapa sawit pada lahan gambut tropika. Respirasi tanah diukur menggunakan metode sungkup tertutup pada plot close-to-tree (berjarak 2 m dari pohon) dan far-from-tree (4.5 m dari pohon), sedangkan untuk respirasi heterotrof pada plot root-cut (4.5m dari pohon) yang disiapkan dengan pemotongan akar hingga kedalaman 80 cm dan diinkubasi selama 8 bulan. Respirasi tanah pada lokasi penelitian 40.81 ton CO2 ha-1.th-1, 50.53% darinya berasal dari respirasi komponen heterotrof (RKH). Respirasi heterotrof berkorelasi positif dengan Eh tanah pada pH 7 di kedalaman -30 dan -90 cm (Eh7~30 and Eh7~90) dan berkorelasi negatif dengan tinggi muka air tanah. Nilai koefisien korelasi linier sederhana yang signifikan, r= 0.84 dan 0.87; n= 12, dengan RKH masing-masing ditunjukkan oleh Eh7~30 and Eh7~90. Oleh sebab itu, kedua faktor tersebut dapat disarankan sebagai penduga RKH dengan persamaan: RKH (ton CO2 ha-1.th-1) = 18.2 + 0.029 Eh7~30 + 0.037 Eh7~90 (Eh dalam mV).
Pengaruh Kerapatan Akar, Pupuk, dan Kedalaman Muka Air Tanah terhadap Emisi CO2 dari Tanah Gambut pada Perkebunan Kelapa Sawit Setiari Marwanto; Supiandi Sabiham; Untung Sudadi; Fahmuddin Agus
Jurnal Tanah dan Iklim (Indonesian Soil and Climate Journal) Vol 37, No 1 (2013)
Publisher : Balai Besar Penelitian dan Pengembangan Sumberdaya Lahan Pertanian

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21082/jti.v37n1.2013.9-18

Abstract

PRODUKSI BIODIESEL DARI BIOMASSA Chlamydomonas sp. ICBB 9113 DIKULTIVASI MENGGUNAKAN MEDIA YANG MURAH: EFEKTIFITAS DARI BEBERAPA METODE EKSTRAKSI Patmawati Patmawati; Bustami Ibrahim; Iriani Setyaningsih; Untung Sudadi
Widyariset Vol 17, No 2 (2014): Widyariset
Publisher : Pusbindiklat - LIPI

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (344.292 KB) | DOI: 10.14203/widyariset.17.2.2014.269-276

Abstract

The main challenges to overcome in biodiesel production from microalgae are lower oil yield, as compared to those derived from plant and animal biomass, and expensive culture media. This work was aimed to compare the effectivity of three extraction methods differed in solvent used, e.g. n-hexane (N-hex), ethanol (Eth), and mixture of chloroform-methanol-water (CMW), to extract crude lipid and biodiesel from dry biomass of Chlamydomonas sp. ICBB 9113. This microalgae was cultivated in a cheap culture media using N and P soil fertilizers as nutrient sources. The results showed that, by using N-hex, Eth, and CMW methods, it could be extracted, respectively, 0.06%, 4.51%, and 20.45% crude lipid, and 384.2, 1333.8, and 2430.6 mg/100g biodiesel. The fatty acid profile of the studied microalgae biomass was: C8:0 (0.11%), C10:0 (0.09%), C14:0 (7.70%), 16:0 (1.39%), C18:0 (0.85%), C14:1 (5.12%), C16:1 (7.09%), C18:1 (8.28%), C18:2 (12.80%), and C18:3 (42.57%). Fatty acid characterization showed that Chlamydomonas sp. ICBB 9113 was dominated by C18: 3 and C16:0. Therefore, these microlagae were suitable to be used as raw material for biodiesel production to substitute the conventional fuel.
The Landslide Susceptibility Deliniation Using Analitycal Hierarchy Process in Banjarnegara Regency, Central Java Risky Ramadhan; Widiatmaka Widiatmaka; Untung Sudadi
Science and Environmental Journal for Postgraduate Vol 3 No 1 (2020): Science and Environmental Journals for Postgraduate (SENJOp)
Publisher : Pascasarjana, Universitas Negeri Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24036/senjop.v3i1.102

Abstract

Understanding the role of controlling factors and their geographical patterns is very important to predict landslide insecurity in the future. Until now, several qualitative, quantitative and semi-quantitative methods have been used to produce landslide-prone maps such as the Analytical Hierarchy Process (AHP). This study aims to: 1) identify landslide-prone factors in Banjarnegara Regency, 2) delineation spatial patterns of landslide-prone areas using the AHP method in Banjarnegara Regency. Factors that cause Banjarnegara Regency to be prone to landslides are slope, rainfall, soil type, lithology, land use, and land shape. Landslide-prone classification using AHP method produces 5 zones, namely very low prone zones (32.97%), low (19.69%), medium (25.31%), high (17.46%) and very high (4.55%). Landslide prone assessment using the AHP method has an accuracy rate of 81%, so the classification of landslide-susceptibility zones is categorized as high.
Kontribusi Sifat Biokimia Tanah sebagai Determinan Produktivitas Lahan Perkebunan Nanas (Ananas comosus [L.] Merr.) di Kabupaten Lampung Tengah Kusuma handayani; Nisa Rachmania Mubarik; Atang Sutandi; Dwi Andreas Santosa; Untung Sudadi
Jurnal Pengelolaan Sumberdaya Alam dan Lingkungan (Journal of Natural Resources and Environmental Management) Vol 12 No 4 (2022): Jurnal Pengelolaan Sumberdaya Alam dan Lingkungan (JPSL)
Publisher : Pusat Penelitian Lingkungan Hidup, IPB (PPLH-IPB) dan Program Studi Pengelolaan Sumberdaya Alam dan Lingkungan, IPB (PS. PSL, SPs. IPB)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29244/jpsl.12.4.729-739

Abstract

One of the management challenges in pineapple cultivation at plantation scale is the still occurrence of disparity in land productivity across the cultivated area although the cropping practices have been implemented for many years. In the case of a pineapple plantation in Central Lampung Regency, contribution of soil biochemical properties in terms of various soil enzyme activities as a determinant factor of land productivity has never been elaborated. This research was aimed to study the relationships among biochemical and other soil properties with land productivity or pineapple yield at plantation scale. Rhizosphere soil-composite samples were taken purposively from 4 stations at the largest Indonesian pineapple plantation representing blocks with high and low yield and growth at vegetative and generative phase. Relationships amongst the studied parameters were evaluated using PCA and linear multiple regression analysis. The results showed significant contributions of the rhizosphere soil properties on the pineapple yield according to equation: Yield = 64.895 – 6.546 PCA1 +13.057 PCA2 – 7.722 PCA4 (R2= 0.612), where PCA1 consisted of soil available-P, available-K, and CEC; PCA2 was of soil base saturation, total microbe population, enzyme activities of cellulase and invertase, while PCA4 was of soil organic C, silt fraction, and phosphatase activities.
Karakteristik jerapan fosfat ‘kleinano’ terseparasi dari tuf volkan Indonesia Untung Sudadi; Muhammad Anggi Imaduddin; Iskandar Iskandar
Jurnal Pengelolaan Sumberdaya Alam dan Lingkungan (Journal of Natural Resources and Environmental Management) Vol 12 No 4 (2022): Jurnal Pengelolaan Sumberdaya Alam dan Lingkungan (JPSL)
Publisher : Graduate School Bogor Agricultural University (SPs IPB)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29244/jpsl.12.4.740-748

Abstract

From an Indonesian volcanic tuff taken from parent material layer of an Andisols profile, it was separated ‘nanoclay’ fraction of <200 nm particle size. The separated ‘nanoclay’ exhibits pH-dependent charge characteristic due to the presence of allophane in the tuff. Therefore, it can be utilized as a natural anionic adsorbent since its separation process was conditioned to proceed at pH <4.0. This study aims to compare phosphate adsorption characteristics of positively charged ‘nanoclay’ based on Langmuir, Freundlich, Brunauer-Emmett-Teller (BET), and Dubinin-Radushkevich (D‒R) isothermal models. The ‘nanoclay’ was separated using US Patent No. US2010/0187474 A1 procedure that was modified in this study with addition of HCl treatment. The results showed that after 48 h equilibration, application of Langmuir and D‒R model resulted adsorption capacity (qe para-meter) of 460.78 (two-sites) and 439.66 mg.g-1 (heterogeneous sites), respectively, while BET and Freundlich model resulted respectively adsorption at the first adsorptive layer (qmono parameter) of 111.11 mg.g-1 (multilayers) and adsorption constant (1/n parameter) of 0.28. The later indicated that the studied ‘nanoclay’ was a high-quality adsorbent (1/n value 0.1-0.5). Limitations and advantages application of each model were discussed. However, Langmuir showed the best performance in term of linear equations with the highest R2 values obtained.
Strategi Pengendalian Konversi Lahan Sawah untuk Mempertahankan Swasembada Pangan di Kabupaten Toba: Strategies to Control Paddy Field Conversion for Mantaining Food Sufficiency in Toba Regency Tugma Jaya Manalu; Dyah Retno Panuju; Untung Sudadi
Jurnal Ilmu Tanah dan Lingkungan Vol 24 No 2 (2022): Jurnal Ilmu Tanah dan Lingkungan
Publisher : Departemen Ilmu Tanah dan Sumberdaya Lahan, Fakultas Pertanian, IPB University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29244/jitl.24.2.96-102

Abstract

The food crisis is an important issue faced by many countries, including Indonesia. Paddy field conversion caused decreasing rice production in many regions, one of which is in Toba Regency. Paddy field conversion should be controlled strategically to maintain the existence of the field for food production. This study aims: 1) to identify the conversion, availability, and rice needs 2) to identify the strengths, weaknesses, opportunities, and threats (SWOT factor) affecting paddy field conversion, 3) to generate strategies that control paddy field conversion. The SWOT factors were identified through descriptive methods, literature studies, and interviews. The strategies were constructed using a hybrid Analytical Hierarchy Process (AHP) and SWOT method. The results showed that rice availability decreased by -7,030 and demand increased by 4,001 tons between 2010 and 2020 due to paddy field conversion by 3,529 ha and increasing population. The main strength to be considered for controlling paddy field conversion is managing rice land, while the main weakness that might hinder the strategy is the low level of farmer education. Moreover, the main opportunity is supporting accessibility, and the main threat was regulation concerning sustainable agricultural land. The essential strategies to control paddy field conversion in Toba Regency include Land Protection Regulation, the subsidy of production input to farmers, and use of the local government budget to build agricultural infrastructure.
Spectroscopic Analysis and Dynamics of Dissolved Organic Carbon from an Oil Palm Plantation Peatland Untung Sudadi; Ahmad Imtaz Sumbari; Budi Nugroho
Jurnal Pengelolaan Sumberdaya Alam dan Lingkungan (Journal of Natural Resources and Environmental Management) Vol 13 No 1 (2023): Jurnal Pengelolaan Sumberdaya Alam dan Lingkungan (JPSL)
Publisher : Pusat Penelitian Lingkungan Hidup, IPB (PPLH-IPB) dan Program Studi Pengelolaan Sumberdaya Alam dan Lingkungan, IPB (PS. PSL, SPs. IPB)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29244/jpsl.13.1.1-10

Abstract

Drainage following conversion of peatlands to oil palm plantations is always associated with carbon (C) loss, one of which is dissolved organic carbon (DOC). Analytical procedure commonly used to determine DOC is the high-temperature combustion (HTC) method, which requires an expensive instrument. An alternative low-cost method has been developed. The objectives of this research were to determine and validate the most suitable UV-Vis spectrophotometer’s wavelength for estimating DOC concentration and evaluating its dynamics from an oil-palm plantation Indonesian-peatland. The DOC concentrations were measured on ground water and canal water samples at wavelengths of 254, 270, and 350 nm and the analytical results were then validated against those reference values resulted from the use of HTC method using Total Organic Carbon Analyzer (TOC Analyzer), based on simple regression analysis. The results showed that the most suitable wavelength for estimating DOC concentration using UV-Vis spectrophotometer was 350 nm. The DOC concentration in groundwater (35.67 ± 8.40 mg L-1) were around two times greater than in canal water (16.26 ± 4.15 mg L-1). The DOC flux from the research area were at the range of 0.66 ˗ 1.15 g C m-2 month-1, with an average of 0.85 g C m-2 month-1.
Co-Authors Achmad Azhari Sidik Agus Kurniawan Ahmad Imtaz Sumbari Andreas Ari Putro Dwinanto Anggria, Linca Anggriawan, Rendy Ardilles Akbar Atang Sutandi Baba Barus Bandung Sahari Bargowo Addianto Boedi Tjahjono Budi Mulyanto Budi Nugroho Budi Nugroho Budi Nugroho Bustami Ibrahim DENO OKALIA Deno Okalia, Deno DWI ANDREAS SANTOSA Dyah Retno Panuju Eka Sari Eko Fitriono Harimurti Fahmi Arief Rahman Fahmuddin Agus Faridlotul Hasanah Gian Juliano Giyanto Giyanto Gunawan Djajakirana Hartono, Arif Iriani Setyaningsih ISKANDAR Iskandar Iskandar Iskandar Iskandar Khairul Anam Khoirunnisa, Nur Syafira Khursatul Munibah Komarsa Gandasasmita Komarsa Gandasasmita Kusuma Handayani Laode Muhamad Asdiq Hamsin Ramadhan Lia Ambasari, Lia Lia Meyana M Munawir MANALU, TUGMA JAYA Muchammad Sri Saeni Muhammad Anggi Imaduddin Muhammad Ardiansyah Mustika Gusnia Sari Nahdlia Putri Alayya NISA RACHMANIA MUBARIK Patmawati Patmawati Purnamasari, Laili Putri, Elsa Kumala Qalbi, Andria Harfani Ramadhan, Risky Rendy Anggriawan Romiyanto Romiyanto Saeni, Muchammad Sri Saksono Raharjo Santun R.P. Sitorus Sari, Retno Purnama SETIARI MARWANTO Siti Nurzakiah Siti Nurzakiah Supiandi Sabiham Suria Darma Tarigan Suryani Suryani Suwardi Suwardi Syaiful Anwar Tengku Afrizal Widiatmaka Yustian Yustian Yustika, Rahmah Dewi