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All Journal Journal of Tropical Soils Journal of Degraded and Mining Lands Management AGRIPEAT STEAM Engineering : Journal of Science, Technology, Education And Mechanical Engineering Agrienvi : Jurnal Ilmu Pertanian Jurnal Agriment Pengabdian Kampus: Jurnal Informasi Kegiatan Pengabdian Pada Masyarakat Agrisintech (Journal of Agribusiness and Agrotechnology) Jurnal Kaharati Innovative: Journal Of Social Science Research
Untung Darung
Universitas Palangka Raya
Agriculture, Biological Sciences & Forestry Humanities Automotive Engineering Biochemistry, Genetics & Molecular Biology Computer Science & IT Economics, Econometrics & Finance Energy Engineering Environmental Science Industrial & Manufacturing Engineering Law, Crime, Criminology & Criminal Justice Materials Science & Nanotechnology Mechanical Engineering Public Health Social Sciences Other

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Improvement in chemical properties of degraded peatlands, physiological characteristics, and soybean yield using dolomite Asie, Erina Riak; Rumbang, Nyahu; Chotimah, Hastin E.N.C.; Darung, Untung; Saputra, Marcelino A.; Yurisinthae, Erlinda; Nurmayulis, Nurmayulis
Journal of Degraded and Mining Lands Management Vol. 12 No. 4 (2025)
Publisher : Brawijaya University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15243/jdmlm.2025.124.8235

Abstract

Degraded peatlands are natural resources that must be managed properly. The unique characteristics of degraded peatlands, such as high acidity and low availability of macro and micronutrients, are the main challenges in soybean cultivation. The pot experiment was conducted using a completely randomized design consisting of four dolomite dosage levels, namely 0, 3, 6, and 9 t/ha, with five replications. The research objective was to assess the effect of dolomite application on the chemical properties of degraded peatland, physiological characteristics, and soybean yield. The results showed that dolomite application significantly improved the chemical properties of degraded peatlands and increased the physiological characteristics and yield of soybeans. Dolomite at a dose of 6 or 9 t/ha achieved the highest pH, exchangeable Ca, and exchangeable Mg after incubation and after harvest. The highest total chlorophyll and average net assimilation rate were obtained at 9 t/ha dolomite application of 3.95 mg/g and 0.048 g/cm2/day, respectively. The relationship between dolomite and the total chlorophyll content of soybean plants was very strong (r = 0.94) with the equation y = 0.35 + 0.37x. The highest soybean seed weight was observed when dolomite was applied at a dose of 9 t/ha, resulting in 9.72 g/plant, an increase of 219.70% compared to the control. These findings suggest that optimal dolomite application can enhance the fertility of degraded peatlands and improve soybean productivity while supporting the sustainable management and rehabilitation of these ecosystems.
Microclimate of Developed Peatland of the Mega Rice Project in Central Kalimantan Jaya, Adi; Inoue, Takashi; Limin, Suwido Hester; Darung, Untung; Banuwa, Irwan Sukri
JOURNAL OF TROPICAL SOILS Vol. 15 No. 1: January 2010
Publisher : UNIVERSITY OF LAMPUNG

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.5400/jts.2010.v15i1.63-71

Abstract

Microclimate of Developed Peatland of The Mega Rice Project in Central Kalimantan (A Jaya,T Inoue, SH Limin, U Darung and IS Banuwa): In Indonesia peatland covers an area of 16 to 27 Mha and this ecosystem is vitally linked to environmental and conservation issues, as well as its economic value for human survival. These peatlands are, however, the subject of various land use pressures, including forestry, agriculture, energy and horticulture. A field study was carried out 6 years after the end of failed peatland development project shows that inappropriate and unsustainable forms of peatland management have resulted in degradation of the natural forest vegetation, draw-down of the peat water table, increase of peat surface and air temperatures and recurrent surface and ground fires. Implications of microclimate for possible restoration options.
RESPON PERTUMBUHAN DAN HASIL KEDELAI (Glycine max (L) Merril GALUR GH-63 YANG DIBERI PUPUK HAYATI PADA GAMBUT PEDALAMAN: GROWTH AND YIELD RESPONSE OF SOYBEAN (Glycine max (L) Merril GH-63 STRAINS GIVEN BIOLOGICAL FERTILIZER ON INLAND PEAT Rumbang, Nyahu; Oemar, Oesin; Vetrani Asie, Kambang; Darung, Untung; Riak Asie, Erika; Surawijaya, Panji; Safitri, Wanda
AgriPeat Vol. 26 No. 02 (2025): JURNAL AGRIPEAT Vol. 26 No. 02 September 2025
Publisher : Fakultas Pertanian Universitas Palangka Raya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36873/agp.v26i02.19735

Abstract

The purpose of this study was to study the effect of organic fertilizer on the growth and yield of GH-63 soybeans on inland peat. The peat used was taken from Kalampangan Village and the land conditions had never been used for agricultural cultivation. The study was conducted in the Peat Techno Park area of ​​Palangka Raya University. Using a Completely Randomized Design, with 4 treatments of Rhizoka compound organic fertilizer dosage, namely H0 = 0 g.kg seed-1, H1 = 10 g.kg seed-1, H2 = 20 g.kg seed-1, H3 = 30 g.kg seed-1. Each treatment was repeated 5 times and because there were destructive and non destructive observations, the study was conducted in 2 (two) equal series. Data were analyzed by analysis of variance at the 5% and 1% levels. If the results of the analysis of variance indicate a significant effect, it is continued with the BNJ test at the 5% level. The results showed that treatment H3 = 30 g.kg seed-1 as the best treatment in all parameters, namely leaf area (77.03 cm2), effective root nodule weight (1.015 g), root dry weight (1.04 g), loss dry weight (3.71 g), root extinction ratio (3.64 g), number of seeds (1.98 seeds) and seed weight (1.15 g) compared H0 = 0 g.kg seed-1. The dose dose of biofertilizer is 30 g.kg seed-1 as the best dose for the growth and yield of GH-63 soybean plants on inland peat.
PERTUMBUHAN DAN HASIL BAWANG DAUN (Allium fistusolum) TERHADAP PEMBERIAN PUPUK KANDANG AYAM DAN ZAT PENGATUR TUMBUH PADA TANAH GAMBUT PEDALAMAN: APPLICATION OF CHICKEN MANURE FERTILIZER AND PLANT GROWTH REGULATORS FOR INCREASING THE GROWTH AND YIELD OF LEAF ONION (Allium fistusolum) ON PEAT LAND Abdul Hamid, Syahrudin; Darung, Untung; Taufik Norhidayat, Muhammad; Kresnatita, Susi; Syahid, Abdul; Vetrani Asie, Kambang
AgriPeat Vol. 26 No. 02 (2025): JURNAL AGRIPEAT Vol. 26 No. 02 September 2025
Publisher : Fakultas Pertanian Universitas Palangka Raya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36873/agp.v26i02.22664

Abstract

The purpose of this experiment were to find out the interaction growth and yield of leaf onion (Allium fistusolum) on the giving of chicken manure fertilizer and plant growth regulator on peat land. Tihs study used Completely Randomized design (CRD) of factorial pattern with two factors. The first factor was applying of chicken manure fertilizer (K) consisting of 4 (four) levels, namely : : K0 = 0 ton.ha-1, K1 = 5 ton.ha-1, K2 = 10 ton.ha-1 and 15 t ha-1. The second factor was the provision of concentration growth regulators (Z) which consists of 4 (four) levels, namely : Z0 = 0 ml L-1 water, Z1 = 1 ml L-1 water, Z2 = 3 ml L-1 water and Z3 = 5 ml L-1 water. . The results showed the interaction of chicken manure and growth regulators affected the number of leaves, fresh weight of plants and dry weight of plants. The combination of 10 t ha-1 chicken manure and 5 ml L-1 water growth regulator treatment was able to increase the yield of spring onions with a fresh weight of 32.67 g plant-1.
KARAKTERISTIK SISTEM HYBRID PLTS DAN TURBIN ANGIN HAWT SEBAGAI PEMBANGKIT LISTRIK Jaya, Harie Setiyadi; Perkasa, Petrisly; Darung, Untung; Sukardi, Sukardi; Rahmat, Muhammad Hudan
Steam Engineering Vol. 7 No. 1 (2025): STEAM Engineering, Vol. 7, No. 1, September 2025
Publisher : Program Studi Pendidikan Teknik Mesin, Fakultas Keguruan dan Ilmu Pendidikan, Universitas Palangka Raya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.37304/jptm.v7i1.20308

Abstract

The energy crisis in the coastal areas of Central Kalimantan demands a power generation solution that is independent, reliable, and easily transported. This study aims to develop and test the performance of a portable Hybrid Power Plant (PLTH) prototype that combines solar panels and a Horizontal Axis Wind Turbine (HAWT). The method used is experimental research, including the design, fabrication, and performance testing of the prototype directly in the field. Voltage output measurements were carried out on both energy sources to validate the system's performance under varying weather conditions. The test results show that the prototype successfully operates effectively, where the solar panels produce a peak voltage of 20V in sunny weather and the wind turbine reaches 24V at a speed of 360 rpm. The successful integration of these two sources proves the advantages of a complementary hybrid system, while offering a portable energy solution applicable to remote areas
Chemical Properties of Inland Peat in Horticultural Crops and Oil Palm Plantation, Central Kalimantan Silalahi, Artha Theresia; Yulianti, Nina; Jaya, Adi; Damanik, Zafrullah; Darung, Untung
JURNAL AGRIMENT Vol. 9 No. 2 (2024): Desember 2024
Publisher : Politeknik Pertanian Negeri Samarinda

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.51967/jurnalagriment.v9i2.3175

Abstract

The purpose of the study was to determine the differences in soil chemical properties in horticultural crops and oil palm plantations in Central Kalimantan. The research was conducted in Kalampangan (horticulture) and Tumbang Nusa (oil palm) using quantitative analysis. Soil samples were taken at a depth of 0-30 cm with a soil drill, and data were analyzed by regression and correlation using Microsoft Excel 2022 presented in tables and graphs. The results showed that the chemical properties of peat in the mustard field were classified as low with a pH of 3,98 (very acidic), C-organic content of 53,5% (very high), ash content of 6,3% (low) and moisture content of 159.56% (high). The chemical properties of the peat in the corn field were low with a pH of 3,84 (very acidic), a C-organic content of 54,1% (very high), an ash content of 5.5% (low) and a moisture content of 216,04% (high). The chemical properties of the peat on the oil palm land were low with a pH of 3,41 (very acidic), a C-organic content of 57,5% (very high), an ash content of 0.8% (low) and a moisture content of 242,07% (high). Based on the results of the Correlation Test at the Kalampangan and Tumbang Nusa locations, it was found that there was no difference in the strength of the relationship between variables in both Kalampangan and Tumbang Nusa. Regression test results show that the relationship between C-organic and ash content is negative (opposite). The relationship between C-organic and moisture content is positive (unidirectional). The relationship between C-organic and soil pH is negative (opposite). The relationship between pH and ash content is positive (unidirectional). The relationship between pH and water content is negative (opposite). The relationship between water content and ash content is negative (opposite). The results of the T test on soil pH, C-organic and ash content showed that there was a significant difference between horticultural crops and oil palm plantations, while the results of the T test on soil water content showed that there was no significant difference between horticultural crops and oil palm plantations.
Analisis Konflik Tenurial Hutan Berdasarkan Perubahan Tutupan Lahan di KSA/KPA Bukit Rawi Kabupaten Pulang Pisau Indira, Maulida; Amelia, Vera; Sukarna, R. M.; Susi, Theresia; Anwar, Moch.; Darung, Untung
Innovative: Journal Of Social Science Research Vol. 3 No. 5 (2023): Innovative: Journal of Social Science Research
Publisher : Universitas Pahlawan Tuanku Tambusai

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

MAULIDA INDIRA “Analisis Konflik Tenurial Hutan berdasarkan Perubahan Tutupan Lahan di KSA/KPA Bukit Rawi Kabupaten Pulang Pisau.” (Dibimbing oleh Vera Amelia dan Raden M Sukarna). Penelitian ini bertujuan untuk menganalisis perubahan tutupan lahan tahun 2012 dan 2022 dan kerapatan vegetasi di KSA/KPA Bukit Rawi. Menganalisis permasalahan tenurial di KSA/KPA Bukit Rawi berdasarkan Opened Area yang ada pada peta tutupan lahan tahun 2022. Serta mengkaji keterkaitan antara perubahan tutupan lahan dengan permasalahan tenurial di KSA/KPA Bukit Rawi. Penelitian ini menggunakan beberapa metode diantaranya metode NDVI untuk menganalisis tutupan lahan dan tingkat kerapatan vegetasi, dan metode tumpangsusun (overlay) untuk menganalisa perubahan tutupan lahan konflik tenurial yang terjadi di KSA/KPA Bukit Rawi. Hasil penelitian menunjukan bahwa perubahan tutupan lahan yang dominan adalah perubahan jenis tutupan hutan rawa sekunder yang berubah menjadi area terbuka dan semak belukar, yang menandakan bahwa telah terjadi degradasi lahan. Hasil grondcheck di lapangan pada lokasi opened area ditemukan indikasi konflik tenurial pada 16 (enam belas) titik terdiri dari tambang pasir, kebun sawit, kuburan, kolam, kebun karet dan lapangan latih tembak SPN. Berdasarkan analisis tutupan lahan, konflik tenurial hanya memiliki sedikit kontribusi pada terjadinya degradasi hutan yaitu sebesar 2,05 % dari keseluruhan luas KSA/KPA Bukit Rawi. Adapun penyebab terbesar degradasi hutan di KSA/KPA Bukit Rawi adalah kebakaran hutan yang terjadi pada tahun 2015.
Karakteristik Sifat Fisik Dan Kimia Tanah Pada Kawasan Pasca Tambang Bauksit Di Kabupaten Kotawaringin Timur Provinsi Kalimantan Tengah Budi Gunawan, Agus; Amelia, Vera; Widiastuti, Lusia; Darung, Untung; Damanik, Zafrullah; Sinaga, Soaloon
Innovative: Journal Of Social Science Research Vol. 3 No. 5 (2023): Innovative: Journal of Social Science Research
Publisher : Universitas Pahlawan Tuanku Tambusai

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Abstract

Penelitian ini bertujuan menganalisis sifat fisik dan kimia tanah menurut umur reklamasi dan rona awal lingkungan pada lokasi penelitian yaitu lokasi bekas penambangan bauksit dalam wilayah izin usaha pertambangan PT. Citra Mentaya Mandiri dan PT. Duta Borneo Pratama. Hasil analisa laboratorium terhadap sampel tanah pada 5 (lima) lokasi dengan ketebalan 0-20 cm yakni rona awal, lokasi belum reklamasi, reklamasi 1 tahun, reklamasi 2 tahun, dan reklamasi 5 tahun. Analisis data menggunakan uji sidik ragam dan uji lanjutan BNT (Beda Nyata Terkecil). Hasil penelitian ditemukan perbedaan sifat fisik dan kimia tanah menurut umur reklamasi dan rona awal lingkungan, namun tidak berbeda nyata terhadap kapasitas tukar kation pada lokasi tersebut. Kondisi sifat fisik tanah ditemukan pencampuran antara lapisan tanah atas dengan lapisan tanah bagian bawah akibat penambangan dan penimbunan tanah. Tekstur tanah berupa liat berdebu - lempung berpasir. Struktur tanah berupa gumpal bersudut - gumpal membulat dengan ukuran pasir berdebu dan tingkat perkembangan sukar hancur - mudah hancur. Penurunan bobot isi tanah akibat presentase fraksi, penambahan bahan organik, vegetasi, dan aktivitas fauna yang berbeda. Kondisi sifat kimia tanah yaitu pH tanah tergolong asam berkisar antara 3,71 – 4,91. Penurunan kandungan N-total, P-total, C-organik mengalami penurunan disebabkan karena pH tanah yang asam, kurangnya vegetasi dan bahan organik. Perbedaan nilai Kalium dan Kejenuhan Basa disebabkan jumlah kandungan unsur hara dipengaruhi oleh serapan unsur hara, pencucian, jenis pupuk dan jumlah pupuk yang diberikan. Kapasitas tukar kation bervariasi nilainya tetapi tidak berbeda nyata, diduga karena kekurangan bahan organik pada lokasi reklamasi. Rekomendasi dalam pengelolaan tanah antara lain penambahan bahan organik, vegetasi dan unsur hara agar terjadi proses humifikasi dan dekomposisi tanah dapat meningkat.
Co-Authors Abdul Hamid, Syahrudin Abdul Syahid Abdul Syahid , Abdul Syahid Adi Jaya Adi Jaya Adi Jaya, Adi Adji, Fengky Florante Anastashia, Tefanny Apung Atikah, Titin Budi Gunawan, Agus Cesarianto , Andreyan Chotimah , Hastin Ernawati Nur Chusnul Chotimah, Hastin E.N.C. Damanik, Zafrullah Erina Riak Asie Erlinda Yurisinthae Fauzi, Fouad Felisya, Terisna Fengky F. Adji Fernandes Firmanto, Andris Gaman, Sampang Gumiri, Sulmin Hendrik Segah, Hendrik Herlianur Herlianur Indira, Maulida Inoue, Takashi Irwan Irwan Irwan Sukri Banuwa Jaya, Harie Setiyadi Jemi, Renhart Kadek Malina Silva Kambang Verani Asie Kambang Vetrani Asie Kembarawati, Kembarawati Khairunnisa M.T, Munier Meilantina, Meilantina Moch. Anwar Mofit Saptono Muhammad Hudan Rahmat Nidya Nurmayulis Nyahu Rumbang Oemar, Oesin P, Talulembang Perkasa, Petrisly Rahmawati, Reni Redin, Herry Riak Asie, Erika Rosana Elvince S.A.H.AR, Putra Safitri, Wanda Saputra, Marcelino A. Silalahi, Artha Theresia Sirenden , Ruben Tintin Soaloon Sinaga Sosilawaty Sosilawaty Sudomo, MFA Sukardi Sukardi Sukarna, R. M. Sulistiyanto, Yustinus Surawijaya, Panji Susi Kresnatita Susi, Theresia Sustiyah Sustiyah Suwido Hester Limin Suwido Hester Limin, Suwido Hester Syahrudin Syahrudin Takashi Inoue Taufik Norhidayat, Muhammad Vera Amelia Vetrani Asie , Kambang Vetrani Asie, Kambang Widiastuti, Lusia Y Kharisma Yosep Yosep Yulianti, Nina `Oemar, Oesin