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All Journal Journal of Tropical Soils Prosiding Seminar Nasional Sains Dan Teknologi Fakultas Teknik Jurnal Penelitian Hutan dan Konservasi Alam Journal of Degraded and Mining Lands Management Lumbung Inovasi: Jurnal Pengabdian Kepada Masyarakat Jurnal Agriment Pengabdian Kampus: Jurnal Informasi Kegiatan Pengabdian Pada Masyarakat Prosiding Seminar Nasional Program Pengabdian Masyarakat International Journal of Multidisciplinary Approach Research and Science JSE Journal of Science and Engineering
Adi Jaya, Adi
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Agriculture, Biological Sciences & Forestry Humanities Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Civil Engineering, Building, Construction & Architecture Computer Science & IT Earth & Planetary Sciences Economics, Econometrics & Finance Education Engineering Environmental Science Immunology & microbiology Mechanical Engineering Medicine & Pharmacology Social Sciences Transportation

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Water Retention and Saturation Degree of Peat Soil in Sebangau Catchment Area, Central Kalimantan Sajarwan, Akhmat; Jaya, Adi; Banuwa, Irwan Sukri
JOURNAL OF TROPICAL SOILS Vol. 26 No. 1: January 2021
Publisher : UNIVERSITY OF LAMPUNG

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.5400/jts.2021.v26i1.29-42

Abstract

Water is an essential factor in forming, utilization, management, and sustainability of peat soil. This study was to obtain characteristics of water retention and porosity of peat soil. Peat samples were taken from the Natural Laboratory of Peat Forest, Central Kalimantan at shallow, medium, and deep peat at 0-50cm (surface) and 50-100 cm (subsurface), while laboratory analyses carried out at Soil Laboratory, Universitas Gajahmada. The result shows that volumetric moisture content at the surface lower than subsurface, except for deep peat. The total pore for the surface was 84.67-86.98%, while subsurface layers were 83.53-86.93%. For surface layer, saturated degree (S) medium peat higher than shallow and deep peat, while for shallow subsurface peat higher than medium and deep peat. S value all pF levels of surface for medium and deep peat higher than the subsurface. Bulk density for surface was 0.094g.cm-3 (rb(wet)) and 0.22g.cm-3(rb (dry)) for shallow peat while medium peat are 0.084–0.087g.cm-3(rb(wet)) and 0.18–0.20g.cm-3(rb(dry)), deep peat 0.064–0.090g.cm-3(rb(wet)) and 0.11–0.16g.cm-3(rb(dry)). For subsurface, bulk density of medium peat are 0.094–0.107g.cm-3 (rb(wet)) and 0.16–0.20g.cm-3 (rb(dry)), deep peat are 0.067–0.090g.cm-3 (rb(wet)) and 0.10–0.17g.cm-3 (rb(wet)). The particle density of surface and subsurface for shallow peat higher than medium and deep peat, with values 0.67-0.77g.cm3, 0.61-0.66g.cm3, and 0.53-0.63g.cm3 for shallow, medium, and deep peat, respectively. Total pores for the surface layer decrease with increasing dry bulk density (R = 0.624) and particle density (R = 0.375). This fact seems to confirm a directly proportional relationship between parameters bulk and particle density with total pores.
Application of Biocom-Phosphate Solubilizing Fungi and Coal Fly-Ash to Increase P-Availability of Peat Soil in Kalimantan Ichriani, Gusti Irya; Ifansyah, Hairil; Maulana, Agus; Fauwziah, Ema Rizki; Syifa, Muhammad; Lautt, Bambang Supriyono; Jaya, Adi; Chusnul Chotimah, Hastin Ernawati Nur; Pasaribu, Wiranda
JOURNAL OF TROPICAL SOILS Vol. 27 No. 3: September 2022
Publisher : UNIVERSITY OF LAMPUNG

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.5400/jts.2022.v27i3.111-119

Abstract

The peatlands have the potential to support food security efforts. However, there is have constraints on soil fertility, especially the P nutrients availability. The biotechnology approach, the application of ameliorant (biochar-compost carrier medium (biocom)) enriched with phosphate solubilizing fungi (PSF) and coal fly ash (CFA), was expected to increase the P-availability in peat soils. The research aimed to study the application of biocom enriched with PSF and CFA to increase soil P-availability and plant P-uptake. The study was conducted using peat soil media with the formulation of CFA and biocom enriched with PSF and CFA as treatments. The treatment effect was observed through soil P available and plant P uptake of maize. The results showed PSF application was inconsistent in improving P available in peat soils in Kalimantan. In Central Kalimantan, Biocom + PSF was able to increase P available in peat soils by up to 406.18% (A. oryzae-Tb7) and 353.44% (N. fischeri-Tm8). However, in South Kalimantan P available in peat soil was only 8.04% (A. oryzae-Tb7) and 12.86% (N. fischeri-Tm8). The CFA+ (biocom+PSF) formulation increased P available in Central Kalimantan peat soils, but it was different from South Kalimantan peat soils. The application of biocom+PSF and CFA has not been able to increase the P uptake of maize plant in peatlands of South Kalimantan.
Innovation in Road Construction Materials: A Study on the Combination of Biochar and Cement in Improving Subgrade Bearing Capacity Respati, Rida; Salampak, Salampak; Sarie, Fatma; Jaya, Adi
JSE Journal of Science and Engineering Vol. 4 No. 1 (2025): Journal of Science and Engineering
Publisher : LPPI Universitas Muhammadiyah Kalimantan Timur (UMKT)

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Abstract

Road infrastructure development often faces significant challenges due to low bearing capacity of the subgrade, especially when dealing with peat soil. This condition can lead to excessive settlement, deformation, and premature damage to the road pavement, resulting in high maintenance costs. Peat soil is inherently poor in quality, making it uneconomical to use as a subgrade for road pavements. The condition of peat soil significantly impacts road construction in Central Kalimantan Province. Therefore, one effective way to address this issue is through soil stabilization. This research aims to explore the potential of biochar and cement as stabilizing agents to improve the bearing capacity of peat soil. The study involves a series of laboratory tests, including initial physical property tests of the original peat soil, as well as index and mechanical strength tests after the addition of a combination of biochar and cement. The biochar used in this research is derived from coconut shells.The conducted tests include compaction tests to determine the maximum dry density and optimum moisture content, and CBR (California Bearing Ratio) tests to evaluate the soil's bearing capacity. The variations in biochar and cement addition were: 5% biochar with 5% cement, 5% biochar with 6% cement, 5% biochar with 7% cement, and 5% biochar with 8% cement. The research results indicate that the addition of biochar to peat soil stabilization mixtures using cement significantly increases the CBR value. Specifically, adding 8% cement and 5% biochar to peat soil was able to increase the CBR value by up to 9% from the original soil's CBR of 2.2%. Therefore, it can be concluded that the combination of biochar and cement can transform peat soil into a usable subgrade for road construction
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.
Co-Authors Adji, Fengky Florante Adventa, Alma Agus Maulana Anam, Muhammad Rizqy Anjani, Divanti Sylvia Baba Barus Birawa, Cakra Damanik, Zafrullah Dohong, Salampak Evnaweri Evnaweri Evnaweri, Evnaweri Fadhillah, Azzara Nur Fauwziah, Ema Rizki GUSTI IRYA ICHRIANI, GUSTI IRYA Hairil Ifansyah HASTIN ERNAWATI NUR CHUSNUL CHOTIMAH, HASTIN ERNAWATI NUR Herman Daryono Inoue, Takashi Irwan Irwan Ivone Christiana Kusnendar, Muhamad Lautt, Bambang S. Lautt, Bambang Supriyono Lesmana, Dhia Adi Ludang, Yetrie Maryani Mochamad Anwar Mofit Saptono Muhammad Ardiansyah Nopembereni, Eti Dewi Page, Susan E. Pasaribu, Wiranda Prastiawan, Hendri Puspita, Gita Putri, Safira Nabila Rasidi, Muhammad Rida Respati Rosana Elvince Sajarwan, Akhmat Salampak, Salampak Saragih, Osi Karina Sarie, Fatma Shepiani, Nuril Silalahi, Artha Theresia Sona Suhartana Subianto, Pratiwi Supriati, Lilies Sutriadi, Mas Teddy Suwido Hester Limin, Suwido Hester Syifa, Muhammad Ulfah Juniarti Siregar Untung Darung Upton, Caroline Usup, Sidik R. Utama, Andean Ilham Nuralivian Widiastuti , Lusia Winerungan, Shella Yulianti, Nina