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All Journal JTSL (Jurnal Tanah dan Sumberdaya Lahan) Journal of Degraded and Mining Lands Management Gontor AGROTECH Science Journal Jurnal Biologi Tropis Jurnal Ilmu Tanah dan Sumber Daya Lahan Jurnal Pertanian Agros Abditani : Jurnal Pengabdian Masyarakat Jurnal Pengabdian kepada Masyarakat Nusantara Agroteksos
Ulfia Fadilla
Universitas Tanjungpura
Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Computer Science & IT Decision Sciences, Operations Research & Management Economics, Econometrics & Finance Education Environmental Science Immunology & microbiology Social Sciences

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Evaluasi Kesesuaian Lahan Tanaman Kelapa Dalam di Desa Jeruju Besar Kecamatan Sungai Kakap Kabupaten Kubu Raya Wirantara, Fathan Madilla; Hazriani, Rini; Fadilla, Ulfia
Pedontropika: Jurnal Ilmu Tanah dan Sumber Daya Lahan Vol 12, No 1 (2026): Februari
Publisher : Soil Science Department, Faculty of Agriculture, Tanjungpura University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26418/pedontropika.v12i1.101306

Abstract

Jeruju Besar Village in Sungai Kakap District, Kubu Raya Regency, has a coconut plantation managed by the community without considering the suitability of the land to the growing requirements of the plant, resulting in decreased coconut productivity. This study aims to identify land characteristics according to coconut criteria, determine land suitability subclasses, provide suggestions for improvements based on actual limiting factors. The study was conducted in Jeruju Besar Village, Sungai Kakap District, Kubu Raya Regency with an area of 50 ha for 6 months, including field surveys, soil sample analysis in the chemistry and soil fertility laboratory and physics and soil conservation. The grid method was used to determine 10 observation points (1 point represents 5 ha) by taking composite and intact soil samples at a depth of 0–30 cm. The map overlay results show two types of soil: Haplic Sulfaquents and Sulfic Endoaquepts. The actual land suitability of coconut is classified as unsuitable (N1) with the main limiting factors being rainfall, drainage, effective depth, CEC, and flood hazard. The potential is classified as marginally suitable (S2-r) with drainage limitations. Suggested improvements include water management through the construction of drainage channels to control excess water and remove toxins resulting from shallow sulfidic depths, the addition of organic materials to increase the CEC, and land management using the surjan system to overcome flooding.
Groundwater controls on soil–environment variables and carbon risk in smallholder peatland agriculture of West Kalimantan, Indonesia Mahardika, Rabbirl Yarham; Fadilla, Ulfia; Azizu, Muhamad Noor; Siregar, Hummaira Hasnaya
Journal of Degraded and Mining Lands Management Vol. 13 No. 2 (2026)
Publisher : Brawijaya University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15243/jdmlm.2026.132.9773

Abstract

Smallholder agriculture in Indonesia plays an essential role in sustaining local food production and rural livelihoods. However, management practices remain highly variable and frequently lack adequate environmental safeguards. Groundwater table (GWT) is a primary determinant of peat properties and processes. This study examined soil–environment interactions in Kubu Raya, West Kalimantan, under two dominant smallholder land-use systems: mixed crops (MCR) and pineapple monoculture (PNP). Measurements included key biogeochemical indicators, soil properties, and GWT risk score (SGWT) derived from nationally regulated thresholds (25 cm and 40 cm) and an upper limit of 60 cm. Statistical analysis indicated that GWT exerted a significant influence (p<0.05) on soil moisture and temperature, redox potential, and pH in both systems. However, the strength of these responses differed between land uses. SGWT analysis highlighted distinct hydrological contrasts between sites. The mean GWT at MCR (36.18 cm) lies between the 25- and 40-cm thresholds, whereas PNP (46.44 cm) exceeds both. The result showed that MCR accounted for 31.9% of the risk range above 25 cm (SGWTMCR25 = 0.3194), compared with PNP at 61.3% (SGWTPNP25 = 0.6126). When evaluated against the 40-cm threshold, MCR no longer surpasses the limit (SGWTMCR40 = 0), while PNP remains within 32.2% of the 40–60 cm risk interval (SGWTPNP40 = 0.3220). These hydrological differences correspond to higher estimated CO? emission factors in PNP and greater subsidence risk relative to MCR. The results emphasize the need for site-specific assessment to guide GWT-based peatland management for smallholders.
Co-Authors Arief, Fiera Budiarsyah Bambang Widiarso Denah Suswati Gusnidar, G Kusuma, Eka Widiyawati Wijaya Mahardika, Rabbirl Yarham Manurung, Rinto Muhamad Noor Azizu, Muhamad Noor Murni, Sri Dewi Nuriman, Muhammad rini hazriani Rossie Wiedya Nusantara Siregar, Hummaira Hasnaya Sulakhudin Sulakhudin Sulakhudin Syafrimen Yasin Wirantara, Fathan Madilla