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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.
Pengaruh Lama Inkubasi Kompos Limbah Sayur dan Pupuk Kandang Ayam Terhadap Serapan Hara NPK Tanaman Jagung (Zea Mays L.) di Tanah Ultisol Widaryadi, Hanifa Fauziyya; Manurung, Rinto; 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.v12i1.105859

Abstract

Ultisol is a highly weathered soil with low fertility that limits crop productivity. Organic matter amendment improves soil chemical properties; however, the optimal incubation period to ensure full nutrient availability and uptake remains uncertain. This study aimed to determine the effect of incubation duration of vegetable waste compost and chicken manure on N, P, and K uptake and yield of maize (Zea mays L.) in Ultisol, and to identify the most effective incubation period. The experiment was conducted at the Experimental Garden and Soil Chemistry and Fertility Laboratory, Faculty of Agriculture, Universitas Tanjungpura, using a Completely Randomized Design with six incubation durations, namely 1, 2, 3, 4, 5, and 6 weeks and four replications, yielding 24 experimental units. Each unit consisted of 10 kg Ultisol amended with 255 g vegetable waste compost and 225 g chicken manure. Parameters measured included N, P, and K uptake. Data were analyzed by ANOVA and DMRT post-hoc test at 5% significance level. Results showed that incubation duration had no significant effect on nutrient uptake. The highest mean uptake was N 3.14 g/plant, P 2.34 g/plant, and K 2.09 g/plant. Period of 6-week incubation is demonstrated the best overall performance. Keyword: Chicken Manure, Corn, Incubation, Ultisols, Vegetable Waste Compost
Sifat Fisika Tanah Ultisol pada Perbedaan Kelas Lereng dan Penggunaan Lahan di Desa Amboyo Inti Kecamatan Ngabang Ramadani, Riski; Junaidi, Junaidi; 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.v12i1.105953

Abstract

Ultisol is an old soil with a dense argillic/illuviation horizon, intense leaching, a thin top layer, low fertility, and degradation. Ultisol soils are commonly found in West Kalimantan and generally have limited soil physical properties. Differences in slope classes and land use also play a role in determining soil physical properties. This study aims to analyze the comparison of Ultisol soil physical properties at different slope classes (8-15% and 15-30%) and land use (oil palm and secondary forest) in Amboyo Inti Village, Ngabang District. The study used a diagonal method consisting of 5 sample points on each land with different slopes. The soil samples taken included intact soil samples, disturbed soil samples, and intact aggregate soil samples. Data analysis used the Two-Way ANOVA test and if significantly different, continued with the LSD test. The results showed that the two-way ANOVA analysis showed a significant effect of the slope interaction treatment with the land on the parameters of soil bulk density and total soil porosity. Then, the two-way ANOVA analysis showed a significant effect of the land treatment alone on the parameters of soil aggregate stability. Meanwhile, the results of the two-way ANOVA analysis that did not have a significant effect were found in the parameters of field capacity water content, soil permeability, and texture of 3 fractions, namely sand, silt, and clay. The results of the chemical property analysis, namely soil pH in oil palm land and secondary forest with slopes of 8-15% and 15-30% respectively, were included in the acid criteria. C-organic in oil palm land and secondary forest with slopes of 8-15% and 15-30% respectively were included in the low criteria and the organic matter content was included in the medium criteria. Keyword: Oil Palm, Secondary Forest, Slope 8-15%, Slope 15-30%, Ultisols
Korelasi Fraksi Tekstur dan Kadar Air Kapasitas Lapangan Entisols Lahan Pasang Surut di Kelurahan Sedau Kota Singkawang Mirza, Tengku Nafisa Tahira; Suryadi, Urai Edi; 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.v12i1.106169

Abstract

Entisols of the Psamment suborder typically exhibit a predominantly sandy texture, low organic matter content, and poorly developed soil horizons. However, field observations in South Singkawang revealed that soils in the area frequently become waterlogged following rainfall, suggesting the influence of other physical factors—such as a dominance of fine fractions or an impermeable layer—on soil water dynamics. This study aimed to examine the correlation between soil textural fractions and field capacity moisture content in tidal-influenced Entisols in Sedau Urban Village, Singkawang City, by analyzing soil physical and chemical properties. Soil samples were collected from paddy fields and shrubland areas using a random sampling method across 14 observation points. Analyzed parameters included textural fractions, bulk density, total porosity, permeability rate, soil pH, redox potential, and organic carbon content. The samples were analyzed using regression, correlation tests, and paired tests. The results indicate that soil textural fraction composition influences field capacity moisture content in the tidal Entisols of Sedau Urban Village, Singkawang City. Soils with high sand content tend to have lower water-holding capacity, whereas increased silt and clay fractions contribute to higher soil water retention. These findings demonstrate that soil textural fractions are a critical factor determining the soil's capacity to retain water at field capacity. Keyword: Entisos; Texture Fraction; Tidal Land; Water Content
Co-Authors Arief, Fiera Budiarsyah Bambang Widiarso Denah Suswati Gusnidar, G Junaidi Junaidi Kusuma, Eka Widiyawati Wijaya Mahardika, Rabbirl Yarham Manurung, Rinto Mirza, Tengku Nafisa Tahira Muhamad Noor Azizu, Muhamad Noor Murni, Sri Dewi Nuriman, Muhammad Ramadani, Riski rini hazriani Rossie Wiedya Nusantara Siregar, Hummaira Hasnaya Sulakhudin Sulakhudin Sulakhudin Syafrimen Yasin U Edi Suryadi Widaryadi, Hanifa Fauziyya Wirantara, Fathan Madilla