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Dermiyati
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Faculty of Agriculture, University of Lampung, Jl. Sumantri Brojonegoro No. 1, Bandarlampung 35145, Indonesia
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INDONESIA
Journal of Tropical Soils
Published by Universitas Lampung
ISSN : 0852257X     EISSN : 20866682     DOI : http://dx.doi.org/10.5400/jts.v25i1
Core Subject : Agriculture, Social,
Agriculture, Biological Sciences & Forestry Environmental Science
Journal of Tropical Soils (JTS) publishes all aspects in the original research of soil science (soil physic and soil conservation, soil mineralogy, soil chemistry and soil fertility, soil biology and soil biochemical, soil genesis and classification, land survey and land evaluation, land development and management environmental), and related subjects in which using soil from tropical areas.
Arjuna Subject : Ilmu Lingkungan (semua ketegori) - Konservasi Alam dan Lahan
Articles 7 Documents
 1 
Search results for , issue "Vol. 30 No. 3: September 2025" : 7 Documents clear
Change of Sandy Soil Chemical Properties with Azolla microphylla and Quail Manure Syamsiah, Jauhari; Herawati, Aktavia; Mujiyo, Mujiyo; Widijanto, Hery; Pangastuti, Triyana Suryaning; Putri, Elvia Febriani
JOURNAL OF TROPICAL SOILS Vol. 30 No. 3: September 2025
Publisher : UNIVERSITY OF LAMPUNG

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.5400/jts.2025.v30i3.147-158

Abstract

Uncontrolled land conversion reduces the available land for plant cultivation. The alternative used for rice cultivation is marginal land, such as sandy soil. However, several constraints led to very low productivity, so it needs proper management, such as adding organic matter. This study aimed to determine changes in the chemical properties of sandy soil treated with Azolla microphylla and quail manure. The pot research was carried out in the Greenhouse of the Faculty of Agriculture, Universitas Sebelas Maret, using a factorial Completely Randomized Design (CRD) with two factors. The first factor consisted of four levels of Azolla microphylla (AM),i.e., (0, 50,100, and 150 Mg ha-1). The second factor was three-level quail manure (QM ), i.e., (0, 20, 40 Mg ha-1). Fresh Azolla microphylla and quail manure were incubated for 14 days under anaerobic conditions. The results showed that applying Azolla microphylla, with or without quail manure, significantly improved the chemical properties of sandy soil. The addition of Azolla microphylla (100 Mg ha-1) with quail manure (40 Mg ha-1) increased organic C, Cation exchange capacity (CEC), available-P, Ammonium, Nitrate, exchangeable-K, Ca, electrical conductivity (EC), and redox potential (Eh).
Assessing the Impact of Terra Preta from Rice Husk on Soil, Rice Plant Growth, and Yield in the System of Rice Intensification (SRI) Adrinal, Adrinal; Gusmini; Putri, Elsa Lolita; Kasim, Musliar; Aprilia Herman, Violin Enghel
JOURNAL OF TROPICAL SOILS Vol. 30 No. 3: September 2025
Publisher : UNIVERSITY OF LAMPUNG

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.5400/jts.2025.v30i3.189-200

Abstract

The practice of intensive rice field cultivation and excessive chemical fertilizer use often leads to gradual declines in soil quality and fertility, as well as environmental pollution. By employing Tetadi as an ameliorant technology and adopting SRI cultivation techniques, we can mitigate the adverse effects on rice fields. This study aimed to examine the effects of Tetadi soil ameliorant on the physical properties of paddy soil, growth, and rice yield using the SRI method. The experiments were conducted in paddy fields in Pasar Ambacang, Kuranji, Padang city. Tetadi soil ameliorant was applied at A=0, B=5, C=10, D=15, and E=20 t ha-1. Data on soil physical properties and plants were statistically analysed using ANOVA. The results showed that the change has an insignificant impact on soil physical properties, yet decreases BD (Bulk Density) by 28.2%; increases SOM (Soil Organic Matter) by 18.55%; TPS (Total Pore Space) by 13.7%, moisture content by 5.6%, permeability by 34.2%, and Available Water Pores (AWT) by 20%—application of 20 Mg ha-1. Tetadi increased the number of productive saplings by 52.65% and yield by 69.46% compared to the treatment without Tetadi application.
The Effect of Planting Media on Several Chemical Properties of Soil and Growth of Moringa Stem Cuttings (Moringa oleifera Lam.) Santoso, Untung; Wahdah, Rabiatul; Cahyanti, Tri Buana
JOURNAL OF TROPICAL SOILS Vol. 30 No. 3: September 2025
Publisher : UNIVERSITY OF LAMPUNG

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.5400/jts.2025.v30i3.137-146

Abstract

This research was conducted to determine the effect of planting media on the growth of Moringa stem cuttings and determine the best planting media for growing Moringa stem cuttings. The research was carried out in July-October 2023. Located on the Wasaka III Student Dormitory grounds, Lambung Mangkurat University, Banjarbaru, South Kalimantan. The research was carried out using a one-factor Completely Randomized Design (CRD) method with four treatments and five replications to obtain 20 experimental units. The treatments given: m0: 6 kg peat soil, m1: 5 kg peat soil + 1 kg husk charcoal, m2: 5 kg peat soil + 1 kg laying chicken manure, m3: 5 kg peat soil + 0.5 kg husk charcoal + 0.5 kg laying chicken manure. The results showed that the planting had a significant effect on soil pH, shoot length, number of leaf stalks, root length and root volume of Moringa stem cuttings. However, it had no real effect on the number of shoots on Moringa stem cuttings. Based on research that has been carried out, it shows that planting media given husk charcoal and manure increases the available P content by 241.34 ppm, N-dd 1.70 me/100 g, and K-dd 1.65 me/100 g in the soil. Peat can increase the pH of peat soil from acid to neutral. The treatment also had a very significant effect to all parameters.
Influence of Land Use and Land Cover Variations on Soil Carbon Sequestration Potential in the Northern Madhupur Tract, Bangladesh Farukh, Murad Ahmed; Tasnim, Nishat; Khatun, Rehana; Ali, Aslam; Rahman, Sadiqur
JOURNAL OF TROPICAL SOILS Vol. 30 No. 3: September 2025
Publisher : UNIVERSITY OF LAMPUNG

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.5400/jts.2025.v30i3.175-188

Abstract

This study examines the effects of diverse land use and land cover (LULC) types on soil physico-chemical properties and carbon sequestration potential in the northern Madhupur Tract, Bangladesh. Soil samples were collected from seven LULC types – sal forest, social forest, orchard, bare land, agricultural land, protected area, and built-up area across three depths (0–15 cm, 16–40 cm, and 41–70 cm) between April and September 2022. Key parameters analyzed included texture, bulk density, pH, electrical conductivity (EC), total nitrogen, available phosphorus, exchangeable potassium, available sulfur, organic carbon (OC), and soil organic carbon (SOC). Soil texture ranged from clay loam to clay. Bulk density was the lowest in built-up areas (1.57–1.62 g cm-³) and the highest in protected areas (1.97–2.20 g cm-³). Orchard soils had the highest surface moisture (23.26%). Surface soils showed the highest EC (0.82 dSm-1), total N (0.11%), available P (118.6 ppm), and OC (1.07%), while pH increased with depth, peaking at 6.15. SOC stock differed significantly among land uses (F = 6.56, p < 0.05), highest in social forests (138.67 Mg ha-¹) and built-up areas (134.04 Mg ha-¹). Corresponding CO‚  mitigation potentials were 508.93 Mg C ha-¹ and 491.34 Mg C ha-¹. Agricultural land had the lowest SOC stock (85.31 Mg ha-¹). Enhancing carbon storage through better land management is vital for sustainability and climate resilience.
Spatial Analysis of Available and Suitable Land for Oil Palm in Ketapang Regency Yuwono, Probo; Widiatmaka, Widiatmaka; Fuah, Asnath Maria
JOURNAL OF TROPICAL SOILS Vol. 30 No. 3: September 2025
Publisher : UNIVERSITY OF LAMPUNG

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.5400/jts.2025.v30i3.201-211

Abstract

Oil palm plantations are a primary sub-sector of Indonesia’s agricultural economy and continue to expand rapidly. Ketapang Regency, which has the largest oil palm plantation area in West Kalimantan, holds significant potential for further development. This study assessed land suitability for oil palm expansion using a Multi-Criteria Decision-Making approach integrated with Geographic Information Systems. The Analytical Hierarchy Process was applied to assign weights to the following criteria: slope, land cover, spatial pattern, soil texture, adequate depth, drainage, temperature, rainfall, and road accessibility. The results show that 79.56% of the total area is classified as suitable (S1 and S2), comprising 3.17% as highly suitable (S1) and 67.11% as suitable (S2). Meanwhile, 7.62% was moderately suitable (S3) and 20.44% was not suitable (N). Overlay analysis revealed that the most suitable lands overlap with Other Use Areas and Conversion Production Forests, while some intersect with existing agricultural and plantation uses. Validation with existing plantation data confirmed that 98.34% of plantations are located in S1 and S2 zones, demonstrating the robustness of the model. Overall, Ketapang Regency has substantial land availability for oil palm expansion. However, the limited extent of highly suitable land (S1) and the predominance of suitable (S2) highlight the need for cautious interpretation of expansion opportunities. Sustainable development must align with spatial regulations, land conversion policies, and environmental safeguards. Future research should integrate socio-economic, ecological, and climate change considerations to support sustainable and resilient oil palm development.
From Rice to Oil Palm: the Historical Evolution of Peatland Reclamation in the Berbak Delta, Indonesia Widjaja, Hermanu; Suwardi; Darmawan
JOURNAL OF TROPICAL SOILS Vol. 30 No. 3: September 2025
Publisher : UNIVERSITY OF LAMPUNG

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.5400/jts.2025.v30i3.213-226

Abstract

The Berbak Delta in Jambi Province, Indonesia, underwent large-scale peatland reclamation in the 1970s as part of a transmigration program to develop rice fields. Initially, rice production averaged 3–4 tons/ha but declined to less than 1 Mg ha-1 due to the conversion of peat soils into acid sulfate soils. This decline was attributed to soil acidification from pyrite oxidation, which lowered soil pH. Currently, rice cultivation persists in areas near rivers influenced by tidal brackish water. In response to declining yields, a technological package for acid sulfate soil management was introduced, including canal water management, pH improvement, and fertilizer application. It increased rice yields to over 5 Mg ha-1 in a 100-ha pilot project in 2005. However, by 2008, farmers began shifting to oil palm plantations due to higher income potential. This study examines land-use change from rice fields to oil palm plantations and its impact on the livelihoods of communities in the Berbak Delta. Land cover change analysis from 2013 to 2023 revealed a decrease in rice fields from 58.30% to 25.79% and an increase in oil palm plantations from 15.37% to 55.70%. Oil palm cultivation has demonstrated sustainability on reclaimed acid sulfate soils, leading to economic prosperity through improved infrastructure and housing, as well as increased private vehicle ownership.
Integrating Soil Properties and Vegetation Indices for Modeling Potato Productivity Sudarto, Sudarto; Putra, Aditya Nugraha; Fauziah, Dwi Christina; Nugroho, Agung; Suryoprojo, Adithya Riefanto; Prasetya, Novandi Rizky; Sugiarto, Michelle Talisia
JOURNAL OF TROPICAL SOILS Vol. 30 No. 3: September 2025
Publisher : UNIVERSITY OF LAMPUNG

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.5400/jts.2025.v30i3.159-173

Abstract

Global potato production reached approximately 383 million metric tons in 2025, with Indonesia contributing around 1.22 million metric tons (0.32% of global output). However, the sustainability of Indonesia’s potato production is increasingly threatened by soil quality degradation in key growing regions. Existing predictive studies have primarily focused on soil chemical properties, with limited incorporation of remote sensing technologies. This study investigates the potential of Unmanned Aerial Vehicle (UAV) as a high-resolution, non-destructive tool for estimating potato yield using vegetation index transformations. Utilizing a split-plot experimental design across elevation gradients, we integrated soil properties with UAV-derived vegetation indices—Visible Atmospherically Resistant Index (VARI), Green Leaf Index (GLI), and Normalized Green-Red Difference Index (NGRDI). Results reveal that total nitrogen, base saturation, and bulk density significantly influence yield variability, and can be accurately estimated using NGRDI, GLI, and a modified GLI (GLI CS), respectively. A multiple linear regression model was developed to predict potato yield = 24.22 + 7.26(NGRDI) + 9.87(GLI) + 28.42(GLI CS). This research demonstrates the efficacy of UAV-based spectral analysis in improving yield-prediction models, offering a scalable, precise approach for sustainable potato cultivation. Future work should incorporate machine learning to improve model robustness and assess applicability across varied agro-ecological contexts.

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