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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 5 Documents
 1 
Search results for , issue "vol. 31 no. 2: may 2026" : 5 Documents clear
Land Evaluation and Suitability for Development of Sorghum (Sorghum Bicholor L.) on Peat Land Juniarti Juniarti; Nofrita Sandi; Afrima Sari; Asdi Agustar; Dyah Puspita Sari
JOURNAL OF TROPICAL SOILS Vol. 31 No. 2: May 2026
Publisher : UNIVERSITY OF LAMPUNG

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.5400/jts..v31i2.83-91

Abstract

Sorghum (Sorghum bicolor L.) is an annual cereal crop with high adaptability to marginal and acidic environments, making it a promising option for peatland development in Indonesia. This study evaluated land suitability for sorghum cultivation in West Sumatra, Indonesia, using purposive sampling and field survey methods at the regency scale, in accordance with the FAO land evaluation criteria. Land characteristics were analyzed based on climatic, soil, and hydrological parameters. The results show that three peatland types in the study area are classified as moderately suitable with nutrient retention limitations (S2nr). These peatlands are characterized by average temperatures of 25–27 °C, annual rainfall below 2,000 mm, relative humidity below 75%, good drainage, peat depths exceeding 60 cm, and acidic soil conditions (pH 4.4–5.1). Low availability of nitrogen, phosphorus, and potassium was identified as the primary limiting factor for sorghum cultivation. Overall, the findings indicate that peatlands in West Sumatra have substantial potential for sustainable sorghum development, provided that appropriate soil fertility and nutrient management strategies are implemented.
Modification of Peatlands Amendment with Dolomite and Fly Ash Zulkarnaini Zulkarnaini; Irfan Suliansyah; Gusmini Gusmini; Syafrimen Yasin
JOURNAL OF TROPICAL SOILS Vol. 31 No. 2: May 2026
Publisher : UNIVERSITY OF LAMPUNG

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.5400/jts..v31i2.45-55

Abstract

High acidity levels and low availability of alkaline elements such as Ca, Mg, and K inhibit plant growth and reduce land productivity. This study examined the effect of dolomite and fly ash doses on the chemical properties of peatland. This study used a 2 × 3 factorial randomized block design (RBD) with three replicates. The first factor was the type of soil conditioner, namely dolomite and fly ash. The second factor was the soil conditioner dose, namely 5, 10, and 15 t ha-1. The type of soil ameliorant did not interact significantly with the dose of soil conditioner for pH, water content, organic C, total N, K, P, Fe, Cu, Zn, Mg, Ca, K-exch, and humate. Dolomite was superior in increasing base elements (Ca, Mg, and K) and the humification process of organic matter, while fly ash played an important role in increasing microelements (Fe, Cu, Zn) and carbon stabilization. Meanwhile, an ameliorant dose of 15 t ha-1 significantly increases pH, moisture content, organic carbon, and macronutrients (P and K). Dolomite and fly ash at an optimal dose of 15 t ha-1 are recommended as a sustainable amelioration strategy to increase pH, chemical fertility, and carbon stability in peat soils without causing negative environmental impacts.
Effect of Amendments on Soil Charge Characteristics in Sub-Optimal Dryland of Aceh Besar, Indonesia Sufardi Sufardi; Teti Arabia; Khairullah Khairullah; Tri Chairina
JOURNAL OF TROPICAL SOILS Vol. 31 No. 2: May 2026
Publisher : UNIVERSITY OF LAMPUNG

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.5400/jts..v31i2.93-104

Abstract

Soil colloids play a critical role in controlling chemical behavior, particularly in tropical sub-optimal drylands dominated by variable-charge soils. However, information on the comparative effects of organic and inorganic amendments on soil charge characteristics across different soil orders remains limited. This study aimed to evaluate the effects of compost, biochar, CaCO3, and Superphosphate fertilizer (SP-36) on the charge characteristics of tropical dryland soils. Nine amendment combinations were applied to topsoil (0–20 cm) from Andisols (Saree), Inceptisols (Cucum), and Ultisols (Jantho), followed by incubation for 60 days at 25–27 °C under field capacity conditions. Soil charge parameters were analyzed before and after incubation. Results showed that amendment type and rate significantly affected soil charge characteristics, with responses varying among soil orders. Organic amendments (15–30 t ha-1) and SP-36 (2–4 t ha-1) decreased pH€  and significantly increased cation exchange capacity (CEC) and net negative charge, indicating improved soil reactivity. In contrast, CaCO3  increased pHo  and reduced negative charge. These findings support the strategic use of organic amendments to enhance soil fertility and sustainability.
Land Suitability Evaluation for Sugarcane (Saccharum officinarum L.) Cultivation in the Rejoso Watershed, Pasuruan Regency Bambang Hermiyanto; Ani Acfiyatul Fardila; Cahyoadi Bowo; Basuki; Subhan Arif Budiman
JOURNAL OF TROPICAL SOILS Vol. 31 No. 2: May 2026
Publisher : UNIVERSITY OF LAMPUNG

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.5400/jts..v31i2.57-69

Abstract

Land suitability evaluation is essential for optimizing crop productivity and promoting sustainable land use. In the Rejoso Watershed, Pasuruan Regency, sugarcane production remains suboptimal due to limited integration of biophysical land characteristics into cultivation management. This study aims to assess land characteristics, classify land suitability, identify limiting factors, and provide land management recommendations for sugarcane cultivation. The analysis considered key variables including temperature, rainfall, drainage, soil texture, effective depth, cation exchange capacity (CEC), base saturation, pH (H2O), organic carbon, total nitrogen, available phosphorus (P2O5), available potassium (K2O), slope, erosion risk, and flood risk. Land suitability was evaluated using a matching approach based on the Buku Pedoman Penilaian Kesesuaian Lahan Komoditas Strategis Year 2016. The results showed that actual land suitability comprises class S3 (Marginally Suitable), covering 22.262 ha (64.3%), and class N (Not Suitable), covering 12.342 ha (35.7%). Potential land suitability includes class S2 (Moderately Suitable), covering 8.562 ha (24.7%); class S3, covering 13.701 ha (39.6%); and class N, covering 12.342 ha (35.7%). The main limiting factors identified were temperature, drainage, soil texture, effective depth, nitrogen, phosphorus, base saturation, slope, erosion risk, and flood risk. Recommended management strategies include improving drainage using the Reynoso system, applying dolomitic lime, and SP36 fertilizer. Overall, the Rejoso Watershed demonstrates substantial potential for sugarcane development through improved land management. contributing to national sugar self-sufficiency.
Maize nutrient translocation on artisanal gold mining soil ameliorated with EFB compost, clay, and lime Deno Okalia; Iskandar; Budi Mulyanto; Untung Sudadi
JOURNAL OF TROPICAL SOILS Vol. 31 No. 2: May 2026
Publisher : UNIVERSITY OF LAMPUNG

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.5400/jts..v31i2.71-81

Abstract

Artisanal gold mining generally produces coarse-textured soils with low nutrient-holding capacity, which limit plant growth and productivity. Soil reclamation in these conditions necessitates not only improved soil quality but also effective nutrient uptake and allocation within the plant. This study aims to evaluate the effects of oil palm empty fruit bunch (EFB) compost, clay soil, and lime, used as soil conditioners, on the concentrations of N, P, and K in various maize organs grown in soil formerly used for artisanal gold mining. The study was conducted in experimental pots using a completely randomized factorial design (CRF) with three factors: A) EFB compost at 6, 12, and 18 t ha-1; B) clay at 10 and 20%; and C) lime at 0.5 and 1.0 t ha-1. After harvest, maize plants were separated into roots, stems, leaves, and grain, and tissue concentrations of N, P, and K were determined. The results showed clear organ-specific patterns of nutrient accumulation. The highest N concentration was found in the grain (1.95%), the highest P in the roots (0.37%), and the highest K in the leaves (3.07%), all under treatment A3B1C1 (18 t ha-1 of EFB compost, 10% clay, and 0.5 t ha-1 of lime). The findings suggest that using EFB compost, clay soil, and lime together can effectively improve nutrient availability, uptake, and partitioning in maize grown on post-gold mining soil. This strategy has the potential to support the productive reuse of degraded artisanal gold mining land.

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