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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 812 Documents
 78   79   80   81   82 
Study of the Quality of Biogeotextile Materials as Semi-Organic Mulch on Saline Land Wijayanti, Fitri; Maroeto, Maroeto; Lestari, Safira Riska; fatiha, Chosa zahro; Sholikah, Dinna Hadi; Ramadhani, Winih Sekaringtyas
JOURNAL OF TROPICAL SOILS Vol. 30 No. 2: May 2025
Publisher : UNIVERSITY OF LAMPUNG

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.5400/jts.2025.v30i2.125-135

Abstract

Degraded land affects almost all ecosystems and can harm the progress and quality of human life, so it needs attention. Saline soil is a land degradation with high salt content that causes toxic effects, increases root osmotic pressure, and inhibits plant growth. One solution is using organic mulch processed into biogeotextiles because it can provide solutions for erosion control and soil stabilization while minimizing negative impacts on the ecosystem. This research was conducted from May to August 2023 in the experimental garden of the Faculty of Agriculture UPN ‘Veteran’ East Java. This study used a group randomized design with one factor,  the type of geotextile material consisting of reed grass (RG), straw (ST), pandanus odorifer (PO), and sugarcane bagasse (SB). This research was conducted with a litterbox of 20x20 cm filled with 100 g of biogeotextile material. The results obtained show that pandanus odorifer biogeotextile material is the best biogeotextile material because it can last a long time on the soil surface, but can still be adequately mineralized, according to the results obtained, reducing the C/N ratio and C-Organic but increasing total nitrogen. Decomposition is closely related to the materials’ quality rather than external factors. The quality of the material, namely lignin, organic carbon, C/N ratio, and nitrogen, influences the decomposition process. Furthermore, this technology can be applied to improve soil productivity and to keep soil healthy.
The Influence of Organic and Inorganic Amendments on Phosphorus Chemistry in Two Acidic Soils of Southwestern Ghana Victor, Owusu-Gyimah; Klogo, Phanuel Yao; Gbefo, Francis
JOURNAL OF TROPICAL SOILS Vol. 30 No. 1: January 2025
Publisher : UNIVERSITY OF LAMPUNG

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.5400/jts.2025.v30i1.17-24

Abstract

A study in southwestern Ghana compared the effects of organic and inorganic additives on P availability and related factors in two acidic soils, Ankasa and Abenia. Different amounts of P as KH2PO4 were applied: 0.067 g kg-1 for Abenia and 0.041 g kg-1 for Ankasa. Soil samples were treated with cow dung, Chromolaena odorata, and poultry droppings for six weeks to increase standard P requirement and neutralize exchangeable Aluminum. Data analysis was performed using GenStat (version 14). An analysis of variance (ANOVA) was conducted for the soil amendments, followed by Tukey’s comparison test at a 5% significance level to identify significant differences among the soil amendments. The result showed that higher rates of organic amendments significantly increased pH, available P (Bray 1 and NaHCO3-P), NaOH-P, and reduced exchangeable Al concentration. Poultry droppings and cow dung impact notably improved soil quality. At the same time, CaCO3 had similar effects on soil pH. However, it did not significantly affect P availability or NaOH-extractable P. CaSO4 and CaCO3 had minimal impact on phosphorus distribution, suggesting that altering pH or exchangeable Al does not necessarily change P fractions. Poultry droppings, rich in P, could be a potential alternative to lime in enhancing P availability and reducing soil acidity.
Effect of Premium Compost on Soil Carbon Microbial Biomass in Pineapple Plants on Marginal Land Central Lampung Yusnaini, Sri; Aditya, Dinar; Ramadhani, Winih Sekaringtyas; Novpriansyah, Hery; Dermiyati, Dermiyati; Rivaie, Arivin
JOURNAL OF TROPICAL SOILS Vol. 29 No. 3: September 2024
Publisher : UNIVERSITY OF LAMPUNG

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.5400/jts.2024.v29i3.135-141

Abstract

Acidic soil reactions, low nutrient content, low organic carbon levels, and low soil biodiversity characterize marginal land. Adding organic matter, such as compost, is expected to rehabilitate these lands. One key biological indicator of successful land rehabilitation by adding organic matter or compost is soil carbon microbial biomass (SCMB). This study aimed to assess the effect of compost on SCMB in pineapple plants. It was designed using a Randomized Completely Block Design with four treatments: Control (P0) = Without compost (Pineapple Cultivation Standard at GGPC), P1 = Cow dung compost (50 Mg ha-1), P2 = Premium compost A (50 Mg ha-1) and P3 = Premium compost B (50 Mg ha-1). Each treatment was replicated four times. The data were analyzed using ANOVA at the 5% significance level, following testing for homogeneity of variance using the Bartlett test and additivity with the Tukey test. Different treatment means were examined using contrast orthogonal tests, and correlation tests were performed to explore relationships among key variables. Results indicated that cow dung and premium compost (A and B) increased SCMB by 89.31% and 84.06%, respectively, at 15 and 16 MAP observations. At 16 MAP observations, soil organic carbon and soil pH were correlated with SCMB; in contrast, at observations 13, 14, and 15 MAP, soil organic carbon, soil pH, soil moisture, and soil temperature did not correlate with SCMB.
Application of Rice-Husk Biochar to Coarse-Textured Ultisols and the Effects on Soil Fertility Indicators at Different Amendment-to-Sampling Intervals Ebido, Nancy Ekene; Awaogu, Chukwuebuka Ebuka; Akubue, Jacinta Chinonso; Ozongwu, Ogorchukwu Valeria; Unagwu, Benedict Onyebuchi; Obalum, Sunday E.; Igwe, Charles Arizechukwu
JOURNAL OF TROPICAL SOILS Vol. 30 No. 2: May 2025
Publisher : UNIVERSITY OF LAMPUNG

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.5400/jts.2025.v30i2.69-83

Abstract

The low fertility status of the highly weathered tropical soils offers the opportunity to study the potential and optimum application rate of biochar as an organic soil amendment, especially for the dominant coarse-textured Ultisols. Despite the relatively fast mineralisation of organics in these soils and the need to synchronise nutrient release crops critical stages of nutrient requirement, the time corresponding to peak effects of biochar remains unclear. The effects of rice-husk biochar (RHB) on the soil fertility of sandy-loam Ultisols at 0, 7.5, 15, 30, and 60 Mg ha-1 equivalents in 2-kg soils were assessed at 0, 2, 4, 8, and 12 weeks of incubation (WOI). Treatments were prepared in batches to enable concurrent sampling for all five incubation intervals. The RHB enhanced soil fertility across the incubation intervals, with optimal rates as 15 Mg ha-1 for soil pH and 30 - 60 Mg ha-1 for macronutrients availability. Relative to the its non-application, RHB increased soil pH-H2O, total N, available P, exchangeable bases, exchangeable acidity, apparent CEC and base saturation by 4-30%, 43-100%, 30-202%, 13-240%, 14-675%, 21-126% and 7-82%, respectively. Soil pH tended to decrease after, while available P progressively decreased before 8 WOI, when treatment effects were generally most pronounced. At an all-encompassing optimal rate range of 30-60 Mg ha-1, RHB could reduce soil acidity and enhance the macronutrient status of coarse-textured Ultisols over at least 12 weeks, soil fertility restoration effects of which are likely to be most pronounced around 8 weeks.
The Dynamics of Soil Organic Matter Fractions in Cacao-Based Agroforestry Systems Sari, Rika Ratna; Sapulete, Carla Leany; Saputra, Danny Dwi; Hairiah, Kurniatun
JOURNAL OF TROPICAL SOILS Vol. 30 No. 2: May 2025
Publisher : UNIVERSITY OF LAMPUNG

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.5400/jts.2025.v30i2.103-112

Abstract

Soil degradation is an important problem affecting crop production, especially in cocoa agroforestry systems, where soil health is crucial for optimal results. However, the effect of land management on changes in soil organic matter (SOM) content is often not visible through measurements of total soil organic carbon (SOC) content. This study investigates the distribution of soil organic matter fractions across various land-use gradients and soil depths in cacao-based agroforestry landscapes in Southeast Sulawesi, Indonesia. Soil samples were collected from three villages representing different parts of a watershed and subjected to density fractionation to separate light (LF), intermediate (IF), and heavy (HF) fractions. Our results indicate that remnant forests (RF) maintain higher total SOM fractions, followed by cacao-based complex and simple agroforestry (CAF, SAF), particularly in the 0-10 cm soil depth. In contrast, annual crops (CR), exhibit the lowest SOM fractions. Standing litter and decomposition rates significantly influence the LF, while HF shows minimal variation across land-use systems, suggesting long-term stability. The LF also strongly correlates with SOC content, highlighting its responsiveness to recent organic inputs. The findings underscore the importance of diverse litter inputs and tree diversity in enhancing SOM fractions and SOC content in agroforestry systems. The study concludes that complex cacao-based agroforestry systems can effectively mimic natural forest conditions, promoting soil health. These insights provide valuable knowledge for sustainable land management practices to mitigate soil degradation and improve soil quality in cacao production systems.
Spatial Distribution of Soil Properties and Soil Fertility Status in the Paddy Rice Field of Oransbari Hastuti, Irena Tri; Djuuna, Irnanda Aiko Fifi; Baan, Samen; Bachri, Samsul; Kubangun, Siti Hajar; Musaad, Ishak
JOURNAL OF TROPICAL SOILS Vol. 30 No. 2: May 2025
Publisher : UNIVERSITY OF LAMPUNG

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.5400/jts.2025.v30i2.61-68

Abstract

Soil properties and soil fertility status of paddy rice fields are considered important factors related to the yield and production of rice; therefore it is essential to understand those properties across the farm.  The objectives of this research is to quantify the soil properties and soil fertility status of paddy-rice soil and their spatial variability in Oransbari. Forty-two composite soil samples (0-30 cm) were taken across paddy rice fields and analyzed for soil chemical properties and fertility status.  Geostatistical analysis and ordinary kriging interpolation methods were used to quantify soil variability and its fertility status across the farm.  The results showed that total soil Nitrogen ranges from 0.11% to 0.17%), organic-C (1.47-6.94%), C/N ratio (11-47), total-P (13-99 mg 100 g-1), available-P (30-227 mg kg-1), total-K (27-54 mg 100 g-1), soil pH (5.83-6.93), base saturation (70-100%), and CEC is 30.51-51.23 me 100 g-1. The spatial variability of all soil characteristics exhibited medium and fit the stable model, except for available Phosphorus and Potassium.  Most rice paddy fields in Oransbari showed high soil fertility status, which indicated that high-yield rice production can be achieved for this region, however, land management factors should be considered for sustainable land use.
The Influence of Compost and Biochar on the Physico-Chemical Properties of Soil and the Growth of Tomatoes in Sub-Optimal Land Endriani, Endriani; Sa’ad, Asmadi; Listyarini, Diah
JOURNAL OF TROPICAL SOILS Vol. 30 No. 2: May 2025
Publisher : UNIVERSITY OF LAMPUNG

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.5400/jts.2025.v30i2.85-95

Abstract

This study seeks to evaluate the effectiveness of coconut shell biochar (CB)  and/or Leucaena compost (LC) as ameliorants in improving soil chemical and physical properties, as well as enhancing tomato yields. The goal is to identify the most effective combination of ameliorant formulations that can improve land quality and increase yield of tomato. The study was carried out over a 10-month period, spanning from March 2024 to December 2024. The research method used a Group Random Design, the treatments studied were: A0: no ameliorant + inorganic fertilizer as recommended;   A1 :  CB 15 Mg ha-1;   A2 :  LC 15 Mg ha-1;   A3 : LC 5 Mg ha-1 + CB  10 Mg ha-1;   A4 : LC 10 Mg ha-1 + CB 5 Mg ha-1. All treatments were repeated 5 times.  The data obtained from this study were subjected to statistical analysis and further evaluated using the Duncan’s New Multiple Range Test (DNMRT). The findings reveal that applying coconut shell biochar and Leucaena compost, whether individually or in combination, markedly enhances the physical properties of the soil. These improvements include reduced bulk density (BD), increased soil organic matter SOM), total porosity (TP), and hydraulic conductivity (HC), as well as better pore distribution and water retention. Furthermore, these treatments resulted in an increase in both the tomato weight per plant and the fresh tomato weight per plot. The most effective combination for maximizing tomato yield was determined to be 10 Mg ha-1 of LC combined with 5 Mg ha-1 of CB.
The Effect of Planting Media on Several Chemical Properties of Soil and Growth of Moringa Stem Cuttings (Moringa oleifera Lam.) Wahdah, Rabiatul
JOURNAL OF TROPICAL SOILS Vol. 30 No. 3: September 2025 (in Progress)
Publisher : UNIVERSITY OF LAMPUNG

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.5400/jts.2025.v30i3.%p

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 Province. 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 were as follows: m0 (Control): 6 kg peat soil, m1: 5 kg peat soil + 1 kg husk charcoal, m2: 5 kg peat soil + 1 kg laying hen manure, m3: 5 kg peat soil + 0.5 kg husk charcoal + 0.5 kg laying hen manure. The results showed that the planting medium 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 and can increase the pH of peat soil from acid to neutral. The treatment also had a very significant effect on the growth of shoot length, number of leaf stalks, root length and root volume of Moringa stem cuttings. It can be suggested that the best planting medium for the growth of Moringa plants is to provide 0.5 kg of husk charcoal + 0.5 kg of laying hen manure on peat soil.
Influence of Land Use and Land Cover Variations on Soil Carbon Sequestration Potential in the Northern Madhupur Tract, Bangladesh Farukh, Murad Ahmed
JOURNAL OF TROPICAL SOILS Vol. 30 No. 3: September 2025 (in Progress)
Publisher : UNIVERSITY OF LAMPUNG

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.5400/jts.2025.v30i3.%p

Abstract

AbstractThis 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 gcm⁻³) and the highest in protected areas (1.97–2.20 gcm⁻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 tha⁻¹) and built-up areas (134.04 tha⁻¹). Corresponding CO₂ mitigation potentials were 508.93 t C ha⁻¹ and 491.34 t C ha⁻¹. Agricultural land had the lowest SOC stock (85.31 tha⁻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 (in Progress)
Publisher : UNIVERSITY OF LAMPUNG

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.5400/jts.2025.v30i3.1

Abstract

Oil palm plantations are a leading sub-sector in Indonesia's agricultural sector which is experiencing rapid growth. Ketapang Regency, as the area with the largest oil palm plantation area in West Kalimantan, has great potential for further development. This study aims to analyze the suitability of land for oil palm plantation development using the Multi-Criteria Decision Making (MCDM) approach integrated with the Geographic Information System (GIS). The Analytical Hierarchy Process (AHP) method is used to determine the weight and value of subcriteria that affect land suitability. The criteria used include slope, land cover, spatial pattern, soil texture, effective depth, drainage, temperature, rainfall, and distance from the road. The results of the analysis show that most of the Ketapang Regency (79.56%) is included in the S1 (highly suitable) and S2 (suitable) categories, with the dominance of the S2 category (67.11%). However, only 3.17% of the regions met the S1 category, while most of the regions (23.29%) were in the S2 category. The results of the overlay with the Regional Spatial Plan (RTRW) and existing land use show that most of the appropriate areas are located outside the protected area. This study concludes that Ketapang Regency has great potential for the development of oil palm plantations, but development must consider regulations and environmental impacts. Further research recommendations include an evaluation of the socio-economic impacts, biodiversity, and climate change on the sustainability of oil palm plantation development in Ketapang Regency

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