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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. 29 No. 3: September 2024" : 7 Documents clear
The Effect of Trichoderma on N, P, K Soil and Corn Plants Syamsiyah, Jauhari; Hartati, Sri; Herdiansyah, Ganjar; Maro'ah, Siti; Nurrahma, Rizkia Aufa
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.v29i3.159-166

Abstract

The use of Trichoderma is one effort to manage healthy and environmentally friendly plants. This fertilizer is part of organic fertilizer; which farmers do not widely practice yet. This fertilizer has an impact that can increase nutrients and soil fertility. This study examined the impact of using Trichoderma in combination with NPK fertilizer on soil nutrient, nutrient uptake, and growth of corn plants. A Completely Randomized Block Design consisting nine treatments with three replicates was applied. The treatments were Control (A), standard NPK (Urea 350 kg ha-1, SP-36 200kg ha-1 and KCl 75kg ha-1) (B), ¼ NPK + 5 kg ha-1 Trichoderma (C), ½ NPK + 5 kg ha-1 Trichoderma (D), ¾ NPK + 5 kg ha-1 Trichoderma (E), 1 NPK + 5 kg ha-1 Trichoderma (F), ¾ NPK +1.25 kg ha-1 Trichoderma (G), ¾ NPK +2.5 kg ha-1 Trichoderma (H), ¾ NPK + 3.75 kg ha-1 Trichoderma (I). The results showed that NPK fertilizer accompanied by Trichoderma increased soil total N by 84.21%, available P by 36.25%, and available K by 142.22%. The same treatment also increased corn plants’ N, P, and K nutrients by 52.71%, 106%, and 61.53%. The growth of maize plants from applyingTrichoderma up to 5 kg ha-1 has not reduced the use of NPK fertilizer yet. However, applying Trichoderma could improve soil fertility.
Selective abiotic and biotic stressors influence the acdS gene abundance in the rhizospheric soil of pineapple plants in Lampung, Indonesia Jaya, Dori Kusuma; Giyanto, Giyanto; Nurhidayat, Novik; Antonius, Sarjiya
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.v29i3.149-157

Abstract

Indonesia has faced extensive poor soil quality and health for years.Anthropogenic, climatic, and plant pathogenic activities are the major contributing factors that degrade the soil's essential life-supporting system, such as the functional gene pool. One such gene is the rhizobacterial acdS, which codes for synthesizing the ACC (1-aminocyclopropane-1-carboxylate) deaminase that cleaves ACC as an ethylene hormone precursor in the stressed plant growing under stressful conditions. This study aims to investigate the abundance of the acdS gene in different abiotic and biotic stressors of the rhizospheric soil of pineapple plantation area that has been exposed incidentally to herbicides, flooding, and pathogenic Phytophthora spp infections. Soil samples were collected by using simple randomized sampling. A quantitative real-time polymerase chain reaction (qPCR)-based method was applied to assess the gene abundance. This study reveals that the abundance of acdS in the rhizospheric soil of herbicide-treated and Phytophthora-infected symptomatic plants is relatively lower than that of non-treated ones. The highest abundance was found in the Phytophthora-infected soil of asymptomatic plants. However, there was no significant difference in abundance between the fflooded rhizospheric soil TO rhizospheric soil of flooded-exposed plants and the non-exposed ones. Hopefully, this data will help us better understand proper land-use management practices for pineapple plants.
Impact of Land Use on Soil Water Retention in Inceptisols of the Upper Konto Watershed Ermawati, Ermawati -; Kusuma, Zaenal; Wicaksono, Kurniawan Sigit
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.v29i3.167-177

Abstract

The Upper Konto Watershed in Malang Regency is an area with various types of land use that have the potential to influence soil physical properties and soil water retention. Soil water retention is the ability of soil to absorb and retain water, which is closely related to the availability of water that plants can utilize. One of the soil types that dominate this region is inceptisol, which can face constraints in water retention, mainly when land use changes or inappropriate management practices occur. This study aims to analyze the impact of different types of land use on soil water retention characteristics in the Inceptisols of the Upper Konto watershed. The research method was conducted through field surveys and laboratory analysis. A survey was conducted on 16 Land Map Units (LMUs) derived from the overlay of land use, soil type, and slope maps. A total of 64 soil samples were collected for laboratory analysis. The observed variables included soil texture, bulk density, particle density, soil porosity, soil aggregate stability, soil organic matter, and soil water retention at pF 0, 2.5, and 4.2. The results revealed that land use types have a significant influence on soil physical properties as well as water retention characteristics. Specifically, it was found that forest land with the Udic Eutrandepts soil type had the highest water retention capability (0.39 cm3 cm-3). In comparison, dry farmland with the same soil type had the lowest water retention capability (0.06 cm3 cm-3). These findings illustrate the stark differences in the ability of soils to retain water between different land use types.
Soil Characteristics and Management of Ultisols Derived from Claystones of Sumatra Pratamaningsih, Mira Media; Hati, Diah Puspita; Erwinda, Erwinda; Muslim, Rufaidah Qonita; Hikmat, Muhammad; Purwanto, Setiyo
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.v29i3.115-125

Abstract

Ultisols are one of the soil types that develop from claystone parent materials and are widely distributed in Indonesia, making them suitable for agricultural land use. Naturally, Ultisols have low soil fertility, such as acidic soil reactions and low base content;  without proper management, they can lead to suboptimal agricultural yields. Therefore, this study aims to determine the physical, chemical, and mineralogical characteristics of Ultisols to formulate appropriate land management practices. Soil samples were collected from Ultisols with claystone parent materials from various regions in Sumatra, Indonesia. Soil profile creation was conducted to observe soil morphology in the field, followed by physical, chemical, and mineralogical analysis in the laboratory. The results showed that the Ultisols studied have a deep solum (90-120 cm), clay texture, and sticky and plastic consistencies. These soils generally have an acidic reaction, low organic C content, low potential P and K contents, low cation exchange capacity, low base saturation, and high Al saturation. The contents of easily weathered minerals, such as orthoclase, biotite, augite, hypersthene, tourmaline, and andalusite, which are essential nutrient reserves, are also generally low. Thus, the Ultisols studied are classified as low fertility soils, requiring specific management practices such as adding lime, organic materials, and soil amendments in a balanced and appropriate manner to achieve optimal yields.
Study of Soil Chemical Properties on Palm Oil Productivity in PT. Gemilang Sejahtera Abadi in East Kalimantan Christian, Bertolomius Medy; Munir, Mochammad; Wicaksono, Kurniawan Sigit
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.v29i3.127-133

Abstract

East Kalimantan is a region that contributes to palm oil production. Industrial development in the area still needs to be improved in some plantations because there is a limiting palm oil productivity. This study examined the chemical properties of the soil on the PT. Gemilang Sejahtera Abadi (GSA) plantation. Observations were made in four fields with the same variety but different productivity levels. Correlation analysis and simple linear regression were used to identify factors influencing productivity. The soil on the plantation land was dominated by Typic Hapludults soil type, included in the Ultisols order. The highest productivity was found in Afdeling 1, 2, and 5, while the lowest was in Afdeling 4. The pH in each afdeling was classified as acidic, and the Organic-C, N, and base saturation contents were low. The CEC in afdeling 1 and 2 was classified as medium, while in afdelings 4 and 5 was low. All correlation analyses showed a positive relationship between the variables and palm oil productivity, with low correlation coefficients for pH, organic-C, N, P, and base saturation. The correlation coefficient between CEC and palm oil productivity has a strong relationship.
Impact of Biofertilizer and Inorganic Fertilizers on Soil Available Phosphorus, Productive Tillers, and Rice (Oryza sativa L.) Yield Ngui, Marianus; Melati, Maya; Muhimmatul, Husna
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.v29i3.143-148

Abstract

The use of Bacillus bacteria as biofertilizers (BF) increases since the detrimental effects of inorganic fertilizers on the agricultural environment spread out. The objective of this research was to study the influence of bio fertilizer and in combination with inorganic fertilizer on the productivity of rice fields. The experiment was a two-factor treatment arranged in a split-plot design with three replications using a randomized complete block design (RCBD). The first factor was fertilizers, which were used as the main plot. The second factor was paddy varieties as a subplot. The results showed that the combination of inorganic and bio fertilizer application of (150 kg NPK ha-1 + 75 kg Urea ha-1 + 4 L BF ha-1) and (300 kg NPK ha-1 + 150 kg Urea ha-1 + 4 L BF ha-1), improved soil available phosphorous (P) of 12.04%, 40.69%, and 44.05%, respectively compared to control treatment, the inorganic fertilizer application (300 kg NPK ha-1 + 150 kg Urea ha-1), and the bio fertilizer application (4 L BF ha-1). In addition, the application of (300 kg NPK ha-1 + 150 kg Urea ha-1 + 4 L BF ha-1) increased productive tillers per plant as 28.13% and 16.48% compared to the control and the inorganic application, respectively. Moreover, by using Mekongga variety, applying the inorganic and bio fertilizer at rates of (300 kg NPK ha-1 + 150 kg Urea ha-1 + 4 L BF ha-1) increased rice yield of 64.08% and 30.33% compared to the control and the inorganic fertilizer application; while, by using IPB 3S variety, the rice yield increased by 85.80% and 10.34%, respectively. These findings are significant as they demonstrate the potential of biofertilizers to enhance soil fertility and rice productivity, thereby advancing sustainable farming practices.
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.

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