cover
Article Per Year (5 Year)
All
Home Page
OAI Link
Editorial Team
Contact
Reviewer
Google Scholar
Contact Name
Dermiyati
Contact Email
dermiyati.1963@fp.unila.ac.id
Phone
+62721781822
Journal Mail Official
j.tnhtrop@gmail.com
Editorial Address
Faculty of Agriculture, University of Lampung, Jl. Sumantri Brojonegoro No. 1, Bandarlampung 35145, Indonesia
Location
Kota bandar lampung,
Lampung
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
 75   76   77   78   79 
Using Geostatistics for Spatial Analysis of Soil Moisture Content, Electrical Conductivity, and pH at Paddy Fields Wijayanto, Yagus; Kustianto, Muhammad Aldian Dwi; Budiman, Subhan Arif; Purnamasari, Ika
JOURNAL OF TROPICAL SOILS Vol. 28 No. 2: May 2023
Publisher : UNIVERSITY OF LAMPUNG

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.5400/jts.2023.v28i2.47-56

Abstract

Soil is dynamic due to various internal and external processes exerted on the soil, resulting in unique soil characteristics in space in short and long distances. Geostatistics (kriging) is the method of quantifying the spatial variation of soil properties. This research was mainly aimed at applying geostatistics to quantify and interpolate the spatial dependence and structure of three soil properties, namely pH, EC, and Soil Moisture Content (SMC) in a small area. This research was conducted on paddy fields in Mlandingan Kulon Village, Situbondo Regency. Sampling was conducted on an area of   9.2 ha with 31 sample points. Normal data distribution was found for pH and EC, whereas this was not the case for SMC. The results of the analysis showed that most of the pH values   were alkaline (>8), EC values were non-saline (<2 mm/cm), and SMC was in the low category (<20%). The results show that for three soil properties, weak dependencies were observed. The values of Root Mean Square Error (RMSE)  confirmed that kriging with exponential was better compared to the spherical model, resulting in the RMSE of 0.546 (pH), 0.041 (EC), and 1.512 (SMC).
Temporal Changes in Spatial Patterns of Soil Properties During a Period of Rice Growth Wijayanto, Yagus; Anggreini, Rizqi Aprilia Putri; Purnamasari, Ika; Ristiyana, Suci
JOURNAL OF TROPICAL SOILS Vol. 28 No. 1: January 2023
Publisher : UNIVERSITY OF LAMPUNG

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.5400/jts.2023.v28i1.1-8

Abstract

Growing rice is complicated because of the interrelationship among production components, one of which is soil conditions. Determination of soil conditions is usually conducted by employing some soil properties. It is no doubt that soil properties have spatial and temporal characteristics. This research used two soil properties: Electrical conductivity (EC) and pH. This study aimed to use and evaluate Inverse Distance Weighted to uncover the temporal changes in pH and EC during the rice growth period. The methods used in the research were field survey, soil sampling, laboratory analysis, and data processing in Geographical Information Systems (GIS). The sample used was 30 and repeated three times under the growth period (vegetative, generative, and ripening). The results showed that there were changes in pH values of the soil in one growing season, and EC values tend to increase from the vegetative to the ripening period.
Changes of Soil Physical and Chemical Characteristics of Vertisol by Organic Matter and Sands Applications Mindari, Wanti -; Sasongko, Purnomo Edi; Santoso, Setyo Budi
JOURNAL OF TROPICAL SOILS Vol. 28 No. 2: May 2023
Publisher : UNIVERSITY OF LAMPUNG

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.5400/jts.2023.v28i2.79-87

Abstract

Vertisol has a clay texture, high micropores, and high water and nutrient absorption ability. The high water content of Vertisol causes the air to decrease, thus inhibiting root development. Stretching of the Vertisol structure is expected to increase soil porosity and reduce ion and water absorption. This study examines interactions between organic matter and percent sand on soil porosity and nutrient availability. The study was arranged according to a factorial Completely Randomized Design (CRD), repeated three times. The first factor was seven kinds of organic matter (control, cow dung + banana peel compost, cow dung + leaf litter compost + compost water hyacinth + cow dung, humin, humic acid, and biochar. The application doses are respectively for each treatment: humic acid and humin 20 kg ha-1, biochar 1 Mg ha-1, compost+manure fertilizer 15 Mg ha-1. Changes in soil chemical characteristics were evaluated against pH, C-org, and Available-P, while changes in soil physical characteristics were evaluated against bulk density, particle density, and soil porosity. The results showed that the combination of organic matter and percent sand could improve the physical and chemical characteristics of the soil. Bulk density (BD), particle density (PD), and soil porosity increased with the addition of sand. The organic matter significantly correlated with improving soil properties was humic acid, humin, biochar, compost, and manure, with the best percentage of sand at 20%.
Impact of Super Absorbent Polymer and Polyacrylamide on Water Holding Capacity on Ultisol, Lampung Ramadhani, Winih sekaringtyas; Cahyono, Priyo; Syaifudin, Akhmad; Afandi, Afandi
JOURNAL OF TROPICAL SOILS Vol. 29 No. 1: January 2024
Publisher : UNIVERSITY OF LAMPUNG

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.5400/jts.2024.v29i1.33-40

Abstract

Methods of soil and water conservation in tropical wetlands have been carried out is using chemicals to increase the stability of soil aggregates and water-holding capacity. The experiment aims to improve soil stability using Polyacrylamide (PAM) and Super Absorbent Polymer (SAP) materials. Experiment was carried out in R&D Dept. PT. Great Giant Pineapple (PT. GGP), Lampung. The treatment was to mix ingredients into the water with variations the ratio of ingredients (g): water (ml), among others, 1:100, 1:200, 1:300, and 1:400. Next, the SAP/PAM material is mixed into 100 g of soil with a dose of 0 g, 4 g, 8.5 g and 10 g of SAP. After the soil was mixed with the SAP, take as much as 15 g and place it in a pot containing 1 kg of soil. Results experiment show the SAP is a polymer capable of increasing water availability in ultisols and sand used in the experiment and can increase the water content by 18% if compared control. Meanwhile, PAM is a more dominant polymer in its function as an aggregate adhesive instead of a water binder. Super Absorbent Polymer (SAP) and Polyacrylamide (PAM) can chemically function as chemicals for soil conservation.
Characteristics of Peat with Different Depths in Supporting Growth and Productivity of Oil Palm Santi, Ida Nur; Hayata, Hayata; Bangun, Bangun
JOURNAL OF TROPICAL SOILS Vol. 28 No. 1: January 2023
Publisher : UNIVERSITY OF LAMPUNG

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.5400/jts.2023.v28i1.17-22

Abstract

The potential for oil palm production on peatlands is very diverse; different types of peat, maturity, and depth significantly influence yields. This study aims to determine the characteristics of peat with different depths in supporting the growth and productivity of oil palm. The research was conducted at the PT Kaswari Unggul Palm Oil Plantation in Jambi Province using laboratory surveys and test methods. Observations done were Plant height, Number of Fresh Fruit Bunches (FFB), Stem Circumference, FFB Weight, Midrib Length, Palm Oil Productivity, Light Intensity. Soil analysis were available-P, total-Fe-, total N, organic-C and CEC, pH, Al-exchange, total-K, Soil Moisture, and Peat Maturity. In shallow peat, the soil is more completely decomposed and provides nutrients that can be absorbed by plants so that plants grow better. The results showed that the shallow peat has a maturity level of sapric peat (very ripe) and peat in hemic maturity (slightly mature). Also, the depth of peat will affect the value of total-N, pH, available-P, and K-exchange and does not affect organic-C, total-Fe, CEC, and Al-exchange. Moreover, the growth and production of oil palm on shallow peat were better than on deep peat.
Role of Rice Husk Biochar in Improving Soil Physical Properties of ex Gold-Mined Soil Yulnafatmawita, Yulnafatmawita; Yasin, Syafrimen; Maira, Lusi
JOURNAL OF TROPICAL SOILS Vol. 28 No. 3: September 2023
Publisher : UNIVERSITY OF LAMPUNG

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.5400/jts.2023.v28i3.127-133

Abstract

Mining causes destructive soil properties, especially soil texture, water retention, and transmission. Applying biochar is the best way to improve soil physical properties. A glasshouse experiment was conducted to evaluate the role of biochar on soil physical properties based on a Completely Randomized Design (CRD) with four replicates. The research comprised six treatments (0, 4, 8, 12, 16, 20 t biochar ha-1). The results showed that the ex-gold-mined soil had coarse soil texture (sandy loam), high Bulk Density (BD) (1.43 g cm-3), low Total Soil Pores (TSP) (46.45%), low soil organic matter (SOM) content (1.27 %), very fast hydraulic conductivity (198.8 cm h-1). After biochar incubation, SOM increased (to 3.11%), soil BD decreased (to 1.16 g cm-3), TSP increased (to 54.17 %), water retention increased (at pF 1.0, 2.0, 2.54, and 4.2), plant available water (PAW) increased (into 8.33 %), and hydraulic conductivity decreased (into 24.70 cm h-1). However, applying 20 t biochar ha-1 still needs to bring the soil physical properties of the ex-gold-mined soil back into suitable soil for farming land.
Rice Quality and Yield at Various Application Times of Organic Rice Management System Syamsiyah, Jauhari; Ariyanto, Dwi Priyo; Herawati, Aktavia; Komariah, Komariah; Hartati, Sri; Nurbaiti, Fitri
JOURNAL OF TROPICAL SOILS Vol. 28 No. 1: January 2023
Publisher : UNIVERSITY OF LAMPUNG

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.5400/jts.2023.v28i1.9-15

Abstract

The higher national rice demand encourages various efforts to increase rice production. This increase in rice production occurs in line with increasing public awareness of healthy foods, especially organic rice. Rice field management with an organic system is expected to provide a higher yield and quality of rice. This study aims to determine the effect of the long-time application of an organic rice management system on rice yield and quality. Descriptive exploratory research is supported by laboratory analysis of samples of organic rice plants with three periods (10 years, 7 years, and 4 years), semi-organic and conventional. The parameters observed were dry harvested grain, dry milled grain, the weight of 1000 grains, unfilled grain, protein content, amylum, amylopectin, and reducing sugar. The most prolonged organic rice field management with the application of 10 years gives better results with a protein content of 6.14%, amylum 71.71%, and amylopectin 49.35%. While the application of organic farming for 7 years gives the highest rice yield, the difference is not confirmed with the application of organic 10 years, with the weight of dry grain harvest 10.44 Mg ha-1, dry milled grain 8.15 10.44 Mg ha-1, the weight of 1000 grains 24 g, and unfilled grain 3.8%.
Changing 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 (in Progress)
Publisher : UNIVERSITY OF LAMPUNG

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

Abstract

Uncontrolled land conversion causes reduced land area for plant cultivation. The alternative used for rice cultivation is the marginal land such as sandy soil, however, several constraints led to very low productivity, so it needs proper management such as the addition of organic matter. The purpose of this study was to determine the 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, with a factorial Completely Randomized Design (CRD) method, with 2 factors. Factor I was Azolla microphylla (A) (A0= 0, A1= 50, A2= 100, A3= 150 tons ha-1). Factor II was quail manure (Q) (Q0= 0, Q1= 20, Q2= 40 tons ha-1). Azolla microphylla and quail manure were incubated for 14 days under anaerobic conditions. The results showed that the application Azolla microphylla and quail manure increased chemical properties on sandy soil significantly. The addition of Azolla microphylla (100 tons ha-1) and quail manure (40 tons ha-1) increased the chemical properties of sandy soil such as cation exchange capacity (CEC), available-P, ammonium, available-K, available-Ca, electrical conductivity (EC) and redox potential (Eh).
Effect of Coffee Ages and Shade Types on Soil Moisture and Soil N, P, K Availability in UB Forest sa'diyah, zenny faridatus; Prijono, Sugeng; Suntari, Retno; Kusuma, Zaenal
JOURNAL OF TROPICAL SOILS Vol. 28 No. 2: May 2023
Publisher : UNIVERSITY OF LAMPUNG

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.5400/jts.2023.v28i2.39-45

Abstract

Water and nutrients is important for plant which has its characteristics. This study has been carried out in the UB (Brawijaya University) forest about soil moisture content during rainy and dry seasons, Total-N, -P, -K from litter on different types of shade and age of coffee plants, and their effect on soil Available-N, -P, and -K. There are P1 (control), P2 (4-year-coffee + pine), P3 (7-year-coffee + pine), P4 (4-year-coffee + mahogany), and P5 (7-year-coffee + mahogany). These treatments affected to total soil moisture storage, Total-N, -P, -K of litter, and Available-N, -P, -K in the soil. The soil moisture storage change between rainy and dry seasons was 36.97 mm. The highest Total-N, -P, and -K of litter was 11.00 kg ha-1 y-1 at P3, 1.06 kg ha-1 y-1 at P2, and 4.35 kg ha-1 y-1 at P3, which was inconsistently associated with high soil nutrients. The highest Total-N was 0.40 (0-20 cm), 0.27 (20-40 cm), 0.30% (40-60 cm) at P4, Available-K was 1.69 (0-20 cm), 1.64 (20-40 cm), 1.87 cmol kg-1 (40-60 cm) at P5, and Available-P was 15.21 (0-20 cm), 14.06 (20-40 cm), 12.64 mg kg-1 (40-60 cm) at P1.
Changes in Soil Physical Properties Following Applications of Vermicompost Superimposed with Liquid Organic Fertilizer Hermawan, Bandi; Muktamar, Zainal; Fahrurrozi, Fahrurrozi; Setyowati, Nanik; Sujatmiko, Sigit; Chosin, Muhammad; Putri, Elsa Lolita
JOURNAL OF TROPICAL SOILS Vol. 29 No. 2: May 2024
Publisher : UNIVERSITY OF LAMPUNG

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.5400/jts.2024.v29i2.107-113

Abstract

Soil properties play essential roles in transmitting and holding precipitation water; therefore, they determine the amount of plant-available water in the soil profile. The study aimed to compare the size distributions of Andept soil pores following four-year applications of vermicompost and liquid organic fertilizer (LOF). The experiment was done from 2016 to 2019. The five doses of vermicompost (5, 10, 15, 20, and 25 Mg ha-1) set as the main factor, supplemented with 0 and 100 percent concentrations of LOF as a sub-factor, were arranged in a split-plot design with three replicates. Results showed that adding LOF decreased slow-drainage pores significantly when combined with 10 Mg ha-1 of vermicompost. However, the pore changes by LOF were not significant when applied to other doses of vermicompost. Applying vermicompost and LOF lowered the slow-drainage pores by increasing soil organic carbon and reducing soil particle density. The findings suggest that vermicompost and LOF act as soil ameliorants to reduce water loss by drainage from soil profiles. The study highlights the importance of soil properties in determining plant-available water in the soil profile.

Page 77 of 82 | Total Record : 812

 75   76   77   78   79 

Filter by Year

2008 2025


Reset
Filter By Issues
All Issue Vol 30, No 3: September 2025 (in Progress) Vol. 30 No. 3: September 2025 (in Progress) Vol 30, No 2: May 2025 Vol. 30 No. 2: May 2025 Vol. 30 No. 1: January 2025 Vol 30, No 1: January 2025 Vol. 29 No. 3: September 2024 Vol 29, No 3: September 2024 Vol. 29 No. 2: May 2024 Vol 29, No 2: May 2024 Vol 29, No 1: January 2024 Vol. 29 No. 1: January 2024 Vol 28, No 3: September 2023 Vol. 28 No. 3: September 2023 Vol. 28 No. 2: May 2023 Vol 28, No 2: May 2023 Vol. 28 No. 1: January 2023 Vol 28, No 1: January 2023 Vol 27, No 3: September 2022 Vol. 27 No. 3: September 2022 Vol 27, No 2: May 2022 Vol. 27 No. 2: May 2022 Vol 27, No 1: January 2022 Vol. 27 No. 1: January 2022 Vol. 26 No. 3: September 2021 Vol 26, No 3: September 2021 Vol 26, No 2: May 2021 Vol. 26 No. 2: May 2021 Vol. 26 No. 1: January 2021 Vol 26, No 1: January 2021 Vol. 25 No. 3: September 2020 Vol 25, No 3: September 2020 Vol. 25 No. 2: May 2020 Vol 25, No 2: May 2020 Vol. 25 No. 1: January 2020 Vol 25, No 1: January 2020 Vol 24, No 3: September 2019 Vol. 24 No. 3: September 2019 Vol 24, No 2: May 2019 Vol. 24 No. 2: May 2019 Vol. 24 No. 1: January 2019 Vol 24, No 1: January 2019 Vol. 23 No. 3: September 2018 Vol 23, No 3: September 2018 Vol. 23 No. 2: May 2018 Vol 23, No 2: May 2018 Vol. 23 No. 1: January 2018 Vol 23, No 1: January 2018 Vol 22, No 3: September 2017 Vol. 22 No. 3: September 2017 Vol. 22 No. 2: May 2017 Vol 22, No 2: May 2017 Vol 22, No 1: January 2017 Vol. 22 No. 1: January 2017 Vol 21, No 3: September 2016 Vol. 21 No. 3: September 2016 Vol. 21 No. 2: May 2016 Vol 21, No 2: May 2016 Vol 21, No 1: January 2016 Vol. 21 No. 1: January 2016 Vol. 20 No. 3: September 2015 Vol 20, No 3: September 2015 Vol. 20 No. 2: May 2015 Vol 20, No 2: May 2015 Vol. 20 No. 1: January 2015 Vol 20, No 1: January 2015 Vol. 19 No. 3: September 2014 Vol 19, No 3: September 2014 Vol 19, No 2: May 2014 Vol. 19 No. 2: May 2014 Vol 19, No 1: January 2014 Vol. 19 No. 1: January 2014 Vol. 18 No. 3: September 2013 Vol 18, No 3: September 2013 Vol 18, No 2: May 2013 Vol. 18 No. 2: May 2013 Vol 18, No 1: January 2013 Vol. 18 No. 1: January 2013 Vol. 17 No. 3: September 2012 Vol 17, No 3: September 2012 Vol 17, No 2: May 2012 Vol. 17 No. 2: May 2012 Vol. 17 No. 1: Januari 2012 Vol 17, No 1: Januari 2012 Vol 16, No 3: September 2011 Vol. 16 No. 3: September 2011 Vol. 16 No. 2: May 2011 Vol 16, No 2: May 2011 Vol 16, No 1: January 2011 Vol. 16 No. 1: January 2011 Vol. 15 No. 3: September 2010 Vol 15, No 3: September 2010 Vol. 15 No. 2: May 2010 Vol 15, No 2: May 2010 Vol. 15 No. 1: January 2010 Vol 15, No 1: January 2010 Vol 14, No 3: September 2009 Vol. 14 No. 3: September 2009 Vol. 14 No. 2: May 2009 Vol 14, No 2: May 2009 Vol 14, No 1: January 2009 Vol. 14 No. 1: January 2009 Vol 13, No 3: September 2008 Vol. 13 No. 3: September 2008 Vol 13, No 2: May 2008 Vol. 13 No. 2: May 2008 Vol 13, No 1: January 2008 Vol. 13 No. 1: January 2008 More Issue