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 817 Documents
 64   65   66   67   68 
Abundance of Soil Arthropods under Reduced Tillage and Bagasse Mulching in a Sugarcane Plantation in Central Lampung, Indonesia Susilo, Fransiscus Xaverius; Swibawa, I Gede; Kaneko, Nobuhiro; Kristina, Anastasia; Sholih, Muhammad Badrus; Saputra, Muhamad Jaya; Firdaus, Fazri; Haryani, Sri; Gunito, Heru; Saefudin, Saefudin
JOURNAL OF TROPICAL SOILS Vol. 23 No. 2: May 2018
Publisher : UNIVERSITY OF LAMPUNG

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.5400/jts.2018.v23i2.99-109

Abstract

This study was aimed to show whether conservation effort through reduced tillage or mulching can promote soil zoological benefits, especially to the soil arthropods in sugarcane plantations area, Central Lampung, Indonesia. Twenty sugarcane plots of 25 m × 25 m size each were prepared in the area and treated with two combined treatments i.e. tillage (no tillage and full tillage) and mulching (without bagasse and with bagasse mulch). Tillage and planting were done in July 2010 while mulching was conducted in August 2010. The arthropods were sampled using pitfall traps (mouth diameter = 13.5 cm), each was set per plot for 24 hours. Specimens were identified at least to order level. Sampling was done in September 2010 (1 month after mulch treatment, MAT), January 2011 (4 MAT), and July 2011 (10 MAT). We found four major arthropod orders, namely Araneae (spiders, predator), Coleoptera (beetles, mostly non predator), Collembola (springtails, fungal feeder), and Hymenoptera (ants, mostly forager). The last two groups were the most dominant (contributing to > 90 % of the total abundance). Tillage affected the abundance of overall soil arthropods at 1 MAT and 4 MAT but the effect disappeared at 10 MAT. Reduced tillage can conserve, or does not harm, some soil arthropod groups (ants, predatory ants, beetles, springtails, spiders) in sugarcane agroecosystem.
Residual Effect of Nitrogen Fertilization on Nitrous Oxide Flux and Yield of Three Cowpea Varieties (Vigna unguiculata L.) in Rainfed Rice Fields Wihardjaka, Anicetus
JOURNAL OF TROPICAL SOILS Vol. 23 No. 2: May 2018
Publisher : UNIVERSITY OF LAMPUNG

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.5400/jts.2018.v23i2.91-98

Abstract

Nitrogen fertilizer use in rainfed rice fields is generally less efficient, only part of N is taken up by plants for their gowth and other N is lost and fixed by soil particles. Nitrogen loss in the form of nitrous oxide can reduce N fertilizer use efficiency and contribute to the increase of atmospheric greenhouse gases emission. The field experiment was conducted to determine the residual effect of N fertilizer on nitrous oxide (N2O) flux and yield of some cowpea varieties (Vigna unguiculata) in rainfed rice fields. The experiment was arranged in a factorial randomized block design with three replicates. The first factor was three cowpea varieties (KT 9, KT 6, KT 3), while the second factor was four levels of residual inorganic N fertilizer (0, 90, 135, 180 kg N ha-1). The variables measured were N2O fluxes, grain yield, biomass weight, total N content in soil before planting cowpea, available N in soil after harvesting cowpea. Residual N fertilizer increased significantly N2O emission from cowpea cropping. Nitrous oxide emission from plots grown with cowpea variety of KT 9, KT 6, and KT 3 ranged 0.42-0.69, 0.30-2.64, and 0.09-2.19 kg N2O ha-1, respectively. N losses from soil grown with KT 9 was lower than those in plots grown with other varieties. Residual effect of N fertilizer increased available N in soil as much as 11.6-82.3% (KT 9), 7.6-30.6 % (KT 6), and 9.6-67.9% (KT 3), recpectively. Residual effect of N fertilizer increased significantly grain yield of KT 9, KT 6, and KT 3 varieties as much as 45.7-111.8%, 79.8-89.3%, and 6.9-25.4%, respectively.
Dynamics of Soil Moisture under Different Water Levels and Various Dosages of Organic Fertilizer Nur, Subandi; Suwarto, Suwarto; Saparso, Saparso; Djatmiko, Heru Adi
JOURNAL OF TROPICAL SOILS Vol. 25 No. 3: September 2020
Publisher : UNIVERSITY OF LAMPUNG

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.5400/jts.2020.v25i3.157-164

Abstract

The study aimed to determine the dynamics of soil moisture in various standing water levels and dosages of organic fertilizer. The experiment was arranged in a Completely Randomized Block Design (CRBD) with a 3 × 3 factorial treatment in 3 replicates. The first factor was 3 different water levels, namely 10 cm (T1), 20 cm (T2), and 30 cm (T3). The second factor was 3 levels of dosages of organic fertilizer, namely 0 g pot-1(P1), 35 g pot-1 (P2), and 70 g pot-1 (P3). The highest of soil moisture was obtained in the 10 cm water levels and 70 g organic fertilizer (T1P3) and the lowest in the 30 cm water levels and without organic fertilizer (T3P1). The highest infiltration rate was obtained in the 30 cm water levels and 70 g pot-1 organic fertilizer (T3P3), the 30 cm water levels and 35 g pot-1 organic fertilizer (T3P2), the 20 cm water levels and 70 g pot-1 organic fertilizer (T2P3), and the lowest in the combination of the 10 cm water levels and without organic fertilizer (T1P1). The highest capillary rate was obtained in the combination of the 30 cm water levels and 70 g organic fertilizer (T3P3) and the lowest in the combination of the 30 cm water levels and without organic fertilizer (T3P1).
The Effect of Organic and Inorganic Fertilizer Applications on N, P and K Uptake and Yield of Sweet Corn (Zea mays saccharata Sturt) Sofyan, Emma Trinurani; Sara, Dirga Sapta
JOURNAL OF TROPICAL SOILS Vol. 23 No. 3: September 2018
Publisher : UNIVERSITY OF LAMPUNG

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.5400/jts.2018.v23i3.111-116

Abstract

To overcome insufficient sweet corn production in Indonesia, various strategies have been developed to improve its production. This study was conducted to evaluate the effect of organic fertilizer (i.e. cow manure) and inorganic fertilizer application on nutrient uptake and yield of sweet corn (Zea mays saccharata Sturt). Inceptisol possess low soil fertility and relatively low to moderate level of organic matter content. Application of organic fertilizer in combination with inorganic fertilizers is expected to increase N, P and K uptake and yield of sweet corn. This study was conducted from October 2016 to February 2017 at the Field Experimental Station of Agriculture Faculty, Universitas Padjadjaran in Jatinangor, West Java. The study was performed in a Randomized Block Design consisting of 10 treatments and 3 replications. The treatments were as follow: A = Control, B = Standard NPK, C = 0 NPK + 1 organic fertilizer, D = ¼ NPK + 1 organic fertilizer, E = ½ NPK + 1 organic fertilizer,  F = ¾ NPK + 1 organic fertilizer, G = 1 NPK + 1 organic fertilizer, H = ¾ NPK + ¼ organic fertilizer, I = ¾ NPK + ½ organic fertilizer and J = ¾ NPK + ¾ organic fertilizer. The results showed that the treatment I (¾ NPK + ½ organic fertilizer) resulted in the highest N, P and K uptake, i.e. 54.31 mg plant-1; 82.85 mg plant-1 and 56.40 mg plant-1, respectively and the heaviest weight of sweet corn, i.e. 407.33 g.
The Growth of Oil Palm (Elaeis guineensis Jacq.) Seedlings with the Application of Different Arbuscular Mycorrhiza Fungi and Various Phosphorous Dosages Krisnarini, Krisnarini; Rini, Maria Viva; Timotiwu, Paul Benyamin
JOURNAL OF TROPICAL SOILS Vol. 23 No. 3: September 2018
Publisher : UNIVERSITY OF LAMPUNG

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.5400/jts.2018.v23i3.117-124

Abstract

The effectiveness of Arbuscular Mycorrhiza Fungi (AMF) colonization depends on the type of AMF, plant species and phosphorus fertilization.  The aims of this study were to determine: the best type of AMF and the appropriate dosage of P fertilizer for the growth of oil palm seedlings, and whether the oil palm seedling responses to the application of AMF type is determined by the dosage of phosphorus applied. The experiment was arranged in a Randomized Complete Block Design (RCBD) with two factors and 5 replications. The first factor was the types of AMF (m), consisting of without mycorrhiza inoculation (m0), Gigaspora sp. MV16 isolate (m1), Glomus sp. MV7 isolate (m2), Gigaspora sp. MV16 isolate + Glomus sp. MV7 (m3) isolate.  The second factor was phosphorus fertilization (SP-36), consisting of 3 levels: 1/3 recommended dosage (p1), 2/3 recommended dosage (p2), full recommended dosage (p3). The results showed that the application of all AMF types resulted in the same effects on the growth of oil palm seedlings, however the seedling growth in the inoculated plants were better than in uninoculated plants (control). The application of the recommended dosage of P fertilizer produced the highest seedling growth. The response of seedlings to the application of AMF type was not determined by doses of phosphorus fertilizer applied.
The Potential of Swampland Microalgae as Nitrogen Provider Lestari, Primastya Ayu; Gofar, Nuni; Budianta, Dedik
JOURNAL OF TROPICAL SOILS Vol. 23 No. 3: September 2018
Publisher : UNIVERSITY OF LAMPUNG

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.5400/jts.2018.v23i3.125-131

Abstract

This study aimed to identify and explore the potential of microalgae from swampland of South Sumatra as nitrogen contributor for rice plants grown on swampland. Determination of sampling points was done by looking at the presence and abundance of microalgae in the sampling locations.  The method used in the sampling is purposive sampling method. The samples were grouped into 3, i.e. culture 1 (B1) derived from rice cultivation area, culture 2 (B2) derived from land that was not cultivated with rice, and culture 3 (B3) derived from swamp water samples. The medium used to culture the microlagae was Johnson's medium. The variables measured were the number of microalgae cells and ammonium concentrations on day 1, 4, 8 and 16 of culturing. Three species of Cyanophyceae class from the swampland were identified, i.e. thread algae, Synedra sp. and Melosira sp. Those microalgae may contribute the maximum amount of available nitrogen of 21.41 ìg mL-1 in the form of ammonium to the rice plants on days 10-12. Microalgae in culture 1 can contribute nitrogen for rice plants in the form of ammonium about 16.23% - 48.71% with the cell density of 7.48 cells mL-1.
Soil Enzyme Activities and Their Relationship to Total Soil Bacteria, Soil Microbial Biomass and Soil Chemical Characteristics of Organic and Conventional Farming Aziz, Muhammad Abdul; Hazra, Fahrizal; Salma, Selly; Nursyamsi, Dedi
JOURNAL OF TROPICAL SOILS Vol. 23 No. 3: September 2018
Publisher : UNIVERSITY OF LAMPUNG

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.5400/jts.2018.v23i3.133-141

Abstract

Soil properties such as physical, chemical, biological, microbiological and biochemical aspects affect on soil quality. Soil microbiological activities directly affect stability of ecosystems and soil fertility. The research aimed to determine soil microbial activities through soil enzyme activities and their relationship to total soil bacteria, soil microbial biomass, and soil chemical characteristics. The research was conducted at Laboratory of Soil Microbiology, Indonesian Soil Research Institute, Bogor from July 2015 to January 2016. Soil samples 0-10 cm depth were taken from organic and conventional farming of some commodities (tomato, carrot, maize, broccoli) from Bogor Regency, while those of rice were taken from Tasikmalaya Regency. Soil dehydrogenase, urease and cellulase activities were determined using some modified methods. The results showed that soil dehydrogenase and cellulase activities in organic farming were higher than those in conventional farming, whereas the soil urease activity in organic farming was lower than that in conventional farming. The total soil bacteria and soil microbial biomass were significantly and positively correlated with soil dehydrogenase, urease, and cellulose activities. Soil dehydrogenase, urease, and cellulose activities were very significantly and positively correlated with all soil characteristics tested, i.e. soil organic C, total N, potential P and K, available P and K, CEC, and pH, except that soil urease activity was very significantly and negatively correlated with soil pH. The results of this research indicated that organic farming is recommended for maintaining soil fertility and plant productivity; however, small use of urea fertilizer is still needed in the farming.
Physical Properties of Briquette Fertilizers Made from Urea and Fly Ash-Azolla Hermawan, Agus; Napoleon, Adipati; Bakri, Bakri
JOURNAL OF TROPICAL SOILS Vol. 23 No. 3: September 2018
Publisher : UNIVERSITY OF LAMPUNG

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.5400/jts.2018.v23i3.143-150

Abstract

Coal fly ash and Azolla biomass are potential materials to be used as raw materials for the manufacture of briquette fertilizers. In this study, the coal fly ash, azolla and urea in various compositions were mixtured to make briquette fertilizers. The study was conducted to evaluate the physical properties of briquette fertilizers, i.e bulk density, compressive strength, porosity, and water holding capacity on various compositions of fly ash-azolla and urea. The research was arranged in a Completely Randomized Design with three replicates. The formulation of briquette fertilizers as treatments was made with the compossition (w/w, dry-weight basis) of (fly ash : azolla) + urea as follows: (40:60)90+10; (40:60)80+20; (40:60)70+30; (50:50)90+10; (50:50)80+20; (50:50)70+30; (60:40)90+10; (60:40)80+20 and (60:40)70+30. The results showed that the variation in composition of coal fly ash-azolla and urea significantly affected the compressive strength, bulk density, water holding capacity and porosity of briquette fertilizers produced. The increase in the proportion of fly ash or the decrease of azolla biomass proportion tends to increase compressive strength and bulk density, and tends to decrease the water holding capacity and porosity of briquette fertilizers produced.
Erosion and Surface Runoff on Forest and Oil Palm Plantation in Jalemu Watershed, Gunung Mas Regency, Central Kalimantan Province Jaya, Adi; Birawa, Cakra; Adji, Fengky Florante; Anwar, Mochamad; Banuwa, Irwan Sukri
JOURNAL OF TROPICAL SOILS Vol. 23 No. 3: September 2018
Publisher : UNIVERSITY OF LAMPUNG

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.5400/jts.2018.v23i3.151-159

Abstract

Changes of land cover from forest to non-forest areas affect the hydrological cycle and water quality in watershed ecosystems, such as the change of forest into oil palm plantation areas. Increased production and extention of oil palm plantations have impacts on the environment and water quality, which have become one of the environmental issues. The study was conducted to provide an overview of the erosion and surface runoff from forest and oil palm plantations and their impacts on the water quality. Erosion plots with the size of 15 m × 25 m were made on Jalemu Watershed, Gunung Mas Regency, Central Kalimantan Province. The research was conducted to study the impact of land cover changes on erosion and surface runoff and nutrient loss into the Jalemu River Basin. Sampling of sediments and runoff water was carried out from the erosion plots, inlcuding water sampling from Jalemu watershed. The results showed that the erosion and surface runoff that occurred in the 5 years old oil palm area were higher than in the forest area, which implied the loss of nutrients from oil palm plantation areas and the potential for water pollution by the nutrients.
Pengaruh Kombinasi Senyawa Humik dan CaCO3 terhadap Alumunium dan Fosfat Typic Paleudult Kentrong Banten Winarso, Sugeng; Handayanto, Eko; Syekhfani, Syekhfani; Sulistyanto, Didik
JOURNAL OF TROPICAL SOILS Vol. 14 No. 2: May 2009
Publisher : UNIVERSITY OF LAMPUNG

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.5400/jts.2009.v14i2.89-95

Abstract

Effect of Humic Compounds and CaCO3 Combination on Aluminium and Phosphate of Typic Paleudult Kentrong Banten (S. Winarso, E. Handayanto, Syekhfani and D. Sulistyanto): Decomposition of organic matter releases humic compounds, that can chelate metals include Al in acidic soils. This chelation of Al is important for decreasing of Al activity and P fixation in acidic soils. This study was aimed to test the effect of humic compounds extracted from rice-straw compost and CaCO3 combination on aluminium activity and phosphate (available P) on an Ultisol (Typic Paleudult) collected from Kentrong Banten.  A laboratory study was conducted by series consentration of CaCO3 (0, 500, 1.000, 2.000, dan 3.000 ppm) in 8 grams of acidic soil. The acidic soil had previously been subjected to continuously addition of humic compounds and none. Then, these mix of soil and CaCO3 were added 40 ml contained 5.000 ppm humic compounds to obtain 1:5 soil:suspension ratio and  control was made by using aquadest. They were shaked for 2 hours every day and pH was measured. At 11st days incubation  Alexch (N KCl) and soluble of P (PB and PC) were measured.  The results  showed that liming or addition of CaCO3 to the acidic soils decreased Alexch (precipitated to be Al(OH)3) linearly with formula y = -0.778x + 6.108; y = Alexch (Cmol kg-1), x = CaCO3 (M); R² = 0,916. Combination addition of humic compounds and CaCO3 was able to increase pH and Alexch up to not detected. The increased of P-soluble or desorption P untill 384% took place at addition of 0.0016 M CaCO3 and 5000 ppm humic compounds. More desorption of P was observed if the acidic soils has previously been subjected to continuously addition of humic compounds, such us the increased of soluble P up to 739% at addition of CaCO3 0.0008 M.

Page 66 of 82 | Total Record : 817

 64   65   66   67   68 

Filter by Year

2008 2026


Reset
Filter By Issues
All Issue Vol. 31 No. 1: January 2026 (In Progress) Vol 30, No 3: September 2025 (in Progress) Vol. 30 No. 3: September 2025 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