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
 43   44   45   46   47 
Effect of Bio-phosphate on Increasing the Phosphorus Availability, the Growth and the Yield of Lowland Rice in Ultisol Yafizham, Yafizham; Abubakar, Muslim
JOURNAL OF TROPICAL SOILS Vol. 15 No. 2: May 2010
Publisher : UNIVERSITY OF LAMPUNG

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.5400/jts.2010.v15i2.133-138

Abstract

Effects of Bio-phosphate on Increasing the Phosphorus Availability, the Growth and the Yield of Lowland Rice in Ultisol (Yafizham and M Abubakar): Ultisol soil is low of macro and micro nutrient, pH and base saturation as well as high toxicity of Al and Fe. To increase productivity of ultisols soils, especially availability of P nutrients, the use  of bio-phosphate can increase P solubilizing in the soils. The research was conducted in the green house of Agriculture Faculty, the University of Lampung from January to March 2005.  A factorial experiment using two factors  in a randomized completely block design with five replications was conducted.  The first factor was dosages of bio-phosphate (0; 10; 20 g L-1), the second factor was lowland rice cultivar (Ciherang, Sintanur, Cilosari and IR64).  The results showed that the availability of N, K and P nutrients in the soil before planting was low. Application of bio-phosphate increased availability of N, K and P in the soil. Application of 10 g L-1 and 20 g L-1 of bio-phosphate increased root length of lowland rice, there were 13.3% and 36.8%, respectively. Application of 20 g L-1 of bio-phosphate increased 100 grain weight of lowland rice which were higher 11.4% compared to without any bio-phosphate.
Effects of Green Manure and Clay on the Soil Characteristics, Growth and Yield of Peanut at the Coastal Sandy Soil Muchtar, Muchtar; Soelaeman, Yoyo
JOURNAL OF TROPICAL SOILS Vol. 15 No. 2: May 2010
Publisher : UNIVERSITY OF LAMPUNG

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.5400/jts.2010.v15i2.139-146

Abstract

Effects of Green Manure and Clay on the Soil Characteristics, Growth and Yield of Peanut at the Coastal Sandy Soil (Muchtar and Y Soelaeman): Poor physical properties and limited amount of available nutrients were regarded as two main constraints possessed by coastal sandy soil for agricultural production.  The objective of the study was to identify the effect of green manure and clay soil applications toward soils characteristic, growth and yield of peanut (Arachis hypogeae L.) in  the coastal sand soil.  A  completely randomized design with factorial pattern 4 x 5 was applied in this experiment.  The first factors were the rate of green manure application consisted of four levels, i.e. control, 5 Mg ha-1, 10 Mg ha-1 and 15 Mg ha-1 of green manures. The second factors were the addition of five different levels of clay, i.e. control, Vertisol, Alfisol, Inceptisol and Vertisol + Alfisol + Inceptisol.  Each treatment combinations were replicated three times.  Results of the study showed that the vertisol soil affecting physical characteristics of soil.  The addition of Inceptisol soil affected chemical characteristic of soil, increased growth and yield of peanut.  Application of 15 Mg ha-1 of green manures affected toward the characteristic of soils except of the crop yields.  However, there was no significant interaction effect from both materials to all variables observed.
Soil Erosion Prediction Using GIS and RUSLE: Study at Sampean Watershed Faisol, Arif; Indarto, Indarto
JOURNAL OF TROPICAL SOILS Vol. 15 No. 2: May 2010
Publisher : UNIVERSITY OF LAMPUNG

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.5400/jts.2010.v15i2.147-152

Abstract

Soil Erosion Prediction Using GIS and RUSLE: Study at Sampean Watershed (A Faisol and Indarto): Erosion is one  factor that cause soil degradation in Indonesia. RUSLE (Revised Universal Soil Loss Equation) is widely used to predict average annual rate of soil erosion. This research integrate the Revised Universal Soil Loss Equation (RUSLE) and Geographic Information System (GIS) to predict potential soil erosion losses. Study was conducted at Sampean Watershed where located in Eastern part of East Java. Firstly, GIS layer was obtained from available database that cover East Java Province. All treatment of GIS layer was done using Mapwindows GIS. Furthermore, RUSLE method was used to predict rate of soil erosion from GIS layer treated previously.  Results showed that up to 82% (102,921 ha) area of the watershed have tolerable soil erosion rate.
Spatial Variability of Soil Nutrients Content Related to Rice Yield Syam, Tamaluddin
JOURNAL OF TROPICAL SOILS Vol. 15 No. 2: May 2010
Publisher : UNIVERSITY OF LAMPUNG

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.5400/jts.2010.v15i2.153-157

Abstract

Spatial Variability of Soil Nutrients Content Related to Rice Yield (T Syam): Soil nutrients content and its spatial distribution are very important data for site specific fertilizer management to supply sufficient crop nutrition.  The study was carried out  at the farmer paddy field in Rejomulyo Village, Metro Town District of Lampung Province. The aim of this study was to evaluate the relationship between soil nutrients content (N, P, K) and rice yield. Soil samples were collected before fertilizers treatment by the grid sampling method and GPS was used as a tool for precisely determine sample site location.  Rice yield data were collected by small plot method on the each-of soil sample location. Spatial analysis using GS + software and statistical analysis using SPSS software. The result indicated that total nitrogen in the soil had a significantly correlation with the rice yield   (r = 0.95**) and their spatial distribution was relatively similar each others.  Spatial maps of soil nutrients content could be used for the variable rate fertilizers treatment, especially for nitrogen.
Land Suitability Criteria for Intensively Managed Cavendish Banana Crop in Way Kambas East Lampung, Indonesia Ansyori, .; Sudarsono, .; Poerwanto, Roedhy; Darmawan, .
JOURNAL OF TROPICAL SOILS Vol. 15 No. 2: May 2010
Publisher : UNIVERSITY OF LAMPUNG

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.5400/jts.2010.v15i2.159-167

Abstract

Land Suitability Criteria for Intensively Managed  Cavendish Banana Crop in Way Kambas East Lampung, Indonesia (Ansyori, Sudarsono, R Poerwanto, and Darmawan): Banana as one of the pre-eminent products of horticultural crop has a very important role in the growth of agricultural sector.  The research aimed to study the land characteristics which influence the Cavendish banana crop yield and proposing the land suitability classification criteria for the land utilization type of Cavendish banana crop with intensive management which has been tested based on the production rate in the field.  For this purpose, there were 36 observation land units specifically designed by considering factors such as soil subgroups, slopes, land utilization types, and land productivity levels.  At each observation land unit, the land utilization types and land characteristics were indentified.  The relation between land characteristics and production was tested with correlation and regression analysis.  The results of some statistical tests were contrasted and then selected as the basis to develop the land suitability classification criteria for Cavendish banana crop which was intensively managed.  The research findings indicated that the banana crop yield levels were significantly influenced and determined by the land characteristics of soil bulk density, cation exchange capacity, soil permeability, total porosity, exchangeable sodium percentage, soil textural class, and soil erodibility.
Land Suitability and Purposed Land Use of Selaru Island, West-Southeast Moluccas Regency Sirappa, Marthen Pasang; Waas, Edwin Donald; Susanto, Andriko Noto
JOURNAL OF TROPICAL SOILS Vol. 15 No. 2: May 2010
Publisher : UNIVERSITY OF LAMPUNG

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.5400/jts.2010.v15i2.169-178

Abstract

Land Suitability and Purposed Land Use of Selaru Island, West-Southeast Moluccas Regency (MP Sirappa, ED Waas and AN Susanto): Research was conducted in Selaru Island, West Southeast Moluccas Regency which has areal 32,217 ha. The purpose of the research was to study land suitability class and directive of land use for developing food crop and estate plant. The results  indicated  that Selaru Island was suitable land (S) for upland rice, corn, peanuts, mungbean, sweet potato, calladium, and coconut which had areal of 28,312 ha, 19,330 ha, 19,330 ha, 19,330 ha, 19,330 ha, 28,312 ha, and 12,886 ha, respectively.  Land which was not suitable creteria (N) for upland rice, corn, peanuts, mungbean, sweet potato, calladium, coconut, and cacao were 3,905 ha, 12,887 ha, 12,887 ha, 12,887 ha, 12,887 ha, 3,905 ha, 19,331 ha, and 32,217 ha, respectively. Llimiting factors of land use for dryland food crop and estate plant in survey location were high temperature, root media (shallow soil solum), retention of nutrient (rather alkaline - until alkaline), medium erosion level and terrain (wavies, rock at soil surface and rock outcrop). Purposed  land use for food crop dyland and estate plant based on land suitability class were (1) public coconut estate with main commodity coconut in the areal of 1,947 ha, (2) food crop dryland-1 with main commodities corn, mungbean, purplish edible tuber, and calladium with a wide was 5,299 ha, (3) food crop dryland-2 with main commodities upland rice, purplish edible tuber, and calladium in the areal of was 8,982 ha, and (4) food crop dryland-3 with main commodities peanuts and mungbean in the areal of 14,031 ha
Selected Physical Properties of Andisols under Different Land Use Condition in Gunung Kerinci Subdistrict, Jambi Endriani, .
JOURNAL OF TROPICAL SOILS Vol. 15 No. 2: May 2010
Publisher : UNIVERSITY OF LAMPUNG

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.5400/jts.2010.v15i2.179-187

Abstract

Selected Physical Properties of Andisols under Different Land Use Condition in Gunung Kerinci Subdistrict, Jambi (Endriani):  Objective of the research was to study the effect of different land use at some land slope condition on some physical properties of Andisols in Gunung Kerinci Subdistrict, Jambi.. The research was conduct using field survey and purposive random sampling methods to collect soil.  The land use which was using in this study were: forest,  cultivation,  cinnamon, and coffee plantation, while land slope level weres: 3-8%,  8-15%, 15-25 %, and > 25%.  The results showed that  among land use types, the rank of soil  physical properties, such as: soil organic matter, bulk density, porosity, percentage of  agregation, stability of agregate, pore distribution and permeability were in order of : forest > cultivation > cinnamon > coffee.  Land conversion from forest to agricultural land caused decreasing in  the soil physical properties.  The higher level of land slope caused the decreasing of soil physical properties  at all type of  land use.
Releasing Pattern of Applied Phosphorus and Distribution Change of Phosphorus fractions in the Acid Upland Soils with Successive Resin Extraction Hartono, Arief
JOURNAL OF TROPICAL SOILS Vol. 13 No. 2: May 2008
Publisher : UNIVERSITY OF LAMPUNG

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.5400/jts.2008.v13i2.87-94

Abstract

The releasing pattern of applied P  in the acid upland soils and the soil properties influencing the pattern were studied.  Surface horizons of six acid upland soils from Sumatra, Java and Kalimantan were used in this study.  The releasing pattern of applied P (300 mg P kg-1) of these soils were studied by successive resin extraction. P fractionation was conducted to evaluate which fractions released P to the soil solution after successive resin extraction.  The cumulative of resin-Pinorganic (Pi) release of soils was fitted to the first order kinetic. Regression analyses using factor scores obtained from the previous principal components analyses was applied to determine soil properties influencing P releasing pattern. The results suggested that the maximum P release was significantly (P < 0.05) increased by acidity plus 1.4 nm mineral-related factor (PC2) i.e. exchangeable Al and 1.4 nm minerals (smectite and vermiculite) and decreased by oxide related factor (PC1) i.e. aluminum (Al) plus 1/2 iron (Fe) (by ammonium oxalate), crystalline Al and Fe oxides, cation exchange capacity, and clay content.  P fractionation analysis after successive resin extraction showed that both labile and less labile in the form of NaHCO3-Pi and NaOH-Pi fractions, respectively, can be transformed into resin-Pi when in the most labile resin-Pi is depleted.  Most of P released in high oxides soils were from NaOH-Pi fraction while in low oxides soils were from NaHCO3-Pi.  P release from the former fraction resulted in the maximum P release lower than that of the latter one. When NaHCO3-Pi was high, NaOH-Pi was relatively more stable than NaHCO3-Pi despite resin-Pi removal. NaHCO3-Pi and NaOH-Pi are very important P fractions in replenishing resin-Pi in these acid upland soils.
Rekomendasi Pemupukan P Untuk Tanaman Jagung Pada Tanah Inceptisols Menggunakan Pendekatan Uji Tanah Syafruddin, .
JOURNAL OF TROPICAL SOILS Vol. 13 No. 2: May 2008
Publisher : UNIVERSITY OF LAMPUNG

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.5400/jts.2008.v13i2.95-102

Abstract

Productivity of maize in Central Sulawesi has been significantly low. The evidence has been a challenge on maize development in this area. Rational fertilization based on soil conditions and nutrient requirement of plants croped, has saved use of fertilizer, increased efficiency of the farm and also reduced negative impacts of chemical fertilizer. This will sustain the use of land resource. The researceh aimed to establish phosphorus fertilizer recomendation for maize crops at several levels of soil nutrients status in dryland rationally and spesicific location. The research was conducted in for stages i.e.: (1) survey on nutrient status, (2) calibration test and correlation study, (3) availability class determination of P and (4) composting P fertilizer recomendation. Split plot design was used. Main plot was soil nutrients status, consisting of 4 levels and sub plot was fertilizer dosage consisting of 5 levels, with 3 replications. The size of each plot was 4 m x 5 m. The results showed that the treatments applied indicated an interaction. Nutrient availability class and plant responses were divided by tree classes i.e: low, medium and high level with extraction methods (reagents) that excellently correlate, are Trough, Colwell and Bray 1 methods. Optimun dosage of P fertilizer for treatment were,  76 kg P2 O5 ha -1 for  low nutrient status 41 kg P2 O5  ha -1 for medium  nutrient status and   high nutrient status to nutrient status very high, P fertilizer was not required.
Local Rice Cultivars Grown On Tidal Swampland Near Coastal Area in South Kalimantan Purnomo, Erry; Setiawan, Muhammad Lestio; Yuliani, Nurmili; Atmaja, Ery; Wahyuni, Muhammad; Saidy, Ahmad Rizali; Osaki, Mitsuru
JOURNAL OF TROPICAL SOILS Vol. 13 No. 2: May 2008
Publisher : UNIVERSITY OF LAMPUNG

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.5400/jts.2008.v13i2.103-109

Abstract

Local farmers in South Kalimantan (Banjarese farmers) use to grow local rice cultivars. The local rice growing areas are varied with distance from the coastal line. Consequently, the degree of salinity also varied. To overcome the salinity problem, farmers do their last transplanting earlier than the farmers in the inland area and grow the local rice cultivars that they believe tolerant to salinity. In this study, we investigate the local rice cultivars grown by the farmers in the coastal areas. Sixty paddocks were selected in Pulantan, Aluh-Aluh, Simpang Warga and Bunipah Villages, Aluh-Aluh District, Banjar Regency, South Kalimantan. The rice yield of each paddock was estimated by sampling 3 x 5 hills in 3 replicates. The soil was collected within the 3 x 5 hills area and analysed their electric conductivity (EC) and pH. We found that there were four families of local rice cultivars grown, namely, Palas, Bayar, Pandak and Siam families. Among all local rice cultivars grown, it was revealed that Pandak Putih and Siam Unus produced the highest yields. However, according to the farmers, Palas and Bayar families are the common rice tolerant to salinity. The good price of Siam family and good yield of Pandak family at other paddocks might become the considerant of growing such rice families in the study site.

Page 45 of 82 | Total Record : 817

 43   44   45   46   47 

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