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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 817 Documents
 70   71   72   73   74 
Characterization and Classification of Soils from Different Topographic Positions under Sugarcane Plantation in South Sulawesi, Indonesia Neswati, Risma; Lopulisa, Christianto; Adzima, Ahmad Faudzan
JOURNAL OF TROPICAL SOILS Vol. 24 No. 2: May 2019
Publisher : UNIVERSITY OF LAMPUNG

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.5400/jts.2019.v24i2.93-100

Abstract

The varied topography will influence the soil formation. This study aims to characterize and classify the soil selected on different topography positions of the sugarcane plantation area. The research was conducted in sugarcane plantation area of Camming, District of Bone, South Sulawesi, which was carried out from November 2017 to March 2018. This study used a descriptive method, observation and description of the nine soil profiles at three transects. Each transect consisted of three profiles points located in different positions, consisting of summit, backslope, and valleys. Each horizon soil samples were analyzed for their physical, chemical and micromorphology characteristics in the laboratory. Soil classification system was done by using soil taxonomy to the level of subgroups. The results showed that an average rainfall annual on the research location was 2.200 mm per year. Soil characteristics such as soil solum, cation exchange capacity, and sum of basic cations tended to increase in parts of the valley than in the back and summit. The primary mineral from the sand fraction included quartz, calcite, biotite, opaque, and orthoclase found especially in the position of the back and valley. The pore types consisted of vugh and packing void pores. Pedofeature type of soil was generally in the form of concretions and nodules that showed the process of oxidation and reduction. The soil type in the study area was classified into Typic Haplustepts and Typic Haplustalf.
Vermicast of Earthworm as Ecosystem Engineers within Different Vermireactor Shape Kilowasid, Laode Muhammad Harjoni; Sanjaya, Muhammad Fahyu; Rakian, Tresjia Corina; Alam, Syamsu; Djafar, Muhammad Kabil; Muliddin, Muliddin
JOURNAL OF TROPICAL SOILS Vol. 25 No. 2: May 2020
Publisher : UNIVERSITY OF LAMPUNG

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.5400/jts.2020.v25i2.83-92

Abstract

Earthworms as ecosystem engineers can modify the quality of vermibed assembled from mixed soil with organic material in a vermireactor. Various in shapes of the vermireactor are used to produce a vermicast for biofertilizer in agriculture. The objective of this research was to study the vermicast production and its quality produced from a variety of vermireactor shapes. Earthworm (Pheretima sp.) which was applied to the vermireactor consists of: with- and without of earthworms. Three shapes of the vermireactor, namely cylinder, square, and rectangular has been tested. Compost of Chromolaena odorata pruning mixed with soil was used as vermibed. The vermicast process ran until 28 days. The results showed that vermireactor with earthworms which were successfully converted to vermicast was about 49.24% from the vermibed volume, however, no vermicast formed was found from vermireactor without earthworms. The difference in vermicast produced from different vermireactor shapes was not significant. The value of pH, total-N, and C/N ratio among the vermicast was different. The number of the morphological character of bacteria colonies in the vermicast produced from the square vermireactor was the highest, while from cylinder vermireactor was the lowest. We concluded that the quality of vermicast from earthworm (Pheretima sp.) activity was determined by the shape of the vermireactor.
Mitigation Scenario for Reducing Greenhouse Gas Emission from Rice Field by Water Management and Rice Cultivars Pramono, Ali; Adriany, Terry Ayu; Susilawati, Helena Lina
JOURNAL OF TROPICAL SOILS Vol. 25 No. 2: May 2020
Publisher : UNIVERSITY OF LAMPUNG

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.5400/jts.2020.v25i2.53-60

Abstract

Rice production is a significant anthropogenic source of methane (CH4) and nitrous oxide (N2O), two important greenhouse gases (GHGs). Several strategies for reducing GHGs emissions from paddy fields are water management and the use of low emission rice cultivars. The purpose of this study was to determine the effects of water management and rice cultivars on the grain yield and greenhouse gas (GHG) emissions. The research was conducted at the Indonesian Agricultural Environment Research Institute (IAERI), Pati District, Central Java Province during the dry season 2017 (March-June 2017). The study used a factorial randomized block design with the first factor were water managements: A1 = continuous flooding at 5 cm height and A2 = alternate wetting and drying/AWD), and the second factor were rice cultivars: V1 = Ciherang, V2 = Inpari 32, V3 = Mekongga with three replications. All treatments received an equal amount of farmyard manure and inorganic fertilizers. GHG measurements were done by using a closed chamber method. The results of this study indicated that the combination of AWD treatment with Ciherang, Inpari 32, and Mekongga rice cultivars significantly reduced CH4 emissions by 23%, 46%, and 6%, respectively. The Inpari 32 rice variety produced the highest grain yield compared to others, but there were no significant differences in grain yield between all of the treatments. Therefore, AWD technique in combination with Inpari 32 rice cultivar could be a potential option for maintaining the yield-scaled global warming potential of rice production at a lower level, without reducing grain yield.
Texture and Chemical Properties of Two Depth Soils in a Toposequence of Anak Krakatau Before December 2018 Eruption Setiawati, Astriana Rahmi; Lumbanraja, Jamalam; Nurul Aini, Septi; Dermiyati, Dermiyati; Buchari, Henrie; Naspendra, Zuldadan
JOURNAL OF TROPICAL SOILS Vol. 25 No. 2: May 2020
Publisher : UNIVERSITY OF LAMPUNG

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.5400/jts.2020.v25i2.71-81

Abstract

Anak Krakatau volcano is one of the famous volcanic mountains located in the sea to the south part of the Province of Lampung, Indonesia. The volcano was derived from the active Krakatau caldera that first appeared on the surface in 1930 or 47 years after the eruption of Krakatau in 1883. The materials produced by the Anak Krakatau eruption were very interesting related to soil forming materials, especially their physical and chemical properties. The objectives of this study were to present information about the texture and chemical properties of soil from Anak Krakatau Mountain taken at the southeast slope before the December 2018 eruption at two different depths. This study was conducted in March to September 2019 which consisted of two parts: (1) soil survey in the field and (2) soil analysis in the laboratory. Soil samples were taken from a toposequence at seven points with an interval about 15m above sea level (asl) on the southeast slope (approaching northeast) of the Anak Krakatau in July 2018 at the depth of 0-20 cm and 20-40 cm. The soil texture of Anak Krakatau mountain before eruption in December 2018 was sandy with the percentage of sand 98.82 - 99.59%; silt 0 - 0.59%; and clay 0.41 - 0.74%. The soil chemical properties of Anak Krakatau mountain were soil pH (H2O) 4.95 – 6.27; soil pH (KCl) 4.75 – 5.89; Cation Exchange Capacity 0.41 – 2.02 cmol(+) kg-1; Base Saturation 117.24 – 514.63%; CaO 2.63 – 6.34%; MgO 3.06 – 6.13%; K2O 0.019 – 0.034%; Na2O 0.035 – 0.080%; P-retention 82.10 – 84.74%; and organic carbon 0.06 – 0.72%. The SEM-EDX analysis showed that the amounts of Mg and Na were more than 1% and there were several trace elements present in Anak Krakatau soil, namely Sb (Stibium), Nb (Niobium), Y (Yttrium), F (Flour), Co (Cobalt), and Ba (Barium).
An Evaluation of MODIS Global Evapotranspiration Product as Satellite-Based Evapotranspiration Data for Supporting Precision Agriculture in West Papua - Indonesia Faisol, Arif; Indarto, Indarto; Novita, Elida; Budiyono, Budiyono
JOURNAL OF TROPICAL SOILS Vol. 26 No. 1: January 2021
Publisher : UNIVERSITY OF LAMPUNG

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.5400/jts.2021.v26i1.43-49

Abstract

Precision Agriculture has been a significant issue since the middle of the 1980s. Evapotranspiration is one of the main parameters in precision agriculture to analyze real water needs in the agriculture area and managing water resources. Traditionally evapotranspiration estimates by directly measured methods, i.e., lysimeter, pan-evaporation, eddy covariance, Bowen ratio, soil water, and climate data analysis. These methods are expensive techniques with low spatial representativeness. The utilization of remote sensing technology is expected to be an alternative solution for providing evapotranspiration data with a cost-effective and high spatial representative. This research aims to evaluate the MODIS global evapotranspiration as satellite-based evapotranspiration in estimating evapotranspiration in West Papua. Four (4) statistical parameters, i.e., mean error (ME), root means square error (RMSE), relative bias (RB), and mean bias factor (MBF), are using for evaluation. The research showed that MODIS global evapotranspiration was overestimated in estimating evapotranspiration in West Papua. However, MODIS global evapotranspiration has an acceptable accuracy in estimating evapotranspiration in West Papua indicated by ME = 0.66 mm/day, RMSE = 0.94 mm/day, RB = 0.27, and MBF = 0.81. Therefore, MODIS global evapotranspiration can be used as an alternative solution for providing evapotranspiration data in West Papua with a cost-effective.
The Potential of Potassium Fertilizers in Improving the Availability and Uptake of Potassium in Rice Grown on Entisol Hartati, Sri; Suryono, .; Purnama, Lia Sari
JOURNAL OF TROPICAL SOILS Vol. 24 No. 2: May 2019
Publisher : UNIVERSITY OF LAMPUNG

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.5400/jts.2019.v24i2.83-91

Abstract

Entisol is a marginal soil spreading over some areas in Indonesia. It has loose soil consistency, low aggregation rates, sensitive to erosion, and low nutrient content. Entisol has high K deficiency.  Potassium plays an important role in rice growth (Oryza sativa). The aim of the research was to study the effects of  type and dose of potassium fertilizers on available K in Entisol and its uptake by rice plants. The study was arranged in a Randomized Complete Block Design with 2 factors, i.e. the types of potassium fertilizers (KCl, ZK and KNO3) and doses of potassium fertilizers (0 kg K2O ha-1, 50 kg K2O ha-1, 100 kg K2O ha-1, and 150 kg K2O ha-1), with three replications. The results showed that the type of potassium fertilizers applied resulted in similar effects on almost all soil and plant parameters. The dose of potassium fertilizers significantly affected all  soil and plant parameters, the higher the doses, the higher the values of the parameters observed.
Improvement of Soil Chemical Properties and Growth of Maize due to Biochar Application on Ultisol Taisa, Rianida; Maulida, Desi; Salam, Abdul Kadir; Kamal, Muhammad; Niswati, Ainin
JOURNAL OF TROPICAL SOILS Vol. 24 No. 3: September 2019
Publisher : UNIVERSITY OF LAMPUNG

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.5400/jts.2019.v24i3.101-107

Abstract

Ultisols have poor soil characteristics, yet biochar is one of the technologies that can be applied as a soil enhancer to improve the soil quality. Biochar has succeeded in improving soil quality, through improving soil physical, chemical, and biological properties. This research aimed to improve the quality of soil chemical properties and growth of maize plant, as well as to find a combination between biochar type and dosage of biochar that is able to improve the chemical properties of Ultisols and/or the growth of maize plant. This research was conducted at the Greenhouse and Soil Science Laboratory, Faculty of Agriculture, University of Lampung. This study used a randomized block design (RBD) arranged in factorial with 3 factors and 3 replications. The first factor was the soil layer (topsoil and subsoil), the second factor was the type of biochar (biochar of cocoa shell and biochar of oil palm shell), and the third factor was the biochar dosage (0, 10%, 20%, and 30% of 10 kg of oven dry weight soil). The results showed that (1) the application of biochar from the  cocoa shell and oil palm shell on Ultisols improved some parts of soil chemical properties, namely CEC, organic C, and Kexc, (2) application of biochar from the cocoa shell and oil palm shell on Ultisols increased the plant height, the number of leaves, and the dry weight of maize, (3) application of biochar from the cocoa shell at a dosage of 20% was significantly improved CEC of Ultisols (4) application of biochar from the cocoa shell in top soil at a dosage of 30% significantly improved the soil organic C of Ultisol, (5) application of  biochar from cacao shell at a dosage of  30%  was significantly improved Kexc, (6) application of biochar from oil palm shell at a dosage of 10% significantly increased maize plant growth.
Minimum Tillage and in situ Mulch Increasing the Population and Biomass of Earthworms Under Mung Bean Cultivation on Ultisol Soil Aini, Septi Nurul; Yusnaini, Sri; Tunsiyah, Tunsiyah; Niswati, Ainin
JOURNAL OF TROPICAL SOILS Vol. 24 No. 3: September 2019
Publisher : UNIVERSITY OF LAMPUNG

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.5400/jts.2019.v24i3.141-148

Abstract

Earthworms are important soil biota that can be used as  an indicator of soil fertility. Soil tillage systems and application of organic mulch will affect the activity of earthworms. This research was aimed to study the effect of tillage systems and the application of in situ mulch, and their interactions on the population and the biomass of earthworms. The study was conducted from April to July 2017 at the Integrated Field Laboratory, Faculty of Agriculture, University of Lampung. The study was arranged in a Randomized Block Design (RBD) in a factorial treatment with two factors.  The first factor was the tillage system  which consisted of the minimum tillage and the intensive tillage. The second factor was the application of in situ mulch, which consisted of the application of 0 Mg ha-1 or without mulch and the application of 5 Mg ha-1  in situ mulch.The data obtained were tested for homogeneity of variance with the Bartlett Test and its additivity with the Tukey Test. Data were further analyzed for the analysis of variance and for the LSD’s Test at the level of 5%. The relationship between soil temperature, soil moisture content, soil organic-C and soil pH with population and biomass earthworm was tested by correlation test. The results showed that the earthworm population and the earthworm biomass at 80 DAP in the minimum tillage  was higher than that of the intensive tillage. The earthworm population for all detected planting stages (before tillage, 40 DAP and 80 DAP) with the of application of 5 Mg ha-1 in situ mulch was higher than that of the application of no mulch.  There is no interaction between the tillage system and the application of in situ mulch at 0 DAP, 40 DAP, and 80 DAP.  The genus of earthworms found in all treatment plots was genus Pheretima under the family of Megascolecidae.
The Diversity of Mycorrhiza Arbuscular Fungi in Several Types of Peatland Utilization in Sungai Asam Village Kubu Raya District Zulfita, Dwi -; Hariyanti, Agus; Surachman, Surachman
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.v25i3.165-171

Abstract

The purpose of this study was to determine the diversity of FMA from the rhizosphere of cassava, corn, taro, ginger, kale, pineapple which was cultivated in the Sungai Asam peatland by using a corn plant host. This research was conducted at the Soil Biology and Biotechnology Laboratory of the Faculty of Agriculture and plastic houses in the Universitas Tanjungpura Faculty of Agriculture’s experimental garden. The study was conducted from August 2nd to October 21st, 2018. The procedure was done by taking soil and root samples from cassava, corn, taro, and peanut rhizosphere cultivated on peatland. A sampling of soil and roots in each rhizosphere was carried out at 4 observation points as replication with a depth of 0-20 cm and a diameter of 20 cm and then put into a plastic bag and labeled. Then, the soil samples taken were used for microscopic analysis (extraction and identification) and were analyzed to determine their chemical properties. Root samples were colorized to determine the percentage of colonization, and corns were used to cultivate. Furthermore, extraction and identification of spores were carried out using the same technique as extraction and identification of soil samples. The variables observed included the percentage of root colonization, spore density, and spore diversity. The FMA diversity of the 6 types of peatland utilization from the rhizosphere of cassava, corn, taro, ginger, pineapple, and kale in the Sungai Asam village before and after trapping showed an increase in the number of spores, diversity of FMA”while the percentage value of root colonization was varied. Moreover, the number of spores increased from around 36 - 52 spores per 50 g of soil to 61 - 178 spores per 50 g of soil. The diversity of spore types increased from 10 types of Glomus, 1 type of Gigaspora, and 4 types of Acaulospora to 13 types of Glomus, 3 types of Gigaspora, and 5 types of Acaulospora. The highest percentage of infected roots before trapping ranged from 48.89% - 78.48% and after trapping ranged from 78.89% - 94.80%.
Lignite-based Organic Fertilizer Improves Soil Quality and Yield of Rice in Belitang South Sumatera Syafrullah, Syafrullah
JOURNAL OF TROPICAL SOILS Vol. 24 No. 3: September 2019
Publisher : UNIVERSITY OF LAMPUNG

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.5400/jts.2019.v24i3.109-117

Abstract

To achieve food-self sufficiency in Indonesia, it is necessary to apply sustainable agriculture practices to improve soil quality. Most of paddy fields have been applied with chemical fertilizers intensively for more than 40 years without the addition of organic matter.  The purpose of this study was to understand the effects of lignite-based organic fertilizer application on the quality of paddy soil and yield of rice. The study was conducted in April until August 2014 in the irrigated rice fields in Belitang, Ogan Komering Ulu Timur District. The study was arranged in a Factorial Randomized Block Design, with 9 treatment combinations and 3 replicates. The first factor was the types of fertilizers, consisting of recommended chemical fertilizers (250 kg urea ha-1 + 150 kg SP36 ha-1 + 50 kg KCl ha-1), organic fertilizer from plant residue at 5 Mg ha-1,  and lignite-based organic fertilizer (namely Baranik fertilizer) at 0.75 Mg ha-1.  The second factor was rice varieties, consisting of Mentik Wangi, Gogo Aromatik and Ciliwung. The application of Baranik fertilizer at 0.75 Mg ha-1 has improved the quality of paddy soil with the increase of organic-C content from 1.44% to 2.90%. Application of Baranik fertilizer at 0.75 Mg ha-1 has increased the vegetative components and the yield of rice about 7.17 Mg ha-1 compared to the organic fertilizer from plant residue, but the yield is still the same as that in the recomended dosages of chemical fertilizers.  Among the rice varieties, the yield of Ciliwung variety was higher than other varieties, i.e. 7.62 Mg ha-1.  The yield of Gogo Aromatik variety is significantly lower than that of Ciliwung variety.  Baranik organic fertilizer can be used to improve soil fertility for food security purpose.

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