JOURNAL OF TROPICAL SOILS
https://journal.unila.ac.id/index.php/tropicalsoil
<p>Published three times a year in January, May and September. Articles are written in English. Print ISSN 0852-257X, online ISSN 2086-6682. Formerly, the name of the journal was Jurnal TANAH TROPIKA (Journal of Tropical Soils) and then became online as Journal of Tropical Soils.</p><p>Journal of Tropical Soils publishes all aspects in the original research of soil science (soil physic and soil conservation, soil mineralogy, soil chemistry and soil fertility, soil biochemistry, soil genesis and soil classification, soil survey and land evaluation, land development, environment management), and related subjects in which using soil from tropical areas.</p><p>Journal of Tropical Soils is indexed by <a href="https://scholar.google.com/citations?user=oqWufWoAAAAJ">Google Scholar</a> and <a href="http://isjd.pdii.lipi.go.id/">ISJD</a> (INDONESIAN SCIENTIFIC JOURNAL DATABASE); registered in and indexed by <a href="https://doaj.org/">DOAJ</a> (Directory of Open Access Journals), Academic Journals Database, <a href="https://www.crossref.org/">crossref </a>member since 2009 (crossref.org), and <a href="https://www.ebsco.com/">EBSCO</a> PUBLISHING since 2013, <a href="http://sinta2.ristekdikti.go.id/journals">SINTA</a>, and accredited B by Directorate General of Higher Education of Indonesia (DIKTI), SK No. 200/M/KPT/2020, 23 Desember 2020.</p><p><strong>Parent DOI:</strong><a href="http://dx.doi.org/" target="_blank"><strong> 10.5400/jts</strong></a><strong>.</strong></p><p> <a href="https://scholar.google.com/citations?user=oqWufWoAAAAJ"><strong>Profile in Google Scholar (Google Portal)</strong></a><strong>:</strong></p><p><strong> </strong></p><table width="268" border="1" cellspacing="0" cellpadding="0"><tbody><tr><td width="109"><p><strong>Cited by</strong></p></td><td width="64"><p><strong>All</strong></p></td><td width="95"><p><strong>Since 2017</strong></p></td></tr><tr><td><p>Citations</p></td><td>2811</td><td>1800</td></tr><tr><td><p>h-index</p></td><td><p>24</p></td><td>18</td></tr><tr><td><p>i10-index</p></td><td>98</td><td>60</td></tr></tbody></table>UNIVERSITY OF LAMPUNGen-USJOURNAL OF TROPICAL SOILS0852-257X<p><strong>License for Authors</strong></p><p>Authors who publish with this journal agree to the following terms:</p><ol><li>Authors retain copyright and grant the journal right of first publication with the work simultaneously licensed under a <a href="https://creativecommons.org/licenses/by/3.0/">Creative Commons Attribution License</a> that allows others to share the work with an acknowledgement of the work's authorship and initial publication in this journal.</li><li>Authors are able to enter into separate, additional contractual arrangements for the non-exclusive distribution of the journal's published version of the work (e.g., post it to an institutional repository or publish it in a book), with an acknowledgement of its initial publication in this journal.</li><li>Authors are permitted and encouraged to post their work online (e.g., in institutional repositories or on their website) prior to and during the submission process, as it can lead to productive exchanges, as well as earlier and greater citation of published work (See <a href="http://opcit.eprints.org/oacitation-biblio.html" target="_new">The Effect of Open Access</a>).</li></ol><p> </p><p><strong>License for Regular Users</strong></p><p>Other regular users who want to cite, distribute, remix, tweak, and build upon author’s works, even for commercial purposes, should acknowledge the work’s authorship and initial publication in this journal, licensed under a <a href="https://creativecommons.org/licenses/by/3.0/">Creative Commons Attribution License</a>.</p><p> </p>Assessing Leaching Requirement an Ameliorated Saline Soil in a Lysimeter Experiment
https://journal.unila.ac.id/index.php/tropicalsoil/article/view/549
Soil salinity problems in the coastal hinterland region of East Java diminish agricultural development and land productivity. Soil leaching is expected to reduce soil salinity. This study investigated the effectiveness of different ameliorant compositions and leaching requirements (LR) in the leaching process. The experiment involved applying ameliorants (T) and leaching (L) treatments to lysimeters filled with saline soil. The ameliorant treatments included biochar, organic matter, and gypsum. The results showed the leaching requirement capacity to reduce electrical conductivity from 5.7 dS m-1 to below 2 dS m-1. Leaching for T0 (without ameliorants) and T1 (10 Mg ha-1 of biochar) required 943 mm of water, while T2 (20 Mg ha-1 of biochar) and T3 (40 Mg ha-1 of compost) required 1052 mm. The T4 (10 Mg ha-1 of compost and 2 Mg ha-1 of gypsum) necessitated 1154 mm of leaching water. The ameliorants’ application and assortment increased the water demand for leaching. The findings indicated a consistent relationship between TDS and salinity, indicating the soil’s dominant presence of salty ions.Cahyoadi BowoVivi FitrianiMarga Mandala
Copyright (c) 2023 JOURNAL OF TROPICAL SOILS
http://creativecommons.org/licenses/by-sa/4.0
2023-10-242023-10-242911910.5400/jts.2024.v29i1.1-9Effect of Cyanobacteria-Enriched Compost on Maize (Zea mays. L) Growth and Yield and Nutrient Uptake in Inceptisols
https://journal.unila.ac.id/index.php/tropicalsoil/article/view/543
Increased production of food crops has various obstacles, including soil fertility, which is also caused by the price of inorganic fertilizers, which is burdensome for farmers. Organic and biofertilizers can reduce the use of inorganic fertilizers and the level of degradation of soil fertility. The research was conducted in the greenhouse of Indonesia Soil Research Institute in Bogor from October 2021 to March 2022. The treatments were laid out in a randomized block design consisting of 12 treatments with three replications, consisting of level doses of NPK combined with compost, cyanobacteria, and (Cyanobacteria-enriched compost). (NPK75%+compost) treatment gave the highest corn cobs and grain yield by 209.86 g plant-1 (8.55%) and 163.49 g plant-1 (6.42%), respectively compared to NPK100%. The treatment of (NPK75%+compost) gave a similar grain yield with 100% NPK and can scale down NPK used by 25%. (NPK50%+cyanobacteria-enriched compost) treatment increased N uptake by 48.81% compared to NPK100%. The treatment of (NPK50%+cyanobacteria-enriched compost) increased P uptake by 0.8 mg plant-1 or 17.0% compared to NPK50%+compost. At NPK50%+cyanobacteria, K uptake increased by about 31.46% compared to NPK50%.<br /><br />Trias OktaviyaniTamad TamadJati Purwani
Copyright (c) 2023 JOURNAL OF TROPICAL SOILS
http://creativecommons.org/licenses/by-sa/4.0
2023-12-112023-12-11291112110.5400/jts.2024.v29i1.11-21Dynamics of Tropical Peatlands Characteristics and Carbon Stocks as Affected by Land Use Conversion and Ages of Land Use in Riau Province, Indonesia
https://journal.unila.ac.id/index.php/tropicalsoil/article/view/548
The dynamics and patterns of relationships between the characteristics of Indonesian tropical peat involving a function of time (ages of land use) in the context of land conversion have yet to be widely reported. The effects of tropical peatland use change are generally discussed regarding C emissions, with the limited literature identifying dynamic soil characteristics as these changes occur. This study used a survey method. We identified the physical, chemical, and C stock characteristics of peat in forest locations, oil palm plantations with a land use age of 0-5 years,>5-10 years,>10 years, and agricultural land with a land use age of 0-5 years and >5-10 years to find out the dynamics of soil characteristics. Land use changes from peat swamp forests to oil palm plantations and agricultural land, and the longer age of land use results in an increase in BD (especially at the top layer), ash content, pH, Total-N, total-P2O5, total-K2O, but there was a decrease in water content, fiber content, Organic-C, E400/E600, and soil C stocks. The alignment of economic, social, and ecological interests was directed to water and land management by regulating the area’s hydrological system and increasing peat stability.Gian JulianoSuwardi SuwardiUntung Sudadi
Copyright (c) 2023 JOURNAL OF TROPICAL SOILS
http://creativecommons.org/licenses/by-sa/4.0
2023-10-242023-10-24291233210.5400/jts.2024.v29i1.23-32Impact of Super Absorbent Polymer and Polyacrylamide on Water Holding Capacity on Ultisol, Lampung
https://journal.unila.ac.id/index.php/tropicalsoil/article/view/503
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.Winih sekaringtyas RamadhaniPriyo CahyonoAkhmad SyaifudinAfandi Afandi
Copyright (c) 2023 JOURNAL OF TROPICAL SOILS
http://creativecommons.org/licenses/by-sa/4.0
2023-04-102023-04-10291334010.5400/jts.2024.v29i1.33-40Utilizing Coal ash and Lignite Enriched-Compost to Improve Chemical Properties of Ultisols
https://journal.unila.ac.id/index.php/tropicalsoil/article/view/537
Continuous monoculture activities can cause soil degradation, leading to low pH, organic matter content, and nutrient deficiencies in Ultisols. Compost has been used to improve soil fertility. Unfortunately, its effectiveness has been limited due to rapid decomposition in the humid tropic area. This study investigated the effect of adding coal ash (fly ash and bottom ash or abbr. as FABA) and lignite to compost on the chemical properties of degraded Ultisols planted with pineapple. The study was conducted at Pineapple plantation in Central Lampung using a split-plot design. The application technique (row or spread) was the main plot and three treatments as subplots were 100% compost (K), 75% compost + 25% FABA (KF), and 70% compost + 20% FABA + 10% lignite (KFL). Each treatment was applied at a dose of 50 Mg ha-1. The results showed that adding FABA and lignite to compost effectively increased the organic carbon, pH, base saturation, exchangeable calcium, -magnesium, -sodium, and zinc, decreasing the aluminum saturation of Ultisols. The application of ameliorants in rows technique was more effective than those of spreading. These findings suggest that FABA and lignite-enriched compost in row application can effectively improve the chemical properties of degraded Ultisols.Fadil FajarindoSuwardi SuwardiIskandar IskandarAtfritedy Limin
Copyright (c) 2023 JOURNAL OF TROPICAL SOILS
http://creativecommons.org/licenses/by-sa/4.0
2023-07-252023-07-25291414810.5400/jts.2024.v29i1.41-48Impact of Reforestation After Forest Fire on Infiltration and Other Soil Physical Properties
https://journal.unila.ac.id/index.php/tropicalsoil/article/view/529
Forest fires have become a vital issue causing various hydro-meteorological disasters. Many parties have carried out efforts. This study aimed to analyze the impact of land covers due to reforestation on infiltration rate and other soil physical properties related to hydrological conditions. The research was conducted in the Cempaka Forest area. There are four observed land covers, i.e., Timber Forest Products (TFP), Non-Timber Forest Products (NTFP), Pine, and Shrub. The results showed that land cover significantly affected the infiltration rate (p <0.05). The infiltration rate of Pine was not significantly different from NTFP but significantly different from TFP and Shrubs. The infiltration rate of Pine, NTFP, TFP, and Shrub land cover was 76.2 cm hr-1, 48.1 cm hr-1, 32.7 cm.hr-1, and 40.0 cm hr-1, respectively. The infiltration correlated with soil bulk density at two depths (0-15 cm and 16-30 cm) with r values of 0.614 and 0.595, respectively. Infiltration rate also significantly correlated with water content at pF 0 and pF 2.5 in the second soil depth. Additionally, soil bulk density is correlated with soil particle density with r = 0.621. Soil particle density also correlated with clay content with r equal to 0.726.Iva Dewi LestariningsihFilza Roholesi MewarAkmaludin Dimas AnggaraSarifudin LathifGhozian Putra SukbaraSativandi RizaKurniawan Sigit WicaksonoYumin Wang
Copyright (c) 2023 JOURNAL OF TROPICAL SOILS
http://creativecommons.org/licenses/by-sa/4.0
2023-07-252023-07-25291495810.5400/jts.2024.v29i1.49-58