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Journal of Tropical Crop Science
Published by Institut Pertanian Bogor
ISSN : 23560169     EISSN : 23560177     DOI : -
Core Subject : Agriculture,
Agriculture, Biological Sciences & Forestry
Journal of Tropical Crop Science is an international journal publishing research related to tropical crops. Articles in the journal focus on in-vivo and in-vitro production and production environment, breeding, seed technology, physiology, postharvest, pest and pathology of cereals, vegetables, fruits, ornamentals, medicinal and plantation crops; soil, landscape, turf and agro ecology management under tropical conditions.
Arjuna Subject : -
Articles 315 Documents
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Economic Viability and Ecological Outcomes of Organic Horticulture: Evidence from Highland Farming Communities in Bali, Indonesia Sukanteri, Ni Putu; Joshi, Ravindra Chandra; Yuniti, I Gusti Ayu Diah; Kamarudin, Ahmad Syazni
Journal of Tropical Crop Science Vol. 13 No. 01 (2026): Journal of Tropical Crop Science
Publisher : Department of Agronomy and Horticulture, IPB University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29244/jtcs.13.01.212-226

Abstract

Organic horticulture is an essential component of sustainable agriculture, offering agronomic, ecological, economic, and social benefits. This study investigates the economic viability and ecological outcomes of organic horticultural practices among highland farming communities in Bali, Indonesia. Utilizing a case study of certified organic farmer groups, data were collected via interviews, field observations, and secondary sources. Analysis included market trends, cost-benefit ratios, productivity, and environmental indicators. Findings show that organic horticulture enhances soil fertility with compost and manure, and manages pests through crop rotation, intercropping, and plant derived pesticides. Economically, organic horticulture is highly profitable, with a benefit-cost (B/C) ratio of 14.18, driven by strong consumer demand for pesticide-free produce in urban and tourist markets. Environmentally, organic farming reduces chemical contamination, boosts soil organic matter, and strengthens agroecosystem resilience. Socially, it promotes cooperative farming, knowledge sharing, and community engagement. Challenges include higher input costs, complex certification processes, and limited access to organic farming technology. This research’s novelty is its integrative assessment of agronomic productivity, environmental sustainability, and economic feasibility in a unique tropical context, offering a holistic sustainability model. Findings contribute to organic agribusiness theory, sustainable development, and resilient food system policymaking.
Effects of Chicken Manure Dose and Application Timing on the Productivity and Microbiological Safety of Lettuce (Lactuca sativa L.) Undari, Desti; Melati, Maya; Kurniawati, Ani
Journal of Tropical Crop Science Vol. 13 No. 01 (2026): Journal of Tropical Crop Science
Publisher : Department of Agronomy and Horticulture, IPB University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29244/jtcs.13.01.227-240

Abstract

Organic lettuce is widely regarded as a healthier alternative because it is free of chemical contaminants. Chicken manure is commonly used as an organic fertilizer because of its high nutrient content, which is readily available to plants. However, applying manure poses a risk of pathogenic bacterial contamination. This study aimed to evaluate the effects of different chicken manure doses and application times, as well as their interactions, on lettuce (Lactuca sativa L.) productivity and microbiological safety. The experiment was conducted from March to May 2023 in Cianjur, West Java, using a factorial randomized block design (RBD) with three replications. Treatments included a control and two factors: (1) manure dose (10, 20, and 30 t/ha), and (2) application times (1, 2, and 3 weeks before transplanting). Microbiological analysis of harvested lettuce leaves was performed in the laboratory to assess contamination levels of Escherichia coli, Salmonella spp., and Shigella spp. Manure doses significantly influenced all growth and yield parameters but had no significant effect on quality variables, including flavonoid, nitrate, and total chlorophyll content. Application times showed no significant effect on any measured parameter. The interaction between dose and time was also not statistically significant for most variables. The highest productivity and marketable yield were observed at the 30 t/ha dose. Salmonella spp. was not detected in any samples; however, E. coli and Shigella spp. were present in all samples at levels exceeding the Indonesian National Standard (SNI) for food safety. In addition to the required dose of chicken manure, to minimize microbial contamination, fully decomposed manure is recommended for application, as it can be applied to land shortly before planting. The use of microbial-free water for washing vegetables is recommended, including in further research.
Improved Performance of SiDREB2-SNAP Marker in Foxtail Millet by Optimum Primer Concentration, PCR Cycle, and DNA Polymerase Specificity Wospakrik, Andrean Heskiel; Rizqullah, Ramadaniarto; Pahlevi, M Reza; Yudiansyah, Yudiansyah; Purwoko, Bambang Sapta; Suwarno, Willy Bayuardi; ARDIE, Sintho Wahyuning
Journal of Tropical Crop Science Vol. 13 No. 01 (2026): Journal of Tropical Crop Science
Publisher : Department of Agronomy and Horticulture, IPB University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29244/jtcs.13.01.103-113

Abstract

Foxtail millet (Setaria italica L. Beauv.) is an emerging carbohydrate-producing crop. It is considered a climate-resilient crop due to its tolerance to abiotic stresses. Breeding for abiotic-tolerant crops requires powerful tools such as molecular markers. The single-nucleotide amplified polymorphism (SNAP) marker, developed from a single-nucleotide DNA variation at a specific location in the plant genome, is a simple yet powerful PCR-based marker widely used in phenotype-related selection. A SiDREB2-based SNAP marker was previously developed based on a base variation at the 558th base pair (an A/G transition) in the SiDREB2 gene and used to estimate the drought tolerance in foxtail millet. However, the specificity of the marker depends on technical aspects, including the type of DNA polymerase used, primer concentration, and the number of PCR cycles. Here, we reported that non-specific and false positive amplicons can be eliminated by utilizing DNA polymerase with no 3’ to 5’ proofreading activity and reducing the final primer concentration to 1.25 μM. PCR cycle number 25 yielded the optimum specificity, while increasing the cycle to 30 resulted in false positive results. Altogether, our results showed that technical optimization is necessary for improving the specificity of the SNAP marker.
Coffee (Coffea spp.) Production Systems, Postharvest Innovations, and Quantitative and Agroecological Dynamics in the Davao Region, Philippines Bautista, Cheryll L.; Valdez, Gemma M.; Erespe, Marites S.; Bastida, Garry L.; Magallones, Maria Odessa G.; Campo, Ruel G.; Pantoja, Felicitas B.; Nemenzo-Calica, Phoebe
Journal of Tropical Crop Science Vol. 13 No. 01 (2026): Journal of Tropical Crop Science
Publisher : Department of Agronomy and Horticulture, IPB University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29244/jtcs.13.01.174-186

Abstract

Coffee (Coffea spp.) is a globally significant tropical plantation crop, and the Davao Region in the Philippines is one of the country’s most dynamic production zones, thanks to its favorable volcanic soils, diverse microclimates, and evolving value chain ecosystems. With an estimated 15,821.68 ha under cultivation, the region supports all major Coffea species. Coffea arabica thrives above 1,000 m asl in highland zones such as Balutakay, Maragusan, and upland Davao City; Robusta dominates lower elevations, while Liberica and Excelsa occupy smaller areas as complementary tropical crop components. Agroecological sustainability is promoted through shade-based agroforestry systems that enhance biodiversity, soil fertility, and climate resilience. Postharvest innovations such as natural, honey, and micro-lot fermentation, alongside the expansion of community-based roasting facilities, have enabled specialty-grade production and improved access to premium domestic and international markets. Emerging trends presented at the Davao Regional Coffee Expo (DRCE) 2025 include the increased adoption of climate-resilient genetic varieties artificial intelligence-based plantation monitoring, gender-inclusive entrepreneurship, and youth participation in value-added roles such as roasting, cupping, and barista craftsmanship. However, persistent constraints, including aging plantations, low productivity, limited seedling supply, postharvest infrastructure gaps, market dependency on intermediaries, and inconsistent institutional support, continue to limit the sector’s tropical crop competitiveness. This status report consolidates insights on production systems, agroecological management, postharvest innovations, and socio-economic challenges to provide a strategic outlook for strengthening coffee as a sustainable tropical plantation crop within the Davao Region and similar highland environments in Southeast Asia.
Purple Cleome (Cleome rutidosperma) Growth, Yield, and Total Flavonoid Under Different Media Compositions and Harvesting Frequencies Dardiri, Dardiri; Aziz, Sandra Arifin; Melati , Maya
Journal of Tropical Crop Science Vol. 13 No. 01 (2026): Journal of Tropical Crop Science
Publisher : Department of Agronomy and Horticulture, IPB University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29244/jtcs.13.01.160-173

Abstract

Purple cleome (Cleome rutidosperma) is a medicinal plant known for its flavonoid content, which confers multiple pharmacological benefits. However, cultivation methods to optimize both biomass production and bioactive compound accumulation remain underdeveloped. This study aimed to assess the influence of planting media composition and harvesting frequency on the growth, yield, and total flavonoid concentration of purple cleome. The experiment was conducted in Gunung Batu, Bogor, Indonesia, from January to April 2025, employing a two-factor randomized block design. The first factor was planting media composition, with four treatments: 100% soil (0) and soil mixed with cow manure at ratios of 1:1, 1:2, and 1:3 (v/v). The second factor was harvesting frequency, with two levels: A single harvest at 8 weeks after planting (WAP) and two harvests at 4 and 8 WAP. Results indicated that all tested media compositions supported plant growth effectively. Notably, total flavonoid concentration was significantly higher at 4 WAP compared to 8 WAP. Moreover, cumulative flavonoid yield from two harvests was significantly greater, reaching 5,639.80 mg quercetin equivalents (QUE) per plant dry weight, compared to 1,456.50 mg QUE per plant from a single harvest. These findings suggest that harvesting at multiple intervals enhances flavonoid yield in purple cleome cultivation.

Page 32 of 32 | Total Record : 315

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