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INDONESIA
Jurnal Agronomi Indonesia (Indonesian Journal of Agronomy)
Published by Institut Pertanian Bogor
ISSN : 20852916     EISSN : 23373652     DOI : -
Core Subject : Economy, Agriculture,
Agriculture, Biological Sciences & Forestry Economics, Econometrics & Finance
Aims and Scope Aims Indonesian of Journal Agronomy (Jurnal Agronomi Indonesia), the official journal of the Indonesian Society for Agronomy, publishes primary research paper, review article, policy analysis and research notes and preliminary results in all areas of agronomy. Manuscripts could be written either in English or in Indonesia. Scope Indonesian of Journal Agronomy (Jurnal Agronomi Indonesia) covers agronomy in broad sense including plant production, genetic and plant breeding, plant physiology, plant ecology, plant biotechnology, modeling, seed science and technology and weeds science on food, horticulture, plantation, and forage crops.
Arjuna Subject : Ilmu Pertanian dan Biologi (Semua) - Agronomi dan Ilmu Tanaman
Articles 974 Documents
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Shallot distribution model under hydroclimatic extremes and soil physical properties in Sleman, Yogyakarta Umi Munawaroh; Muhamad Khoiru Zaki; Susilowati; Muhammad Rahman Yulianto
Jurnal Agronomi Indonesia (Indonesian Journal of Agronomy) Vol. 53 No. 3 (2025): Jurnal Agronomi Indonesia (Indonesian Journal of Agronomy)
Publisher : Indonesia Society of Agronomy (PERAGI) and Department of Agronomy and Horticulture, Faculty of Agriculture, IPB University, Bogor, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24831/jai.v53i3.69500

Abstract

Global climate change significantly affects the agriculture sector, including reducing crop productivity and potential distribution through the frequency of hydrometeorological disasters. Despite its economic importance, limited research has explored the effects of such hydroclimatic extremes on shallot (Allium cepa var. aggregatum) cultivation. This study aims to identify the soil-climate conditions, extreme events, variable contributions, and potential distribution areas of shallot in Sleman regency. The MaxEnt model was used herein to predict the suitable distribution area of shallot under hydroclimatic extremes and soil physical properties. The results show that shallot potential distribution in Sleman regency is governed by the synergistic action of climatic extremes and soil physical structure based on MaxEnt analysis. The dominance of Consecutive Dry Days (CDD) and soil moisture underscores the necessity of maintaining a stable soil–water equilibrium under intensifying hydroclimatic variability. These insights support the use of high-resolution soil and climate mapping to inform adaptive irrigation scheduling, precision tillage, and organic amendment strategies. Keywords: Climate change; extreme events, maximum entropy, soil properties, species distributions
Photosynthetic activities of oil palm and its understory cover crops under shade Jumena Adijaya; Herdhata Agusta; Sudrajat Sudrajat; Supiandi Sabiham; Triadiati Triadiati
Jurnal Agronomi Indonesia (Indonesian Journal of Agronomy) Vol. 54 No. 1 (2026): Jurnal Agronomi Indonesia (Indonesian Journal of Agronomy)
Publisher : Indonesia Society of Agronomy (PERAGI) and Department of Agronomy and Horticulture, Faculty of Agriculture, IPB University, Bogor, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24831/jai.v54i1.67921

Abstract

Photosynthesis is a key part of how oil palm ecosystems store carbon. The net CO₂ assimilation rate is greatly affected by the concentration of CO₂ between cells (Ci). Nonetheless, data on the assimilation–intercellular CO₂ (A/Ci) response of oil palm and understory vegetation in shaded mineral soil conditions remain inadequate. This study aimed to assess the A/Ci response characteristics and essential photosynthetic variables of oil palm (Elaeis guineensis Jacq.) and two understory cover crops, Asystasia gangetica and Nephrolepis biserrata, cultivated beneath mature oil palm canopies. The study was conducted at the Cikabayan Teaching Farm, IPB University, Bogor, Indonesia. A portable photosynthesis system was used to measure gas exchange variables at different times of the day. These included net CO₂ assimilation rate (A), stomatal conductance, transpiration rate, and intercellular CO₂ concentration (Ci). The results indicated clear physiological differences in the responses of canopy and understory vegetation. The Ci values of oil palm remained fairly stable throughout the observation period. On the other hand, understory species showed greater changes, requiring more Ci in the morning and less in the afternoon. Nephrolepis biserrata exhibited higher net assimilation than A. gangetica, indicating greater photosynthetic efficacy in shaded environments. These findings underscore the divergent photosynthetic regulation between canopy and understory vegetation, underscoring the significance of understory plants in facilitating carbon assimilation dynamics in shaded oil palm ecosystems. Keywords: absorption of CO2; Asystasia gangetica; Nephrolepis biserrata; stomatal conductances
Application time of Wedelia trilobata leaf extract as a bioherbicide for controlling dominant weeds in soybeans Faisal Abdillah; Dyah Weny Respatie; Aziz Purwantoro
Jurnal Agronomi Indonesia (Indonesian Journal of Agronomy) Vol. 54 No. 1 (2026): Jurnal Agronomi Indonesia (Indonesian Journal of Agronomy)
Publisher : Indonesia Society of Agronomy (PERAGI) and Department of Agronomy and Horticulture, Faculty of Agriculture, IPB University, Bogor, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24831/jai.v54i1.70636

Abstract

Wedelia leaf extract at a 40% concentration has been reported as an effective bioherbicide for inhibiting the growth of Cyperus rotundus, a dominant weed in soybean cultivation; however, information regarding the most effective application timing remains unavailable. Consequently, this study aimed to determine the optimal application time of Wedelia (Wedelia trilobata L.) leaf extract as a bioherbicide to control dominant weeds, specifically broadleaf weed (Tridax procumbens L.) and purple nutsedge (Cyperus rotundus L.), in soybean crops. The research employed a split-plot design, where the main plots consisted of the plant species (Tridax procumbens, Cyperus rotundus, and soybean), while the subplots consists of three application timings: 7 days before planting (D-7), at the time of planting (D0), and 7 days after planting (D+7), which were then compared against a C0- (negative control=without treatment) and a C0+ (positive control=using the chemical herbicide Pendimethalin (application within 7 days before planting) with dose 3 L ha-1). The results indicated that 7 days before planting (D-7) was the most effective time for applying the 40% Wedelia leaf extract in inhibiting the growth of Tridax procumbens and Cyperus rotundus in soybean cultivation. Keywords: Cyperus rotundus; timing application; Tridax procumbens; weed control
Pluchea indica metabolites production under chicken manure application in the rainy season Haya Azharul Jinan; Sandra Arifin Aziz; Maya Melati; Youngkwan Cho; Yulia Rahmah
Jurnal Agronomi Indonesia (Indonesian Journal of Agronomy) Vol. 54 No. 1 (2026): Jurnal Agronomi Indonesia (Indonesian Journal of Agronomy)
Publisher : Indonesia Society of Agronomy (PERAGI) and Department of Agronomy and Horticulture, Faculty of Agriculture, IPB University, Bogor, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24831/jai.v54i1.71092

Abstract

Indian camphorweed (Pluchea indica), an indigenous vegetable, has promising potential as a cosmetic raw material because of its bioactive compounds. Research on cultivation techniques is relatively underexplored in agronomic research, particularly in fertilization practices for P. indica in the rainy season, a period that is critical for tropical agriculture. This study aimed to determine the optimal chicken manure dosage for the growth and yield of four-month-old Indian camphorweed during the rainy season. The experiment was conducted at IPB University, Indonesia, from November 2023 to February 2024. A randomized complete block design (RCBD) was applied, consisting of four chicken manure dosages: 0, 2.5, 5.0, and 7.5 kg per plant, with three replications. Results showed that chicken manure application was found to enhance vegetative growth, branching, leaf yield, and leaf N and K status, indicating its suitability as an organic nutrient source under high-rainfall conditions. Regression analysis indicated the optimal dosage of chicken manure was 7.00 kg per plant for fresh weight yield at 27 weeks after planting (WAP). Chicken manure application changes the phenolic content and antioxidant capacity, that suggest the trade-offs between yield improvement and certain aspects of functional quality. Keywords: Indian camphorweed; optimum dosage; organic fertilizer

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