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Agricultural Science
Published by Universitas Merdeka Surabaya
ISSN : 25985167     EISSN : 25978713     DOI : -
Core Subject : Agriculture,
Agriculture, Biological Sciences & Forestry
AGRICULTURAL SCIENCE is a peer-reviewed, scientific journal published by Faculty of Agriculture Merdeka University Surabaya, ISSN 2597-8713 (Online) - 2598-5167 (Print). The aims of the journal are to publish and disseminate high quality, original research papers and article review in plant science i.e. agronomy, horticulture, plant breeding, soil sciences, plant protection, agricultural technology, agricultural agribusiness, agricultural economy and other related fields related to agriculture. AGRICULTURAL SCIENCE is published twice a year.
Arjuna Subject : Ilmu Pertanian dan Biologi (Semua) - Agronomi dan Ilmu Tanaman
Articles 14 Documents
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Search results for , issue "Vol. 9 No. 2 (2026): March In Progress" : 14 Documents clear
Gapoktan Partnership as a Mediator of Social Capital and Motivation for Sustainable Ipomoea reptans Poir Farming Susanto, Heri; Syahrial, Ramon; Dianto, Andri Krisna
Agricultural Science Vol. 9 No. 2 (2026): March In Progress
Publisher : Faculty of Agriculture, Merdeka University Surabaya, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55173/agriscience.v9i2.184

Abstract

The cultivation of Ipomoea reptans Poir in Balongpanggang District, Gresik Regency, serves as an adaptive response to post-harvest drought in rice fields and reflects the potential for sustainable agriculture. This study aims to analyse the mediating role of the Farmers’ Group Association (Gapoktan) in the relationship between social capital and farmer motivation towards sustainable farming practices. A mixed-methods design was employed, involving quantitative data from 35 farmers using a census approach and qualitative data from 39 Focus Group Discussion (FGD) participants. The quantitative data were analysed using Structural Equation Modelling–Partial Least Squares (SEM–PLS), while the qualitative data were examined thematically. Results revealed that social capital had a significant positive effect on Gapoktan partnerships (O = 0.482, p < 0.001), and Gapoktan partnerships significantly influenced sustainable agriculture (O = 0.516, p < 0.001). Mediation analysis confirmed that Gapoktan strongly mediated the relationship between social capital and sustainable agriculture (O = 0.249, p = 0.001). However, farmer motivation had a positive but insignificant effect on both Gapoktan partnerships (p = 0.190) and sustainable agriculture through Gapoktan mediation (p = 0.279). The study concludes that sustainable I. reptans Poir farming is primarily driven by social capital channelled through Gapoktan partnerships, while motivation alone is insufficient without institutional reinforcement. Strengthening Gapoktan’s strategic role in collective marketing, capital access, and knowledge transfer is essential to transform existing social solidarity into a sustainable, inclusive agribusiness ecosystem.
Inventory Management as a Driver of Supply Chain Performance in Agricultural Value Chains: A Lean Theory Perspective from Kenya Enock Musau Gideon
Agricultural Science Vol. 9 No. 2 (2026): March In Progress
Publisher : Faculty of Agriculture, Merdeka University Surabaya, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55173/agriscience.v9i2.185

Abstract

Inventory management is a critical supply chain practice with significant implications for supply chain performance, especially in agricultural value chains that face challenges of perishability, demand fluctuations, and resource constraints. Guided by Lean Theory, this study examined the effect of inventory management on supply chain performance within Kenya’s agricultural supply chains using a quantitative explanatory research design. Primary data were collected through a structured questionnaire administered to employees across agricultural directorates. Reliability analysis confirmed strong internal consistency (α = 0.743 for inventory management; α = 0.850 for supply chain performance). Principal component analysis validated construct measurement (KMO = 0.769, p < 0.001). Regression results showed that inventory management significantly and positively predicts supply chain performance (β = 0.265, t = 6.120, p < 0.001), highlighting its role as a key determinant of efficiency and competitiveness. The study concludes that inventory management practices such as vendor-managed inventory, just-in-time replenishment, and stock transparency are indispensable for enhancing supply chain performance in Kenya’s agricultural sector. It recommends that policymakers and managers invest in Lean-inspired inventory strategies to optimize resource use, reduce waste, and build resilient agricultural supply chains.
Effectiveness of Neem Leaf Extract And Packaging Types On The Quality of Cilembu Variety Sweet Potato Tazkia Mega Aulya; Putra Rizky Nugraha; Tety Suciaty1
Agricultural Science Vol. 9 No. 2 (2026): March In Progress
Publisher : Faculty of Agriculture, Merdeka University Surabaya, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55173/agriscience.v9i2.188

Abstract

Proper postharvest handling is a critical factor in maintaining the quality of sweet potatoes (Ipomoea batatas L). This research evaluated the effectiveness of neem leaf (Azadirachta indica A. Juss) extract concentration and packaging type in inhibiting sprouting, reducing infestation by the sweet potato weevil (Cylas formicarius), and maintaining weight loss, starch content, and total dissolved solids in Cilembu variety sweet potatoes during storage. This experiment used a Completely Randomized Design with three replications, consisting of neem extract concentrations (0, 10, 20 ml/L) and packaging types (jute sacks, polinet nets, bamboo baskets). Neem leaves contain azadirachtin compounds which can preserve the physiological quality of sweet potatoes from pest attacks. The higher the concentration, the higher the level of effectiveness in maintaining and preserving the physiological quality of sweet potatoes during storage therefore, this study tested neem leaf extract concentrations of (0, 10, 20 ml/L). Results showed that the combination of 10 ml/L and 20 ml/L neem leaf extract with poly-net packaging yielded the best overall quality. This treatment significantly reduced sweet potato weevil infestation by up to 99.4% and suppressed weight loss by up to 33.8%, while maintaining more stable starch content and total soluble solids. The 10 ml/L and 20 ml/L neem leaf extract demonstrated optimal insecticidal properties, while the poly-net packaging provided the best ventilation for releasing respiratory heat and controlling moisture accumulation compared to jute sacks and bamboo baskets. In conclusion, the combination of 10 ml/L and 20 ml/L neem leaf extract with poly-net packaging is effective in maintaining the quality of Cilembu variety sweet potatoes during storage.   
The Effect of Seaweed Extract Biostimulant on Growth and Yield of Eggplant (Solanum melongena L.) Athillah Ramadhani; Ad’Diva Ahmad Fadhil Aryodya; Putri Nabila Maharani; Dukat
Agricultural Science Vol. 9 No. 2 (2026): March In Progress
Publisher : Faculty of Agriculture, Merdeka University Surabaya, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55173/agriscience.v9i2.190

Abstract

Eggplant possesses high economic value with various nutritional contents such as minerals and vitamins that are benefical for human health. However, productivity decline due to environmental stress poses a challenge in global market demand fulfillment. The application of biostimulants represents one solution to enhance the growth and yield of eggplant (Solanum melongena L.). This research aimed to examine the effect and optimal concentration of biostimulant application on eggplant plants. The study was conducted in cultivation fields located in Nanggela Village, Kuningan Regency, West Java, from July to October 2025. This experiment used Randomized Block Design (RBD) with nine biostimulant concentration treatments and three replications, resulting in 27 experimental plots, each measuring 3,5 x 1,5 meters, consisting 14 plants and a 50 cm spacing between plots, 50 cm spacing between plants, and 60 cm spacing between rows. The vegetative phase observation parameters included root length, root volume, plant height, stem diameter, number of leaves, leaf area, leaf area index, plant dry weight, and relative growth rate, while the generative phase parameters included number of fruits, fruit diameter, fruit length, fruit weight, and yield weight per plant. The data obtained were analyzed using one-way analysis of variance (ANOVA), followed by the Scott-Knott cluster analyses to determind significant differences among treatments. The results showed that biostimulants had a significant effect on growth and development aspects. Specifically, biostimulant application significantly affected both vegetative and generative parameters. The best vegetative characteristics were obtained in K1 (1,0 ml/l), K2 (1,5 ml/l), and K3 (2,0 ml/l) treatments, while the optimal generative characteristics were produced in K1 (1,0 ml/l), K2 (1,5 ml/l), K4 (2,5 ml/l), and K7 (4,0 ml/l) treatments.
Impact of Petroleum Industry Activities on Basic Soil Physical and Chemical Properties: A Case Study PT Pertamina EP Cepu Bojonegoro, Indonesia AH. Maftuh Hafidh Zuhdi; Tandaditya Ariefandra Airlangga; Irene Zaqyah
Agricultural Science Vol. 9 No. 2 (2026): March In Progress
Publisher : Faculty of Agriculture, Merdeka University Surabaya, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55173/agriscience.v9i2.191

Abstract

Petroleum industrial activities have the potential to alter soil physical and chemical properties through various contamination mechanisms and operational processes. This research aimed to evaluate the impact of PT Pertamina EP Cepu petroleum industrial activities on basic physical and chemical soil properties in areas surrounding operations. The study was conducted from October to November 2025 using a descriptive survey approach with purposive sampling method. Soil samples were collected at 0-20 cm depth from 12 sampling points located within a ± 200-meter radius in four cardinal directions (North, East, South, and West) from the operational center. Physical properties analyzed included soil texture, bulk density, and porosity, while chemical properties included pH, C-Organic, total N, available P, exchangeable K, and electrical conductivity (EC). Data analysis was performed descriptively by comparing laboratory measurement results with soil property assessment criteria established by Balai Penelitian Tanah to categorize each parameter and identify soil quality degradation levels in the research area. The results showed that soil in the research area had clay texture (67% clay fraction), high bulk density (1.47 ± 0.21 g/cm³), moderate porosity (44.5%), neutral pH (6.7 ± 0.2), very low C-Organic (0.99 ± 0.07%) and total N (0.07 ± 0.01%), high available P (28.64 ± 2.22 mg/kg) and exchangeable K (0.94 cmol(+)/kg), and moderately high EC (3.9 dS/m). These findings indicate that petroleum operational activities have caused soil quality degradation, particularly through soil compaction and reduction in organic matter content. Appropriate soil management interventions, including organic matter addition, traffic management, and contamination remediation, are essential to restore and maintain soil quality in petroleum operational areas.
Quality Assessment of Arabica and Robusta Coffee Under Different Post-Harvest Processing Methods Using Solar Dryer Technology Fanesa, Anggia; Maryanti, Maryanti; Fahmi, Putri Mariska Fahmi
Agricultural Science Vol. 9 No. 2 (2026): March In Progress
Publisher : Faculty of Agriculture, Merdeka University Surabaya, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55173/agriscience.v9i2.192

Abstract

Post-harvest processing methods significantly influence coffee quality, yet traditional sun-drying techniques require 15-17 days and often result in inconsistent quality, particularly during rainy seasons. This study investigated the effects of four post-harvest processing methods (Natural, Full Wash, Semi Wash, and Honey) on quality characteristics of Arabica Sigararutang and Robusta Toraja coffee varieties using solar dryer dome technology. The research employed a factorial design with five replications for each treatment combination, resulting in 40 experimental plots. Coffee cherries were harvested from West Sumatra plantations at elevations of 1050-1150 masl for Arabica and 780-900 masl for Robusta. Quality assessment encompassed physical parameters (fresh weight, drying duration, color changes, dry weight, and yield), chemical parameters (moisture content, caffeine content, and pH level), and sensory parameters (color intensity, aroma, and overall acceptance) evaluated by certified panelists using 1-7 scoring scales. Results demonstrated that the Honey process yielded superior overall quality for both varieties, achieving highest sensory scores for color (5.30-5.35), aroma (5.36-6.21), and overall acceptance (3.81-4.64). The Semi Wash process exhibited the most efficient drying performance, requiring only 22.7-24.6 days compared to 33.4-32.9 days for Natural process. All treatments successfully achieved optimal moisture content (11.3-12.3%) using solar dryer dome technology. Arabica beans demonstrated higher fresh weight and caffeine content than Robusta across all processing methods. The Honey processing method combined with solar dryer dome technology represents an optimal approach for enhancing coffee quality and market competitiveness in small and medium-scale enterprises.
Growth Response of Robusta Coffee (Coffea canephora) Cuttings to Arbuscular Mycorrhizal Fungi Dosage Application in Ultisol Husna; Luthfi, Hafiz; Sari, Sismita; Zuhdi, AH. Maftuh Hafidh
Agricultural Science Vol. 9 No. 2 (2026): March In Progress
Publisher : Faculty of Agriculture, Merdeka University Surabaya, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55173/agriscience.v9i2.193

Abstract

Coffee production in Lampung Province faces significant challenges due to the dominance of Ultisol soils characterized by low fertility, high acidity, and phosphorus fixation. This study aimed to determine the optimal dosage of arbuscular mycorrhizal fungi (AMF) inoculum to enhance the growth of robusta coffee (Coffea canephora) cuttings in Ultisol growing media. The experiment was conducted at the State Polytechnic of Lampung from August to October 2025 using a Randomized Complete Block Design (RCBD) with four treatments: M0 (control without mycorrhizal), M1 (10 g mycorrhizal inoculum per plant), M2 (20 g per plant), and M3 (30 g per plant). Each treatment was replicated four times with three plants per experimental unit. Growth parameters measured included leaf number, plant height, and root volume at 0, 3, 9, and 12 weeks after transplanting. Results showed that the M1 treatment consistently produced superior growth performance across all parameters. At 12 weeks after transplanting, M1 achieved 21.44 leaves (53.1% increase), 38.69 cm plant height (48.7% increase), and 44.67 cm³ root volume (108.3% increase) compared to the control. Higher dosages (M2 and M3) showed diminishing returns, indicating excessive inoculum application may cause unfavorable carbon allocation dynamics. This study concludes that 10 g mycorrhizal inoculum per plant is the optimal dosage for enhancing robusta coffee cutting growth in Ultisol nursery systems.
Effectiveness of Insecticide–Surfactant Combinations Against Thrips palmi on Eggplant Lida Nurochmatusadiah; Anwar Fadlullah; Deden
Agricultural Science Vol. 9 No. 2 (2026): March In Progress
Publisher : Faculty of Agriculture, Merdeka University Surabaya, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55173/agriscience.v9i2.194

Abstract

Eggplant (Solanum melongena L.) is an important horticultural crop in Indonesia; however, its productivity is frequently constrained by thrips infestation (Thrips palmi). This study aimed to evaluate the effectiveness of combinations of insecticide active ingredients and Ronstick surfactant in reducing the intensity of T. palmi attacks on eggplant plants. The research was conducted in Ender Village, Pangenan District, Cirebon Regency, from May to August 2025 using a Randomized Block Design with seven treatments and three replications. Treatments consisted of abamectin, dinotefuran, and their combinations, each applied with Ronstick surfactant at concentrations of 1–2 ml/L, and a control without insecticide. The results showed that insecticide–surfactant combinations significantly reduced thrips population and attack intensity compared to the control. The combination of abamectin + dinotefuran with surfactant at 2 ml/L was the most effective treatment. These findings indicate that appropriate insecticide–surfactant combinations can enhance thrips control efficiency while supporting more rational insecticide use.
The Effect of Controlled Release Fertilizer On The Growth of Oil Palm (Elaeis Guineensis Jacq.) Seedlings In The Pre-Nursery Bela Ayu Pratiwi; Adi Noor Prayogi; Bambang Utoyo; AH. Maftuh Hafidh Zuhdi; Husna
Agricultural Science Vol. 9 No. 2 (2026): March In Progress
Publisher : Faculty of Agriculture, Merdeka University Surabaya, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55173/agriscience.v9i2.195

Abstract

Improving oil palm production can be achieved through better cultivation management, including proper nursery practices. The quality of seedlings at the early growth stage plays a crucial role in determining field performance, making efficient fertilization essential from the pre-nursery phase. One of the fertilization technologies developed to improve nutrient uptake efficiency is the application of Controlled Release Fertilizer (CRF). This study aimed to evaluate the effect of CRF compared with conventional NPK fertilizer on the growth of oil palm seedlings. The experiment was conducted for three months using a Completely Randomized Design (CRD) with four treatments: no fertilizer (P0), NPK (P1), NPK + CRF (P2), and CRF (P3). Data were analyzed using ANOVA at a 5% significance level, followed by the LSD test when significant differences were detected. The results showed that treatments P2, P3, and P4 produced better growth responses than the control in all observed parameters, including plant height, number of leaves, leaf greenness, stem diameter, and leaf area. Fertilizer application significantly improved seedling growth, while CRF, either applied alone or in combination with NPK, produced growth responses comparable to conventional fertilization. These findings indicate that CRF has the potential to be used as an effective fertilization alternative to support oil palm seedling growth in the pre-nursery.  
Comparative Income Analysis of Partner and Non-Partner Shallot Farmers in Cirebon Rifyal Zaelva Gustinar; Dina Dwirayani; Tety Suciaty
Agricultural Science Vol. 9 No. 2 (2026): March In Progress
Publisher : Faculty of Agriculture, Merdeka University Surabaya, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55173/agriscience.v9i2.196

Abstract

Reality shows that there is an income gap between farmers partnered with PT Tani Bawang Sejahtera and non-partner farmers, even though ideally partnerships should be able to promote equitable profits. This study aims to: 1) analyze the partnership pattern between PT Tani Bawang Sejahtera and its partner farmers; and 2) analyze the income differences between PT Tani Bawang Sejahtera partner farmers and non-partner farmers. This research was conducted in Babakan Subdistrict, Cirebon Regency, with the research process taking place from October 2025 to January 2026. The research design is considered a comparative quantitative study with a survey research technique. The population of this study consists of red onion farmers who are both partners and non-partners. Data analysis was conducted using a two-sample independent mean difference test (independent sample t-test). The study results showed that partner farmers had an average production cost of IDR. 175,610,184, revenue of IDR. 445,726,071, and income of IDR. 270,115,887, while non-partner farmers had a production cost of IDR. 174,596,638, revenue of IDR. 292,063,141, and income of IDR. 117,466,503. Based on the difference test analysis using the independent sample t-test, the significance was found to be 0.000 and the mean difference was positive, indicating a difference between the incomes of partner and non-partner farmers, with partner farmers having a higher average income.

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