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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 136 Documents
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Physical Properties and Panelists’ Preference for Purple Sweet Potato Flour Flakes with Okara Flour Substitution Sulthan Haz Syafiq Mubarok; Dwi Agustiyah Rosida; Tiurma Wiliana Susanti Panjaitan
Agricultural Science Vol. 9 No. 1 (2025): September
Publisher : Faculty of Agriculture, Merdeka University Surabaya, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55173/agriscience.v9i1.186

Abstract

Purple sweet potato flour is a promising flake component due to its elevated carbohydrate and antioxidant levels. Nonetheless, its very low protein content requires the incorporation of supplementary ingredients, such as okara flour, which is abundant in protein and fiber, to enhance the nutritional profile of the final product. This study investigates the impact of replacing purple sweet potato flour with okara flour on flakes' physical properties (texture and rehydration capacity) and sensory acceptance (organoleptic qualities). A one-factor Completely Randomized Design (CRD) was employed with five replacement levels: P0 (100%:0%), P1 (90%:10%), P2 (80%:20%), P3 (70%:30%), and P4 (60%:40%). The results showed that the substitution markedly influenced texture (p = 0.016) and rehydration capacity (p = 0.000), with increased okara levels resulting in firmer flakes and enhanced rehydration. Substitution markedly affected panelists' preferences for taste (p = 0.000), texture (p = 0.000), and color (p = 0.025), but not scent (p = 0.725). Elevating okara levels often diminished preference for flavor and texture, although color was favored at elevated okara concentrations. The optimal formulation was achieved with a 20% replacement of okara.
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.

Page 14 of 14 | Total Record : 136

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