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Andalasian International Journal of Agricultural and Natural Sciences
Published by Universitas Andalas
ISSN : 27766500     EISSN : 27457885     DOI : -
Core Subject : Science, Agriculture, Engineering,
Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering
is a peer-reviewed, open-access journal that publishes original research articles, review articles, as well as short communication in all areas of basic and applied natural sciences. The submitted manuscript should have relevance with basic and applied natural science. Andalasian Internasional Journal of Agricultural and Natural Sciences covers the following topics. · Applied biology · Applied chemistry · Applied physic · Agriculture Sciences · Agroindustry · Animal Science · Food science and technology · Environmental · Health and medicine · Agroindustry
Arjuna Subject : Ilmu Pertanian dan Biologi (Semua) - Ilmu Pertanian dan Biologi (Lain-Lain)
Articles 7 Documents
 1 
Search results for , issue "Vol. 6 No. 2 (2025)" : 7 Documents clear
Evaluation of Some Maize Genotype’s Performance and Their Susceptibility to Corn Stem Borer Under the Effect of Potassium Spraying Omar Karim Hassoun; Raeed Mejbel Abdullah; Karim Abdullah Hassan
Andalasian International Journal of Agriculture and Natural Sciences (AIJANS) Vol. 6 No. 2 (2025)
Publisher : Lembaga Penelitian dan Pengabdian, Universitas Andalas

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25077/aijans.v6.i2.61-70.2025

Abstract

This study took a close look at different types of corn plants (Zea mays L.) to see how well they stood up against the corn stem borer, Sesamia cretica. We also explored how applying potassium to the leaves affected their resistance. The experiment happened during the summer growing season of 2024 at the University of Kirkuk's Agricultural Research and Experiment Station. We used a standard experimental setup, repeating our tests three times. We tried three different potassium concentrations (0, 15, and 30 grams per liter) and tested six distinct corn varieties: KONSENS, DKC777, DKC666, AGN720, GAMESON, and GOLDEN. We measured several things: how much the plants got infected, the number of holes, larvae, and tunnels in each plant, and how much of the stem was eaten away. Our statistical analysis showed that both the potassium application and the type of corn plant, as well as their combination, had a big impact on most of the traits we measured. The only exceptions were the infection rate, the number of larvae, and the excavated distance when considering the interaction between the plant type and potassium. Interestingly, the 'GAMESON' corn variety consistently showed the best resistance. It had the lowest infection rate (15.94%), the fewest holes (5.31), larvae (1.51), tunnels (2.18), and the least stem damage (17.36%). Applying potassium at 30 grams per liter also significantly helped, reducing the infection rate to 16.38%, holes to 2.73, tunnels to 2.52, and stem damage to 16.80%. The best results came from combining the 'GAMESON' variety with the 30 gm/L potassium treatment, leading to the absolute minimum number of holes (1.86) and tunnels (1.46). This really highlights how much this combination boosts resistance. Our findings strongly suggest that using resistant corn varieties like 'GAMESON' along with smart potassium fertilization can significantly protect corn crops from the stem borer.
Mathematical Modeling and Simulation of Multi-Stage Service Systems with Feedback, Group Service, and Prioritization Malika B. Mirzaeva
Andalasian International Journal of Agriculture and Natural Sciences (AIJANS) Vol. 6 No. 2 (2025)
Publisher : Lembaga Penelitian dan Pengabdian, Universitas Andalas

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25077/aijans.v6.i2.45-51.2025

Abstract

This study aims to analyze the mediation effect of land area on the relationship between price and productivity on oil palm farmers’ income in Bangko Pusako District, Rokan Hilir Regency. A quantitative approach using Structural Equation Modeling-Partial Least Squares (SEM-PLS) method was employed to analyze data from 155 oil palm farmers selected through accidental sampling technique. The results show that palm oil prices and productivity do not have significant direct effects on farmers’ income. However, land area proves to have a significant direct effect on farmers’ income (T-statistic = 2.208, p-value = 0.028). Mediation analysis reveals that palm oil prices significantly affect income through land area mediation (T-statistic = 2.112, p-value = 0.035), while productivity does not significantly affect income through land area mediation (T-statistic = 1.611, p-value = 0.108). These findings confirm the important role of economies of scale in oil palm farming, where farmers with large land areas have comparative advantages in utilizing market price fluctuations. This research provides theoretical contributions to the development of farmer income analysis models and practical inputs for formulating more effective and targeted oil palm farmer empowerment policies.
Effect of Glutamic Acid Foliar Application Concentrations on Growth and Yield Traits of Two Genotypes of Roselle (Hibiscus Sabdariffa L.) Yaseen Obaid Noori Ahmed Sharif; Satar Abid Khaleefh; Sura Hameed Bahar AL-Janabi; Hiba jomaa Alfahdawi; Tariq Raad Thaer Al-Mafarji
Andalasian International Journal of Agriculture and Natural Sciences (AIJANS) Vol. 6 No. 2 (2025)
Publisher : Lembaga Penelitian dan Pengabdian, Universitas Andalas

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25077/aijans.v6.i2.52-60.2025

Abstract

A field experiment was conducted during the summer season of 2024 in the fields of a farmer in the Koldara area, affiliated with Altun Kupri sub-district in Dibis district, located in northern Kirkuk Governorate (35o44'45.5"E, 44°07'21.5"N), approximately 23 km north of Kirkuk city. The objective was to evaluate the response of two roselle genotypes—Local Egyptian and Red Heet—to four foliar application concentrations of glutamic acid (0, 50, 100, and 150 mg L-1) on growth and yield traits. Statistical analysis showed the superiority of the Red Heet genotype in all growth and yield parameters. Foliar application of glutamic acid at 150 mg L-1 significantly enhanced most studied traits. The interaction of Red Heet with 150 mg L-1 gave the best results in terms of number of branches (32.95 branches plant-1), dry weight of sepals leaves (73.28 g), number of capsules (129.95 capsules plant-1), dry weight of capsules (256.77 g), number of seeds per capsule (25.77), and seed yield (949.11 kg ha-1).
Effect of Potassium Fertilization and Chamomile Extract Foliar Spray on Growth and Active Compounds of Portulaca Oleracea L. Grown in Gypsiferous Soil Heba M. M. Al-Hamdany; Ahmed Adnan Mohammed; Suzan D. Hadi; Dalya Ayden Hawar
Andalasian International Journal of Agriculture and Natural Sciences (AIJANS) Vol. 6 No. 2 (2025)
Publisher : Lembaga Penelitian dan Pengabdian, Universitas Andalas

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25077/aijans.v6.i2.71-79.2025

Abstract

The present study was conducted to investigate the effect of potassium fertilization and foliar application of chamomile extract on the growth and active compounds of Portulaca oleracea L. The experiment was carried out at the College of Medicinal and Industrial Plants / University of Kirkuk in the Ronaki area in Kirkuk Governorate using anvils. Four levels of potassium fertilizer (0, 20, 40, 80) kg K ha-1 and three concentrations of chamomile extract (0, 3, 6 g L-1 of water) were used on the growth of the portulaca plant L. oleracea. The variety used in this study is the local variety. The study was carried out with a factorial experiment and a randomized complete block design (R.C.B.D) with three replicates. The results showed that the fertilizer level of 40 kg K ha-1 was significantly superior to the rest of the levels in giving the highest plant height, number of leaves, leaf area, and other studied traits. The results also showed that the concentration (6 g L-1) of chamomile led to a significant increase in all growth characteristics of the barberry plant, while the interaction between potassium fertilization and spraying with chamomile extract had a significant effect at the combination (40 kg K ha-1 + 6 g chamomile L-1 of water) on all the studied traits.
Economic Analysis for Achieving Allocative-Technical Efficiency in Sustainable Agricultural Projects (Calf Fattening Farm as A Model) Abbas Abd Ahmed Al-Tamimi; Dawood Fahad Abdullah
Andalasian International Journal of Agriculture and Natural Sciences (AIJANS) Vol. 6 No. 2 (2025)
Publisher : Lembaga Penelitian dan Pengabdian, Universitas Andalas

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25077/aijans.v6.i2.88-100.2025

Abstract

Livestock production projects are environmentally friendly, as they provide farmers with organic fertilizers and year-round job opportunities. This helps reduce the use of chemical fertilizers, thereby simultaneously achieving the goal of environmental improvement and poverty reduction. This research conducted an economic analysis of a calf fattening farm in Diyala Province for 2024. The research adopted a quantitative economic analysis methodology using a multivariate production function in the double logarithmic form. The research aimed to conduct a quantitative economic analysis to determine the optimal combination of production resources to achieve optimal production. Based on the prices of production resources, the cost equation was formulated, and then the Lagrange multiplier method was used to create the objective function. The optimal production reached (827) K.g/calf, which represents the weight of the calf during the fattening period of (25) weeks. The economic analysis showed that the elasticity of production resources was less than one, which means that the production process is in the second stage of the law of diminishing returns, where technical efficiency is achieved. Through the analysis of the allocative efficiency of production resources, it became clear that there is an inefficient use of dry fodder and green fodder, as the elasticity of these two resources was greater than one, and less than one for the other resources. The study recommended increasing the effective role of agricultural extension to educate calf farmers on the application of scientific research findings to achieve optimal production levels. It also recommended In addition to supporting fodder.
A Field Study of the Job Stress Faced by Agricultural Employees in the Kirkuk Agriculture Directorate, Iraq Ekhlas Thaer Mahmood; Ahmed Thwaini Hdoom Al-Salhi; Mahdi Najm Rakhit; Amal Najim Hasan
Andalasian International Journal of Agriculture and Natural Sciences (AIJANS) Vol. 6 No. 2 (2025)
Publisher : Lembaga Penelitian dan Pengabdian, Universitas Andalas

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25077/aijans.v6.i2.80-87.2025

Abstract

The study aimed primarily to identify the job stress facing agricultural employees in Kirkuk Agriculture Directorate and determine the descending order of each area of study, This was achieved by using a data collection form that included three main areas of job stress: (personal stress, administrative stress, and organizational stress) , The research population consisted of all agricultural employees, totaling (600) agricultural employees in Kirkuk Agriculture Directorate, A random sample of (18%) was taken, comprising (108) agricultural employees ,The research results concluded that organizational stress ranked first in terms of importance, with a weighted mean of (3.41) and a percentage weight of (68.2%), followed by personal stress (3.11, 62.2%), and then administrative stress (3.06, 61.2%). The most prominent sources of stress were: role ambiguity, poor appreciation, lack of professional development opportunities, unfair wages, and high expectations without the necessary resources, Furthermore, continuous exposure to these stress may weaken an employee’s ability to make sound decisions, innovate, and adhere to agricultural quality and safety standards. The study recommends implementing targeted training programs, improving administrative support systems, enhancing communication between leadership and employees, and creating a stimulating and supportive work environment, these steps are essential to ensuring the sustainability and competitiveness of the agricultural sector by maintaining the mental health and professional competence of its workers.
Beyond the Metropolis: Drivers of Online Food Delivery Adoption Ikhwan Arief; Armijal Armijal; Ridhamelia Ridhamelia
Andalasian International Journal of Agriculture and Natural Sciences (AIJANS) Vol. 6 No. 2 (2025)
Publisher : Lembaga Penelitian dan Pengabdian, Universitas Andalas

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25077/aijans.v6.i2.101-109.2025

Abstract

This study investigates the determinants of purchase intention for Online Food Delivery (OFD) services among Generation Z and Millennial consumers in a non-metropolitan city within an emerging market, using ShopeeFood in Padang, Indonesia, as a case study. The rapid saturation of OFD services necessitates a re-evaluation of classical technology adoption models. This research employs an extended Technology Acceptance Model (TAM) framework, integrating digital marketing as a key antecedent. Utilizing a quantitative survey methodology with a sample of 102 consumers, the data were analyzed using Partial Least Squares Structural Equation Modeling (PLS-SEM). The findings reveal that Perceived Usefulness (B=0.584, p<0.001) and Digital Marketing (B=0.262, p<0.05) are significant positive predictors of Purchase Intention. Critically, Perceived Ease of Use (B=0.046, p<0.05) was found to have no significant effect. The model collectively explains 56.1% of the variance (R2) in purchase intention, demonstrating substantial predictive power. This study's principal contribution lies in providing empirical evidence that in a maturing digital service market, ease of use may transition from a direct driver of intention to a baseline 'hygiene factor'. Consequently, the core utility of the service and the effectiveness of strategic marketing efforts significantly influence consumer choice. These findings offer crucial implications for OFD platforms seeking to capture market share in the next frontier of digital growth: the emerging economies' secondary and tertiary cities.

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