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All Journal Proceedings of Annual International Conference Syiah Kuala University - Life Sciences & Engineering Chapter Agrotekma: Jurnal Agroteknologi dan Ilmu Pertanian JURNAL PENDIDIKAN TAMBUSAI Jurnal Darma Agung Majalah Ilmiah METHODA
Bilter Sirait
Universitas Methodist Indonesia
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Pengaruh Aplikasi Pupuk Kandang Sapi dan ZA terhadap Pertumbuhan serta Hasil Bawang Merah (Allium ascalonicum L.) pada Ultisol Jaramel Hotmatuah Purba; Agnes Imelda Manurung; Bilter Sirait
Majalah Ilmiah METHODA Vol. 15 No. 3 (2025): Majalah Ilmiah METHODA
Publisher : Universitas Methodist Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.46880/methoda.Vol15No3.pp239-247

Abstract

This study aimed to evaluate the effect of cattle manure and ZA fertilizer on the growth and yield of shallots (Allium ascalonicum L.) cultivated on Ultisol soil. The experiment was conducted in Medan Selayang, from January to April 2024, using a two-factor Randomized Block Design (RBD) with three levels of cattle manure and four levels of ZA fertilizer. Data were analyzed using analysis of variance followed by Duncan’s multiple range test. The results showed that cattle manure at a dose of 30 g per polybag significantly increased fresh bulb weight per plot, but had no significant effect on plant height, leaf number, other bulb yield parameters measured. ZA fertilizer significantly affected leaf number and stored bulb weight per plot, but showed no significant influence on other growth and yield traits. The interaction between cattle manure and ZA fertilizer showed no significant effect on all observed parameters.
Evaluasi Kesesuaian Lahan untuk Pengembangan Cabai Merah (Capsicum annuum L.) pada Lahan Pasca Vulkanik Gunung Sinabung di Kecamatan Naman Teran, Kabupaten Karo Bilter Sirait; Ebsan M. Sianipar; Roni Martin
Majalah Ilmiah METHODA Vol. 16 No. 1 (2026): Majalah Ilmiah METHODA
Publisher : Universitas Methodist Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.46880/methoda.Vol16No1.pp9-14

Abstract

This study aimed to evaluate the level of land suitability for red chili pepper (Capsicum annuum L.) cultivation on land affected by the eruption of Mount Sinabung in Naman Teran District, Karo Regency. The study was conducted from December 2025 to February 2026 using a survey method with a spatial and descriptive analysis approach. The overlay of soil type, elevation, and slope gradient maps resulted in 13 Land Map Units (LMUs). However, eruption-affected areas were identified in two villages within specific LMUs. Land suitability evaluation was carried out using a matching method between land characteristics and crop suitability criteria. The results showed that the LMU in Sigarang-garang Village was classified as unsuitable (N), with nutrient retention and erosion hazard as the main limiting factors. Similarly, the LMU in Sukanalu Village was also classified as unsuitable (N), with comparable limitations. Some parameters, such as soil pH, can be improved through liming; however, nutrient retention remains a major constraint that is difficult to significantly improve.
GIS-Based Evaluation of Actual and Potential Land Suitability for Potato (Solanum tuberosum L.) Cultivation in the Post-Eruption Landscape of Mount Sinabung, Indonesia Bilter Sirait; Chichi Josephine Manalu; Arivin Putra Harefa
Majalah Ilmiah METHODA Vol. 16 No. 2 (2026): Majalah Ilmiah METHODA
Publisher : Universitas Methodist Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.46880/methoda.Vol16No2.pp253-260

Abstract

Potato (Solanum tuberosum L.) is a high-value horticultural crop whose productivity depends strongly on land suitability, particularly in volcanic regions where repeated eruptions alter soil properties and landscape characteristics. Evaluating land suitability is therefore essential for identifying cultivation constraints and developing sustainable land management strategies. This study assessed the actual and potential land suitability for potato cultivation in the post-eruption area of Mount Sinabung, North Sumatra, Indonesia, using a Geographic Information System (GIS)-based land evaluation approach integrated with the FAO matching framework. Land Mapping Units (LMUs) were delineated through the overlay of soil type, elevation, and slope maps, followed by field surveys and laboratory analyses of soil physical and chemical properties. Thirteen LMUs were identified, with LMU 1 (Sigarang-garang Village) and LMU 2 (Sukanalu Village) representing the eruption-affected agricultural areas. Under current conditions, LMU 1 was classified as Not Suitable (N) because of severe erosion hazards, whereas LMU 2 was classified as Marginally Suitable (S3), primarily constrained by temperature and nutrient retention. Following the implementation of feasible land improvement measures, including soil conservation, liming, and organic matter application, the potential suitability of LMU 1 improved to S3, while LMU 2 remained S3 due to persistent climatic and land preparation constraints. The findings indicate that erosion hazard and nutrient retention are manageable limiting factors, whereas temperature and topographic conditions remain relatively permanent constraints. This study demonstrates the value of integrating GIS, field observations, laboratory analyses, and FAO land evaluation for supporting evidence-based agricultural planning and sustainable potato production in volcanic post-eruption landscapes.
Co-Authors Agnes I. Manurung Agnes Imelda Manurung Agnes Imelda Manurung Agnes Imelda Manurung Arivin Putra Harefa Bondar, Benito Charloq Chichi Josephine Manalu Culina Siringo-ringo Ebsan M. Sianipar Eduard Nupuku Erika Pardede Ernitha Panjaitan Herlina Veronika Hulu, Tonasokhi Hutabarat, Samuel Iovie P. Roselyna Jaramel Hotmatuah Purba Jonson Erianto Sitindaon Laia, Sozanolo Marista Siallagan Marpaung, Robbert G Nur Synta Napitupulu Petralius Hulu R. Sabrina Roni Martin Sabrina, R. Satia Negara Lubis Silalahi, Emeraldo Martupa Simatupang, Uli C. Simatupang, Ulina C. Jenni