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Kota manado,
Sulawesi utara
INDONESIA
EUGENIA
Published by Universitas Sam Ratulangi
ISSN : -     EISSN : -     DOI : -
Core Subject : Agriculture,
Agriculture, Biological Sciences & Forestry
The aims of this journal is to provide a venue for academicians, researchers and practitioners for publishing the original research articles or review articles. The scope of the articles published in this journal deal with a broad range of topics, including: Agronomi, Protection, Soil, Forestry, Agroecotecnology.
Arjuna Subject : -
Articles 225 Documents
 19   20   21   22   23 
PENGEMBANGAN INSTRUMEN PENGUKURAN SUHU & KELEMBABAN PADA JAGUNG DENGAN MEMANFAATKAN IoT (Internet of Things) DI TOMOHON: Development of Measurement Instrument For Temperature & Humidity In Corn Utilizing The Internet of Things (Iot) In Tomohon Karlmax L.M. Pangkey; Adeleyda Lumingkewas; Edwin Tenda
EUGENIA Vol. 32 No. 1 (2026): Eugenia
Publisher : Universitas Sam Ratulangi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35791/qzf93c64

Abstract

ABSTRACT The significant decrease in corn production in North Sulawesi Province from 2020 (174 thousand tons) to 2023 (88 thousand tons) indicates critical factors that need to be managed, one of which is the microclimate condition, encompassing air temperature and humidity. Fluctuations in temperature and humidity directly affect transpiration rates, photosynthesis, nutrient uptake, and the risk of pest and disease attacks on corn plants. Therefore, this research aims to develop and implement an IoT-based microclimate measurement instrument as an effort to achieve optimal corn production yields. The research methodology includes the design of a hardware integrated with temperature and humidity sensors and the microcontroller, as well as the design of software for data transmission to a cloud server via internet connection. The collected data is then presented in real-time through sheet. The instrument validation test was conducted by comparing the measurement instrument data against the data from BMKG using the Pearson correlation test (r).Results showed a very strong correlation coefficient: air temperature (r=0.857); air humidity (r=1); and soil moisture (r=0.864). This high correlation value proves that the developed instrument is compliant with the standard. Results show that the IoT-based temperature and humidity measurement instrument was successfully developed. Keywords: Corn, IoT, measurement, air temperature, humidity, Tomohon
KARAKTERISTIK BEBERAPA VARIETAS KANGKUNG DARAT (Ipomoea reptans Poir): Characteristics of Several Varieties of Upland Water Spinach (Ipomoea reptans Poir) Ivana Manopo; Jantje Pongoh; Annatje E B Inkiriwang; Edy Fredy Lengkong; Sesilia Anita Wanget; Langimanapa Sofia Demmassabu
EUGENIA Vol. 32 No. 1 (2026): Eugenia
Publisher : Universitas Sam Ratulangi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35791/07cs7d30

Abstract

ABSTRACT Upland water spinach (Ipomoea reptans, Poir) is a widely consumed leafy vegetable due to its good nutritional content, rapid growth, and ease of cultivation; however, its productivity often varies depending on the characteristics of the varieties used. This study aimed to determine the growth characteristics of five upland water spinach varieties, namely Bisi, Bangkok LP-1, Rajawali, Serimpi, and Bika. The research was conducted in Kalasey Satu Village, Mandolang District, Minahasa Regency from June to July 2025 using a Randomized Block Design (RBD) with five treatments and three replications, totaling 15 experimental units. Observations were carried out at 25, 30, and 35 days after planting (DAP) on plant height, number of leaves, number of branches, stem diameter, and fresh weight. The results showed no significant differences among varieties at 25 and 30 DAP, while significant differences occurred at 35 DAP. The Bika variety exhibited the best growth performance with an average plant height of 49.56 cm, 57.11 leaves, 8.78 branches, 8.52 mm stem diameter, and 48.33 g fresh weight, followed by Serimpi which also showed relatively high vegetative growth. The Bisi variety had a larger stem diameter but lower leaf and branch numbers, while Bangkok LP-1 and Rajawali displayed lower overall growth and yield. Based on these results, the Bika variety is recommended for cultivation due to its superior growth characteristics, and further studies are suggested to evaluate nutritional quality and determine optimal harvest timing to ensure both high yield and desirable consumption quality. Keywords: land spinach, varieties, characteristics, water, horticulture
PENGARUH PEMBERIAN PUPUK ORGANIK CAIR DAUN GAMAL (Gliricidia sepium (Jacq.) Steud.) Terhadap Pertumbuhan Tanaman Selada (Lactuca sativa L.): The Effect of Applying Liquid Organic Fertilizer from Gamal Leaf (Gliricidia sepium (Jacq.) Steud.) on the Growth of Lettuce Plants (Lactuca sativa L.) Novanly Aseng; Adeleyda M.W Lumingkewas; Jackson Fraky Watung
EUGENIA Vol. 32 No. 1 (2026): Eugenia
Publisher : Universitas Sam Ratulangi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35791/7jgd0p60

Abstract

ABSTRACT Lettuce (Lactuca sativa L.) Green and red lettuce plants generally have similar leaf characteristics and textures, namely serrated or curly edges. The most common type of lettuce consumed by the public is the leaf lettuce type (green and red). The low production of lettuce plants is partly caused by decreasing soil fertility due to the lack of innovation in cultivation, especially the use of liquid organic fertilizers. This study aims to determine the effect of providing liquid organic fertilizers of gamal leaves (Gliricidia sepium (Jacq.) Steud.) on the growth of lettuce plants (Lactuca sativa L.). This study used a completely randomized design. The parameters observed were plant height, number of leaves, and fresh weight of plants. The treatments given included P0: (Control), P1: 30 ml of gamal leaf POC/liter of water, P2: 60 ml of gamal leaf POC/liter of water, P3: 90 ml of gamal leaf POC/liter of water, P4: 130 ml of gamal leaf POC/liter of water. The study took place from July – November 2025. The application of gamal leaf POC significantly affected plant height, number of leaves, and fresh weight on lettuce (Lactuca sativa L.) growth. The best concentration was treatment P4 (130 ml gamal leaf POC/liter of water) which produced a plant height of 30.78 cm at 42 HST, 14.8 leaves at 42 HST, and the highest fresh weight of 92.8 grams. Keywords: Lettuce, Gamal, liquid organic fertilizer, concentration, yield
PENGARUH PEMBERIAN PUPUK ORGANIK CAIR (POC) REBUNG BAMBU TERHADAP PERTUMBUHAN TANAMAN SAWI HIJAU: The Effect of Applying Liquid Organic Fertilizer (POC) from Bamboo Shoots on The Growth of Green Mustard Plants Mulya Dwiyanti; Diane D. Pioh; Deffly A.S. Turang; Sandra E. Pakasi; Wiesje J.N. Kumolontang; Jemmy Najoan
EUGENIA Vol. 32 No. 2 (2026): Eugenia
Publisher : Universitas Sam Ratulangi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35791/9zcwps18

Abstract

Mustard greens are a vegetable that thrives in soil rich in organic matter and sufficient moisture. Fertilization is essential for mustard greens. Bamboo shoots are a vegetable that can be used as a raw material for organic fertilizer. Liquid organic fertilizer from bamboo shoots contains gibberellins and a high organic carbon content, which can stimulate plant growth. This study aimed to determine the effect of applying liquid organic fertilizer (POC) from bamboo shoots on the growth of mustard greens. This research was conducted at the green house of the Faculty of Agriculture, Sam Ratulangi University, Manado. The study lasted for two months, from September to October 2025. The design used in this study was a completely randomized design (RAL) consisting of five treatments and four replications, resulting in 20 experimental units. The treatments given included P0: (Control), P1: (100 ml POC + 1 L water), P2: (200 ml POC + 1 L water), P3: (300 ml POC + 1 L water), P4: (400 ml POC + 1 L water). The results obtained from the administration of bamboo shoot POC significantly affected the growth of green mustard greens from plant height, number of leaves, fresh weight, root weight. The right POC concentration was shown in the P1 treatment (100 ml POC + 1 L water) with a plant height of 31.7 cm, number of leaves 14.75 strands, fresh weight 60.25 grams, and root weight 5.75 grams. Keywords: bamboo shoot, growth, liquid organic fertilizer, mustard greens, yield
ANALISIS KUALITAS AIR BENDUNGAN RANOLANGSOT DI KABUPATEN MINAHASA SELATAN SEBAGAI SUMBER AIR IRIGASI PERSAWAHAN: Analysis of Water Quality in Ranolangsot Dam in South Minahasa Regency as a Source of Irrigation for Rice Fields Julio K Repi; Jelie V. Porong; Sofia Wantasen
EUGENIA Vol. 32 No. 1 (2026): Eugenia
Publisher : Universitas Sam Ratulangi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35791/0g90kg73

Abstract

ABSTRACT Determining and Analyzing the Quality of Ranolangsot Dam Water as a Source of Irrigation Water for Rice Fields based on Government Regulation No. 22 of 2021, as well as to Determine the suitability of dam water quality based on the Sodium Adsorption Ratio (SAR) value. The study was conducted in July 2025 using descriptive methods and laboratory analysis with purposive sampling techniques at three sampling points. The parameters tested included temperature, pH, Total Suspended Solids (TSS), Nitrate, Phosphate, Sodium, Calcium, and Magnesium. The SAR value was calculated using the Ayers & Westcott (1985) formula to determine water quality classification. The analysis results showed that the physical and chemical parameters of temperature 30°C, pH 6.5, TSS 6–10 mg/l, nitrate 0.8–2 mg/l, phosphate 0.02–0.3 mg/l still met the class III–IV quality standards. However, the SAR values at three consecutive points were 34.31, 13.25, and 30.83 mEq/l, indicating water quality ranging from (poor) to (good). The high sodium dominance at several points indicates the potential for soil structure degradation and reduced land fertility if used for irrigation. In conclusion, although most of the Ranolangsot Dam water parameters meet quality standards, the high SAR values at two points indicate that the water is not yet fully suitable for rice field irrigation without further management. Keywords: water quality, Ranolangsot Dam, irrigation, Sodium Adsorption Ratio (SAR), water quality standards
PENGARUH MEDIA TANAM TERHADAP PERTUMBUHAN DAN HASIL TANAMAN SAWI HIJAU (Brassica juncea L.): The Effect of Growing Media on The Growth and Yield of Mustard Greens (Brassica juncea L.) Angelica Sono; Langimanapa Sofia Demmassabu; Pemmy Tumewu; Jantje Pongoh; Jeanne Martje Paulus; Stella Maria Theresia Tulung
EUGENIA Vol. 32 No. 2 (2026): Eugenia
Publisher : Universitas Sam Ratulangi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35791/ffjszn09

Abstract

Growing media are one of the main components in plant cultivation, both conventional and modern, functioning as a medium for root growth and development, as well as providing nutrients, water, and air required for plant metabolism. This study aimed to determine the effect of growing media and to identify the best growing medium for the growth and yield of green mustard (Brassica juncea L.). This study was conducted in Kakaskasen Dua Village, North Tomohon District, Tomohon City, at an altitude of 800 meters above sea level. The research was carried out from October to December 2025 with a single-factor Completely Randomized Design (CRD) with five growing media treatments, namely soil (M0), soil : chicken manure (1:1) (M1), soil : chicken manure : rice husk charcoal (2:2:1) (M2), soil : rice husk charcoal (1:1) (M3), and soil : chicken manure : rice husk : rice husk charcoal (1:1:1:1) (M4), each replicated five times. The observed variables included plant height, number of leaves, and fresh weight of the plant. Data were analyzed using analysis of variance (ANOVA), followed by the Least Significant Difference (LSD) test at the 5% level. The results showed that treatment M2 produced the best growth (plant height of 44.72 cm and number of leaves of 16.60) as well as the highest fresh weight yield of green mustard. Keywords: growing media, growth, mustard greens, rice husk charcoal, yield
ANALISIS NPK DAN pH PUPUK ORGANIK CAIR (POC) LIMBAH KULIT PISANG GOROHO (Musa acuminafe L.) DI DESA PULISAN KABUPATEN MINAHASA UTARA: Analysis of NPK and pH of Liquid Organic Fertilizer from Goroho Banana Peel Waste (Musa acuminafe L.) in Pulisan Village North Minahasa Regency Asti Pretti Sinta Sinaga; Jemmy Najoan; Selvie Tumbelaka; Adeleyda M.W. Lumingkewas; Deflly A.S. Turang; Sofia Wantasen
EUGENIA Vol. 32 No. 2 (2026): Eugenia
Publisher : Universitas Sam Ratulangi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35791/9mnwad47

Abstract

This study aims to analyze N, P, K, and pH contained in liquid organic fertilizer from goroho banana peel waste (Musa acuminafe L.) in Pulisan Village North Minahasa Regency. This study was conducted from September to November 2025 in Pulisan Village and the Manado Center for Standardization and Industrial Services. The method used was a descriptive method with fermentation for 13 days using two different concentrations of EM4 (Effective Microorganisms), namely 130 ml and 195 ml, each mixed with 500 g of goroho banana peel and 25 ml of stale rice MOL. The parameters observed included N, P, K, and pH content. The analysis results showed the N, P, K, and pH content in the liquid organic fertilizer from goroho banana peel waste (Musa acuminafe L.) in Pulisan Village North Minahasa Regency, at an EM4 concentration of 130 ml, obtained an N content of 0.08%; P <0.01%; K 0.39%; and pH 4.00. Meanwhile, at an EM4 concentration of 195 ml, the content was N 0.13%; P 0.01%; K 0.31%; and pH 3.94. Keywords: banana, goroho, liquid organic fertilizer, peel, waste
PEMANFAATAN TEKNOLOGI DRONE DALAM INVENTARISASI TUTUPAN LAHAN DI DESA TULAP KECAMATAN KOMBI: Utilization of Drone Technology in Land Cover Inventory in Tulap Village, Kombi District Marciano Tambuwun; Sandra E. Pakasi; Jackson Fraky Watung; Jelie Viekson Porong; Melisa Pascawati Todingan; Wawan Nurmawan; Sofia Wantasen
EUGENIA Vol. 32 No. 2 (2026): Eugenia
Publisher : Universitas Sam Ratulangi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35791/gz884e92

Abstract

This study aimed to inventory land cover in the upper Kora-Kora watershed in Tulap Village, Kombi District, using Unmanned Aerial Vehicle (UAV) drone technology. Field data acquisition was conducted using a DJI Mavic 2 Pro drone flown at an altitude of 250 meters, yielding aerial imagery with a very high spatial resolution of 6 cm/pixel. The imagery data was processed using Agisoft Metashape photogrammetry software and analyzed through visual interpretation and manual digitization using ArcGIS 10.8 software. The inventory identified seven land cover classes: plantations covering 27.59 hectares (88.71%), shrubland (1.21 ha), open land (1.10 ha), buildings/settlements (1.04 ha), roads (1,727 m), footpaths (1,178 m), and a river (930 m). The dominance of plantation cover aligns with the primary characteristics of an agrarian village community. The use of drones proved highly efficient, rapid, and accurate in providing up-to-date geospatial data. The resulting map serves as a valuable resource for the village government in spatial planning, natural resource management, and the prioritization of conservation areas. Keywords: drone, inventory, land cover, photogrammetry, sofware
ANALISIS PUPUK ORGANIK CAIR DARI SAMPAH DAUN KETAPANG (Terminalia catappa L.) DI DESA PULISAN KECAMATAN LIKUPANG TIMUR: Analysis of Liquid Organic Fertilizer from Ketapang Leaf Waste (Terminalia catappa L.) in Pulisan Village, East Likupang District Ruhut Marison Purba; Selvie Tumbelaka; Jemmy Najoan; Sofia Wantasen; Adeleyda M.W. Lumingkewas; Melisa Pascawati Todingan
EUGENIA Vol. 32 No. 2 (2026): Eugenia
Publisher : Universitas Sam Ratulangi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35791/pma32n57

Abstract

This study aimed to analyze the nutrient content and pH level of liquid organic fertilizer (POC) derived from ketapang (Terminalia catappa L.) leaf waste in Pulisan Village, East Likupang District. This descriptive study compared the use of dried ketapang leaves (DKK) and fresh ketapang leaves (DKB), fermented for 14 days using a combination of the EM4 bioactivator and a local microorganism (MOL) derived from spoiled rice. Laboratory analysis at BSPJI Manado revealed that both treatments yielded an identical nitrogen (N) content of 0.10%. However, the DKK-based POC exhibited higher potassium (K) content (0.36%) and a more acidic pH (3.51) compared to the DKB-based POC (K: 0.18%; pH: 4.38). Conversely, the phosphorus (P) content in the DKB-based POC (0.03%) was higher than that in the DKK-based POC (<0.01%). Physically, the fermentation process altered the solution's color from brick red to black for DKK and to dark brown for DKB. Although the NPK nutrient levels remain below quality standards, this POC still holds potential for sustainably enhancing soil fertility. Keywords: combination, ketapang, leaf, liquid organic fertilizer, spoiled rice
PENGARUH PEMBERIAN PGPR (PLANT GROWTH PROMOTING RHIZOBACTERIA) TERHADAP PERTUMBUHAN DAN HASIL TANAMAN BAYAM BATIK (Amaranthus tricolor L.): The Effect of PGPR (Plant Growth Promoting Rhizobacteria) Administration on The Growth and Yield of Batik Spinach (Amaranthus tricolor L.) Melyani Laumba; Diane D. Pioh; Arthur G. Pinaria; Selvie Tumbelaka; Jackson F. Watung; Melisa Pascawati Todingan
EUGENIA Vol. 32 No. 2 (2026): Eugenia
Publisher : Universitas Sam Ratulangi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35791/g7g8d134

Abstract

Spinach is a type of leafy vegetable that has high nutritional value and is widely consumed by the community as a source of important nutrients for the body. In general, spinach is known for its protein, vitamins A and C, and B vitamins, and also contains mineral salts such as calcium (Ca), phosphorus (P), and iron (Fe). Batik spinach (Amaranthus tricolor L.) is a plant that belongs to the Amaranthaceae family and originates from North Amerika. PGPR (Plant Growth Promoting Rhizobacteria) are a group of beneficial bacteria that live in the root zone (rhizosphere) and play an important role in enhancing plant growth and productivity.This study aimed to determine the effect of PGPR application on the growth and yield of batik spinach (Amaranthus tricolor L.) and to find optimal concentration of PGPR. The study wa conducted in the greenhouse of the Faculty of Agriculture, Sam Ratulangi University, Manado, in June to July 2025, using a completely randomaized design (CRD) with 5 treatments and 4 replications (20 plants). The treatments were plant height, number o leaves, fresh weight, and root weight. The results showed that PGPR treatment affected the growth of batik spinach, with the optimal concentration being 35 ml/L of water. Keywords: batik spinach, growth, nutritional value, plant growth promoting rhizobacteria, yield

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