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Yefta Pamandungan
Program Studi Agronomi, Fakultas Pertanian, Universitas Sam Ratulangi
Agriculture, Biological Sciences & Forestry

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PENGARUH Trichoderma sp. TERHADAP PERTUMBUHAN VEGETATIF TANAMAN KRISAN (Chrysanthemum morifolium R.) VAR. JAYANI Marsela Deana Ratu; Bertje R.A. Sumayku; Ventje Pangemanan; Jantje Pongoh; Antje Grace Tulungen; Yefta Pamandungan
EUGENIA Vol. 30 No. 1 (2024): Eugenia
Publisher : Universitas Sam Ratulangi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35791/eug.v30i1.57414

Abstract

Chrysanthemum (Chrysanthemum morifolium) is the most popular plant in Indonesia, because chrysanthemum flowers have their own advantages in terms of the beauty of their flower colors. The problem with chrysanthemum shoot cuttings is that the roots are not dense enough so that the chrysanthemum plant cannot grow upright. This research aims to determine the effect of Trichoderma sp. on vegetative growth of chrysanthemum plants. This research was carried out for 5 weeks, starting from July to August 2023 at the Green House of the Seed, Nursery and Agrotourism Center, Tomohon City. The method that will be used in this research is a Completely Randomized Design (CRD), with 5 treatments: P0 = No Trichoderma sp. (Control), P1 = Thricoderma sp. 25 gr/l, P2 = Thricoderma sp. 50 gr/l, P3 = Thricoderma sp. 75 gr/l, P4 = Thricoderma sp. 100 gr/l. All treatments were repeated 5 times so that there were 25 units. The data obtained based on observations in this research will be analyzed using Analysis of Variance (ANOVA). The variables observed were: number of leaves, plant height, number of roots, root length. The results of the study showed that the use of Trichoderma was not significantly different from the variables number of leaves, plant height and root length. Giving trichoderma only had a significant effect on the number of roots (giving 50g trichoderma/liter of water). Keywords: trichoderma sp., chrysanthemum cuttings, growth, results
PENGARUH PEMBERIAN PUPUK ORGANIK CAIR (POC) AIR KELAPA TERHADAP PERTUMBUHAN DAN HASIL TANAMAN PAKCOY (Brassica rapa L.): The Effect of Coconut Water Liquid Organic Fertilizer (POC) on the Growth and Yield of Pakcoy (Brassica rapa L.) Rian Yehezkiel Daud Lintong; Jeanne Martje Paulus; Saartje Sompotan; Johannes Elie Xaveriano Rogi; Sesilia Anita Wanget; Meity Rosadelly Rantung; Yefta Pamandungan
EUGENIA Vol. 31 No. 3 (2025): Eugenia
Publisher : Universitas Sam Ratulangi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35791/kfgqx213

Abstract

Efforts to increase the growth and yield of pak choy (Brassica rapa L.) plants can be done through organic fertilization, one of which is by using coconut water-based POC. This study aims to determine the effect of coconut water POC on the growth and yield of pak choy plants. This study lasted for 2 months from February to April 2025. This study was conducted at the Green House, Faculty of Agriculture, Sam Ratulangi University Manado, using a Completely Randomized Design (CRD) method with 5 treatments, namely, P₀ Control (without POC), P₁ (POC 20 ml/L water), P₂ (POC 40 ml/L water), P₃ (POC 60 ml/L water) and P₄ (POC 80 ml/L water). Each treatment was repeated 3 times so that there were 15 experimental units with each experimental unit consisting of 3 plants so that a total of 45 plants with the observed variables were plant height, number of leaves, fresh weight and root weight. Data were analyzed using ANOVA and continued with the LSD test at the 5% level with the help of Minitab software version 21. The results showed that the administration of coconut water POC significantly affected all observation parameters. The P₄ treatment (POC 80 ml/L water) produced the highest values for all parameters.   Keywords: coconut water, liquid organic fertilizer, pakcoy, Plant Growth, Plant Yield
PENGARUH PEMBERIAN PUPUK ANORGANIK DAN MIKROORGANISME LOKAL BUAH TERHADAP HASIL TANAMAN PAKCOY (Brassica rapa subsp. Chinensis) Meryctris; Pemmy Tumewu; Antje Grace Tulungen; Saartje Sompotan; Langimanapa Sofia Demmassabu; Yefta Pamandungan
EUGENIA Vol. 31 No. 2 (2025): Eugenia
Publisher : Universitas Sam Ratulangi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35791/eug.v31i2.65455

Abstract

This study aims to determine the effect of combining Fruit-Based Local Microorganisms fertilizer with inorganic fertilizer on pakcoy yield, and to identify the most effective combination for enhancing production. The research was conducted from May to June 2025 in Kaskasen II Village, North Tomohon, North Sulawesi, using a Completely Randomized Design with one-factor combinations and six treatments (A: 150 ml/L water, B: 100 kg/ha NPK + 100 kg/ha Urea, C: 50 kg/ha NPK + 50 kg/ha Urea + 150 ml MOL, D: 50 kg/ha NPK + 50 kg/ha Urea + 300 ml MOL, E: 100 kg/ha NPK + 100 kg/ha Urea + 150 ml MOL, F: 100 kg/ha NPK + 100 kg/ha Urea + 300 ml MOL), each with four replications. The observed parameters included plant height, number of leaves, leaf length, leaf width, and fresh weight. The results showed that the combination of inorganic fertilizer and MOL had a significant effect on fresh weight (846.62 g), but no significant effect on plant height, number of leaves, leaf length, or leaf width. Therefore, the combination of inorganic fertilizer and MOL is effective in improving pakcoy yield. Keywords: pakcoy, inorganic fertilizer, local microorganisms
PENGARUH FREKUENSI PEMUPUKAN NPK PADA PERTUMBUHAN DAN PRODUKSI TANAMAN KENTANG (Solanum tuberosum L.) Alen Mintalangi; Edy Lengkong; Stella Maria Theresia Tulung; Maria Goretti Meity Polii; Antje Grace Tulungen; Yefta Pamandungan
EUGENIA Vol. 31 No. 2 (2025): Eugenia
Publisher : Universitas Sam Ratulangi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35791/eug.v31i2.65467

Abstract

Potato (Solanum tuberosum L.) is a major horticultural crop and a key carbohydrate source after rice, maize, and wheat. Its high economic value and suitability for highland cultivation make it an important commodity for food security. This study aimed to evaluate the effect of NPK fertilization frequency on the growth and yield of the Superjohn potato variety. The experiment was conducted at the Experimental Farm of Sam Ratulangi University, Manado, from March to June 2025, using a Randomized Block Design (RBD) with four treatment frequencies: twice, three times, four times, and five times. Each treatment received a total of 15 grams of NPK per plant, applied via watering (kocor) in divided doses. Observed variables included plant height, leaf number, branch number, tuber weight, tuber count, and tuber size classes (SS, S, M, and L). Results showed that fertilization frequency had no statistically significant effect on any of the growth or yield parameters. However, the five-time application treatment (P4) consistently yielded the highest average values numerically across most variables. High rainfall during the study period was suspected to cause nutrient leaching, particularly nitrogen, and waterlogged soil conditions that inhibited root respiration and nutrient uptake. Keywords: Potato, fertilization frequency, yield
PENGARUH PEMBERIAN KOMPOS LIMBAH JAGUNG TERHADAP PERTUMBUHAN DAN HASIL TANAMAN SAWI HIJAU (Brassica juncea L.): The Effect of Corn Waste Compost on the Growth and Yield of Green Mustard (Brassica juncea L.) Rini Audina Berahima; Yefta Pamandungan; Langimanapa Sofia Demmasabu; Sesilia Anita Wanget; Paula Clara Heinny Supit; Antje Grace Tulungen
EUGENIA Vol. 32 No. 1 (2026): Eugenia
Publisher : Universitas Sam Ratulangi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35791/yh0c8364

Abstract

ABSTRACT Mustard greens (Brassica juncea L.) are a popular vegetable among Indonesians. Consumers range from the lower to the upper classes. Demand for mustard greens continues to grow in line with growing demand and public awareness of the nutritional value of vegetables. This study aims to determine the effect of providing corn waste compost on the growth and yield of green mustard plants and to determine the best dose of corn waste compost on the growth and yield of green mustard plants. The study was conducted from July to December 2024 in the Green house of the Faculty of Agriculture, Sam Ratulangi University. The research method used a Randomized Block Design (RAK) with 5 treatment levels and 4 replications, namely: P0: Control / without compost. P1 10 tons / ha) corn waste compost, P2 (20 tons / ha) corn waste compost, P3 (30 tons / ha) corn waste compost, P4 (40 tons / ha) corn waste compost. The results of the study showed that the provision of corn waste compost had a very significant effect on the growth and yield of green mustard plants (Brassica juncea L.). The best results of the provision of corn waste compost fertilizer on green mustard plants (Brassica juncea L.) were obtained in the P4 treatment (40 tons/ha), namely a plant height of 10.15 cm, the number of plant leaves was 17 strands, and produced a wet plant weight of 37.75 gr. Keywords: green mustard, compost, corn waste, production, dosage
RESPON PERTUMBUHAN DAN HASIL TANAMAN PAKCOY (Brassica rapa L.) TERHADAP BEBERAPA JENIS MEDIA TANAM PADA HIDROPONIK SISTEM WICK: Growth and Yield of Pakcoy (Brassica rapa L.) Plants to Several Planting Media in the Hydroponic Wick System. Ir Serly Ivone Kawuwung; Yefta Pamandungan; Saartje Sompotan; Jeanne Martje Paulus; Johannes Elie Xaverino Rogi; Sesilia Anita Wanget
EUGENIA Vol. 32 No. 1 (2026): Eugenia
Publisher : Universitas Sam Ratulangi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35791/8a81n451

Abstract

ABSTRACT Pakcoy (Brassica rapa L.) is a horticultural crop that is highly favored by the public; however,its productivity has declined due to limited land availability. The wick hydroponic system is an efficient alternative cultivation method. This study aimed to determine the effects of different growing media and to identify the best medium for the growth and yield of pakchoi. The research was conducted from May to June 2025 in Kotamobagu, North Sulawesi (789.71 meters above sea level), using a Randomized Block Design (RBD) with four treatments of growing media (rockwool, cocopeat, rice husk charcoal, and compost) and four replications. The observed variables included plant height, number of leaves, leaf length, and fresh weight. The results showed that the growing media treatments had a significant effect on all parameters. Compost medium (P4) produced the best growth and yield response, with a plant height of 23.06 cm, 16.5 leaves, a leaf length of 11.25 cm, and a fresh weight of 53.88 g. In conclusion, compost is the most suitable growing medium for pakchoi cultivation in the wick hydroponic system. Keywords: Pakcoy, hydroponics, wick system, growing media, compost.
Respons Pertumbuhan dan Hasil Tanaman Bayam Merah (Amaranthus tricolor L.) Terhadap Pemberian Pupuk Organik Cair (POC) Air Kelapa dengan Frekuensi Berbeda: Growth Response and Yield of Red Amaranth (Amaranthus tricolor L.) to the Application of Coconut Water-Based Liquid Organic Fertilizer with Different Frequencies Eriko Kolompoy; Langimanapa Sofia Demmassabu; Stella M.T. Tulung; Stanley Adrian F. Walingkas; Maria Goretti Meyti Polii; Saartje Sompotan; Yefta Pamandungan
EUGENIA Vol. 31 No. 3 (2025): Eugenia
Publisher : Universitas Sam Ratulangi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35791/bk4rjk88

Abstract

Accurate and environmentally friendly fertilization is essential to optimize the growth of vegetable crops. This study aims to examine the effects of coconut water-based Liquid Organic Fertilizer (LOF) on the growth and yield of red amaranth (Amaranthus tricolor L.) under different application frequencies. The experiment was conducted from February to April 2025 at the Greenhouse of the Faculty of Agriculture, Sam Ratulangi University, Manado. A Completely Randomized Design (CRD) was used with four treatments: F0 (control/no LOF), F1 (LOF application once per week), F2 (twice per week), and F3 (three times per week), with each treatment receiving 250 ml per liter of water. Each treatment was replicated four times for a total of 16 experimental units and 32 plants. Observed parameters included plant height, number of leaves, and fresh weight. The results showed that application of coconut water LOF once a week (F1) significantly improved plant height, leaf number, and biomass compared to the control. However, increasing frequency beyond once a week (F2 and F3) did not lead to significant improvements, suggesting that one weekly application is sufficient and efficient. Therefore, coconut water-based LOF is recommended as an effective, eco-friendly alternative for red amaranth cultivation. Keywords: Red amaranth, Amaranthus tricolor L., liquid organic fertilizer, coconut water, frequency, plant growth
PENGARUH PENGGUNAAN EKSTRAK BAWANG PUTIH (Allium sativum L.) SEBAGAI ZPT ALAMI PADA PERAKARAN STEK PUCUK KRISAN (Chrysanthemum morifolium R.): The Effect of Garlic Extract (Allium sativum L.) as a Natural Plant Growth Regulator on the Rooting of Chrysanthemum (Chrysanthemum morifolium R.) Shoot Cuttings Mikha Polimpung; Yefta Pamandungan; Saartje Sompotan; Johannes Elie Xaveriano Rogi; Jeanne Martje Paulus; Langimanapa Sofia Demmassabu
EUGENIA Vol. 31 No. 3 (2025): Eugenia
Publisher : Universitas Sam Ratulangi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35791/vwytgv09

Abstract

Chrysanthemum is an ornamental plant prepared for export by the City of Tomohon, but the availability of seedlings remains limited. Vegetative propagation with the aid of garlic extract as a natural growth regulator (PGR) can be a solution to accelerate the rooting of shoot cuttings.This study aimed to determine the effect of using garlic extract (Allium sativum L.) and to identify the best concentration of garlic extract as a natural PGR on the root development of chrysanthemum shoot cuttings (Chrysanthemum morifolium R.). The research was conducted in September 2024 at the Screen House of the UPTD Seed Breeding and Agrotourism Show Window, Tomohon City. The study used a Completely Randomized Design (CRD) with five levels of garlic extract concentration treatments: P0 (0% garlic extract + 100% sterile water), P1 (25% garlic extract + 75% sterile water), P2 (50% garlic extract + 50% sterile water), P3 (75% garlic extract + 25% sterile water), P4 (100% garlic extract + 0% sterile water). Each treatment was replicated three times, with three cuttings per experimental unit, resulting in a total of 45 cuttings. The observation data were analyzed using ANOVA and further tested with the 5% Least Significant Difference (LSD) test. The results showed that garlic extract had an effect on the root length of chrysanthemum shoot cuttings and provided protection against pest and disease attacks. Keywords: Garlic extract; Natural PGR; Shoot cuttings; Root growth; Chrysanthemum.
Co-Authors Alen Mintalangi Antje Grace Tulungen Bertje R.A. Sumayku Edy Lengkong Eriko Kolompoy Ir Serly Ivone Kawuwung Jantje Pongoh Jeanne Martje Paulus Johannes Elie Xaveriano Rogi Johannes Elie Xaverino Rogi Langimanapa Sofia Demmasabu Langimanapa Sofia Demmassabu Maria Goretti Meity Polii Maria Goretti Meyti Polii Marsela Deana Ratu Meity Rosadelly Rantung Meryctris Mikha Polimpung Paula Clara Heinny Supit Pemmy Tumewu Rian Yehezkiel Daud Lintong Rini Audina Berahima Saartje Sompotan Sesilia Anita Wanget Stanley Adrian F. Walingkas Stella M.T. Tulung Stella Maria Theresia Tulung Ventje Pangemanan