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All Journal EUGENIA Jurnal Agroekoteknologi Terapan AGRI-SOSIOEKONOMI
Walingkas, Stanley A. F.
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Agriculture, Biological Sciences & Forestry Economics, Econometrics & Finance Environmental Science Social Sciences

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PENGARUH PUPUK ORGANIK KIRINYU UNTUK EFISIENSI PENGGUNAAN PUPUK UREA PADA PERTUMBUHAN TANAMAN PADI (Oryza sativa L.) Tumewu, P.; Nangoi, Ronny; Walingkas, Stanley A. F.; Porong, Vikson J.; Tulungen, A. G.; Sumayku, Bertje R. A.
EUGENIA Vol 25, No 3 (2019)
Publisher : Universitas Sam Ratulangi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35791/eug.25.3.2019.33863

Abstract

Conventional agriculture relies on the use of artificial chemical fertilizer, such as urea,during every planting season, causing a decrease in soil fertility. Unfertile land has a negative effect on rice production, putting strain on farmers.A replacement or complement for chemical fertilizers needs to be found; other than the negative long-term effects, increased demand for urea in the planting season can make it hard to find when farmers need it most. An organic alternative is kirinyu (Chromolaena odorata) which has high concentrations of nitrogen and also phosphorous, potassium, and other micronutrients. Kirinyu grows abundantly around rural farms and plantations and makes up a lot of local biomass. The aims of this research are to 1) Assess the interaction of kirinyu organic fertilizer dosage and urea dosage towards the growth of rice (Oryza sativa L.), and 2) determine the most efficient dosage of kirinyu and urea fertilizer for the best growth in rice. The research used a randomized block factorial design. The treatments were:Factor I (A) = Dosage of kirinyu organic fertilizer. A1 = 10 tons/ha, A2 = 20 tons/ha. Factor II (B) = Dosage of urea fertilizer. B1 = 50 kg/ha, B2 = 100 kg/ha, B3 = 100 kg/ha. Each treatment was replicated three times, resulting in 18 experiment plots. Variables observed were:height of plant and number of seedlings. Data was analyzed using analysis of variance and Least Significant Differences (LSD) at a test level of 5%. Results show that the combination of kirinyu organic fertilizer and urea fertilizer has a significant effect on plant height and number of rice seedlings.
The Effects of Substituting Straw Compost for NPK Fertilizer On Field Rice Growth and Yield Using The SRI (System of Rice Intensification) Method Rantung , Rantung; Paulus, Jeanne M.; Supit, Paula C. H.; Ogie, Tommy B.; Lengkong, Edy F.; Walingkas, Stanley A. F.; Inkiriwang, Annatje E. B.; Doodoh, Beatrix; Pangemanan, Ventje; Najoan, Jemmy; Polii, Maria G. M.; Tulung, Stella Maria Theresia
Jurnal Agroekoteknologi Terapan Vol. 5 No. 1 (2024): EDISI JANUARI-JUNI 2024
Publisher : Sam Ratulangi University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35791/jat.v5i1.54192

Abstract

With an agroecological philosophy, the SRI (System of Rice Intensification) technique is a rice production technology approach that prioritizes soil, plant, and water management through local expertise and group empowerment based on environmentally beneficial activities. The purpose of this study is to investigate lowland rice growth and yield by using composted straw instead of NPK fertilizer. Implemented in Tara-Tara II village, West Tomohon sub-district for 5 (five) months with one factor treatment, namely the ratio of NPK fertilizer dose and straw compost dose: 100% NPK + straw compost 0% straw compost (P0), 75% NPK + 25% straw compost (P1), 50% NPK + 50% straw compost (P2), 25% NPK + 75% straw compost (P3), and 0% NPK + 100% straw compost (P4). The variables observed included: plant height, number of fodder, number of panicles/clumps, weight of 100 harvested dry grains, number of grains/panicles, percentage of smooth grains/clumps and harvested dry grain yield. Substitution of NPK fertilizer with compost straw has no effect on the height of lowland rice plants using the SRI (System of Rice Intensification) method, but does affect the number of productive tillers. The highest number of productive tillers was found in P2 (50% NPK + 50% straw compost), P3 (25% NPK + 75% straw compost) and P4 (0% NPK + 100% straw compost), with an average value of 31, respectively. 27; 28.20 and 27.53 tillers, while treatment P3 (25% NPK + 75% straw compost) and lower values in treatments P0 (100% NPK + 0% straw compost) and P1 (75% NPK + 25% straw compost ) with an average value of 25.83; and 25.67 offspring. Keywords: System of Rice Intensification (SRI), rice, straw compost.
Pengaruh Konsentrasi Biourine Untuk Meningkatkan Pertumbuhan Tanaman Kedelai (Glycine max (L.) Merill) Sompotan, Saartje; Tulungen, Antje Grace; Tulung, Stella M. T.; Tumewu, Pemmy; Polii, Maria G.; Doodoh, Beatrix; Raintung, Jeane S. M.; Titah, Tilda; Porong, Jelie V.; Walingkas, Stanley A. F.
AGRI-SOSIOEKONOMI Vol. 20 No. 2 (2024): Agri-Sosioekonomi
Publisher : Sam Ratulangi University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35791/agrsosek.v20i2.57063

Abstract

The purpose of the research was to study the effect of biourine on soybean plant growth, and to obtain the concentration of biourine that can increase soybean growth. To achieve the objectives, the research was designed using a completely randomized design. The treatments consisted of, A = No Biourine, B = 100 ml biourine/1 liter of water, C = 200 ml biourine/1 liter of water. Each treatment was repeated four times resulting in 12 experimental pots. The parameters observed were the number of leaves and the number of soybean branches. Data were analyzed using analysis of variance and 5% BNT test. The results showed that the application of biourine increased the growth of soybean plants as indicated by plant height and the number of leaves with three branches. The concentration of 100 ml biourine/1 liter of water increased the growth of soybean plants.
Effects of Polyembryonic Seed Types on Early Seedling Growth of Duku (Lansium domesticum Corr) Walingkas, Stanley A. F.; Tumewu, Pemmy; Rantung, Meity R.; Sintaro, Sanriomi; Paat, Frangky J.
Jurnal Agroekoteknologi Terapan (Applied Agroecotechnology Journal) Vol. 6 No. 2 (2025): ISSUE JULY-DECEMBER 2025
Publisher : Sam Ratulangi University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35791/jat.v6i2.58464

Abstract

Duku (Lansium domesticum Corr.) is an important tropical fruit tree in Indonesia, but the supply of uniform and vigorous planting material for orchard establishment remains limited. Polyembryony in duku seeds offers a potential source of clonal seedlings, yet the effects of different polyembryonic seed types and handling methods on seedling vigor are not well documented. This study evaluated early seedling growth of duku derived from zygotic and polyembryonic seeds under farmer managed nursery conditions in Eris Village, North Sulawesi. A randomized complete block design was used with five seed treatments and four replications: zygotic seed with a single embryo (Z1), intact polyembryonic seeds with two embryos (PU2), intact polyembryonic seeds with three embryos (PU3), polyembryonic seeds cut into two sections (PB2), and polyembryonic seeds cut into three sections (PB3). At the end of the nursery phase, number of leaves, plant height, stem diameter, leaf area, and root weight were recorded and analyzed by analysis of variance followed by the least significant difference test at the five percent level. Seed type significantly affected all traits. Zygotic seeds produced seedlings with the highest leaf number, plant height, stem diameter, leaf area, and root weight. Seedlings from cut polyembryonic seeds (PB2 and PB3) showed intermediate performance, with stem diameter and root weight close to those of zygotic seedlings. In contrast, seedlings from intact polyembryonic seeds with three embryos (PU3) had the lowest leaf number, leaf area, and root weight. These findings indicate that zygotic seeds remain the best option for producing vigorous duku seedlings, while sections of polyembryonic seeds, especially PB2 and PB3, can provide acceptable alternatives when zygotic seeds are limited or when clonal propagation is desired.   Keywords: duku; Lansium domesticum; polyembryonic seeds; seedling vigor; rootstock; nursery management
Eco-Enzyme as a Bioactivator for Converting Organic Wastes into Organic Fertilizer: Effects on Chili Pepper (Capsicum Annuum L.) Growth and Yield in Tomohon, Indonesia. Polii, Maria Goretti Meity; Tulungen, Antje Grace; Walingkas, Stanley A. F.; Sompotan, Saartje
Jurnal Agroekoteknologi Terapan (JAT) Vol. 7 No. 1 (2026): ISSUE JANUARY-JUNE 2026
Publisher : Sam Ratulangi University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35791/jat.v7i1.66742

Abstract

Eco-enzyme has been promoted as a low-cost bioactivator for converting organic residues into useful soil amendments, but comparative agronomic evidence across different waste substrates remains limited. This study evaluated eco-enzyme–assisted organic fertilizers prepared from several locally available organic wastes and assessed their effects on chili pepper (Capsicum annuum L.) growth and yield in Kakaskasen, Tomohon City, North Sulawesi, Indonesia, from April to October 2025. A pot experiment was arranged in a completely randomized design with six treatments and four replications (24 experimental units). Eco-enzyme was produced by fermenting fruit peels, sugar, and water (3:1:10) for three months. Organic fertilizers were prepared using eco-enzyme alone or eco-enzyme combined with vegetable waste, fruit waste, market waste, chicken-manure waste, or household organic waste, and were incorporated into the pot medium one week before transplanting at an equivalent rate of 20 t ha⁻¹. Plant height, fruit number per plant, and fresh fruit weight per plant were measured at 100 days after transplanting and analyzed using analysis of variance followed by the least significant difference test at 5%. Organic-waste substrate significantly affected all measured variables. The eco-enzyme + market-waste formulation produced the tallest plants (133.37 cm), the highest fruit number (89.50 fruits plant⁻¹), and the highest mean fresh fruit weight (225.25 g plant⁻¹), markedly exceeding eco-enzyme alone (69.12 cm; 36.75 fruits plant⁻¹; 78.75 g plant⁻¹). Overall, eco-enzyme–activated market-waste fertilizer was the most effective formulation for improving chili growth and yield under the conditions of this pot experiment. Keywords: Capsicum annuum; eco-enzyme; market waste; organic fertilizer; waste valorization
Co-Authors Doodoh, Beatrix Edy F. Lengkong Frangky J. Paat Inkiriwang, Annatje E. B. Jeanne M. Paulus Jemmy Najoan, Jemmy Nangoi, Ronny Ogie, Tommy B. Pemmy Tumewu Polii, Maria G. Polii, Maria G. M. Polii, Maria Goretti Meity Porong, Jelie V. Raintung, Jeane S. M. Rantung , Rantung Rantung, Meity R. saartje Sompotan Sanriomi Sintaro Sumayku, Bertje R. A. Supit, Paula C. H. Tilda Titah Tulung, Stella M. T. Tulung, Stella Maria Theresia Tulungen, Antje Grace Tumewu, P. Ventje Pangemanan Vikson J. Porong