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All Journal Jurnal Agronomi Indonesia (Indonesian Journal of Agronomy) JURNAL ILMU PERTANIAN Jurnal Penelitian Karet Agrosains: Jurnal Penelitian Agronomi Abdimas Talenta : Jurnal Pengabdian Kepada Masyarakat Indonesian Journal of Agricultural Research Journal of Sylva Indonesiana International Journal of Basic and Applied Science Action Research Literate (ARL) PERTANIAN TROPIK Journal of Environmental and Development Studies
Nini Rahmawati
Universitas Sumatera Utara
Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Computer Science & IT Control & Systems Engineering Decision Sciences, Operations Research & Management Earth & Planetary Sciences Economics, Econometrics & Finance Education Electrical & Electronics Engineering Environmental Science Languange, Linguistic, Communication & Media Law, Crime, Criminology & Criminal Justice Mathematics Physics Social Sciences Veterinary

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Development of mangrove tourism area through making tourism umbrellas as well as private society preparation in Regemuk village Pantai Labu Sub-Distric Deli Serdang District Bakti, Darma; Rosmayati; Rahmawati, Nini
ABDIMAS TALENTA: Jurnal Pengabdian Kepada Masyarakat Vol. 4 No. 2 (2019): ABDIMAS TALENTA: Jurnal Pengabdian Kepada Masyarakat
Publisher : Talenta Publisher

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (353.394 KB) | DOI: 10.32734/abdimastalenta.v4i2.4179

Abstract

Regemuk Village has the potential to be developed into a new tourist destination village. The village which is located along the coastline of Deli Serdang Regency is geographically the closest village to Medan City and the location is adjacent to Kuala Namu Airport. One of the advantages of this village is the presence of a stretch of mangrove forest which is still quite good along the 7 km coastline. The development of the village into one of the beach tourism destinations has been a long-term discourse, but until now it has not been implemented. To realize this, it is necessary to explore the development of supporting facilities in order to initiate the development of the village into a tourist destination mangrove tourism area. Seeing this reality, the USU PPM Implementation Team through the Professor Serves Program Scheme helped community problems by developing mangrove forest areas and providing supporting facilities, namely beach tourism park umbrellas. The existence of this facility is expected to help increase the carrying capacity of this newly formed tourist site. This program will encourage the spirit of the realization of mangrove tourism areas and be able to produce other downstream tourism products.
Analysis of Organic and Conventional Lowland Rice (Oryza Sativa L) Cultivation Systems in Supporting Environmentally Friendly Agriculture in Beringin District, Deli Serdang Regency Zulfansyah, Ichfan; Rahmawati, Nini; Delvian
Journal of Environmental and Development Studies Vol. 2 No. 01 (2021): Journal of Environmental and Development Studies
Publisher : TALENTA Publisher, Universitas Sumatera Utara

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32734/jeds.v2i1.6195

Abstract

The application of organic agriculture in lowland rice farming is one of the interesting topics in an effort to reduce environmental pollution caused by the use of chemical fertilizers and pesticides. This study aimed to determine the level of production and analyze the environmental impact of the soil from the application of organic and conventional agriculture in the Banyan District, Deli Serdang Regency. The results showed that 1) There was a significant difference between the production of harvested dry grain (GKP) of organic paddy and the production of harvested dry grain (GKP) of conventional lowland rice. 2) The level of soil fertility in organic and conventional lowland rice farming has low criteria
Produksi dan Fisiologi Kedelai pada Kondisi Cekaman Kekeringan dengan Aplikasi Bradyrhizobium japonicum yang Diberi Penginduksi Genistein Hasanah, Yaya; Rahmawati, Nini
Jurnal Agronomi Indonesia (Indonesian Journal of Agronomy) Vol. 42 No. 2 (2014): Jurnal agronomi indonesia
Publisher : Indonesia Society of Agronomy (PERAGI) and Department of Agronomy and Horticulture, Faculty of Agriculture, IPB University, Bogor, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (310.822 KB) | DOI: 10.24831/jai.v42i2.8427

Abstract

ABSTRACTMutualism symbiosis between B. japonicum and soybean root is a complex case and managed by molecular signal exchange. Genistein is one of the main isoflavones in soybean root exudates which is responsive to nod gen induction in B. japonicum. Drought stress could give negative effect on the symbiosis. The aim of the research was to study the role of B. japonicum induced by genistein on production and physiological characters of soybean under drought stress. The experiment was conducted in a green house, Faculty of Agriculture, University of Sumatera Utara, using a randomized complete block design with three factors. The first factor was genistein induction, consisted of  with and without genistein. The second factor  was B. japonicum inoculation consisted of  without B. japonicum,  isolate 1, isolate 2 and isolate 3. The third factor  was soil water content condition, consisted of 40%, 60% and 80% of field capacity. The parameters observed were shoot dry weight, root dry weight,  net assimilation rate, dry weight per plant, 50 seeds weight and proline content. The result showed that increasing drought stress conditions decreased shoot dry weight, root dry weight, net assimilation rate, effective nodules number, seeds dry weight per plant and 50 seeds weight. The result showed that as an inducer of B. japonicum in drought stress condition, genistein reduced the effects of water stress on root nodulation of soybean. Proline acts as osmoregulator for increasing tolerance to drought stress in plants.Keywords: drought, genistein, soybean, root nodulation
Exploration of the Potential of Local Cassava Genotypes to Support Food Security in the Highlands of Toba Regency Setiawan, Andi; Rosmayati, Rosmayati; Rahmawati, Nini
Action Research Literate Vol. 9 No. 12 (2025): Action Research Literate
Publisher : Ridwan Institute

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.46799/arl.v9i12.3075

Abstract

One of the cassava-producing districts in the highlands topography is Toba Regency. Cassava plantation centres spread across Toba Regency are located in Laguboti District. Cassava land is starting to be displaced due to a lack of land management and processing. This study aims to enable the community to maximize the growth of cassava-based on different genotypes and land use according to soil characteristics so as to increase the production of cassava as a food crop in Toba Regency, North Sumatra, Indonesia. The method is the determination of land units, observations of morphological characteristics of cassava, observations of land characteristics, and the collection and analysis of soil samples on cassava fields carried out in the laboratory. The results were 7 types of cassava diversity in Toba Regency with different morphological characters, namely Malaysia (G1), Siroti (G2), Simerah (G3), Sumedang (G4), Siputih (G5), Adira (G6) and UJ5. (G7). The distribution of pH and nutrient content in each cassava field with different genotypes in Laguboti District, Toba Regency is very varied. pH ranged from acid-neutral, Nitrogen ranged from 0.17% – 0.63%, Phosphorus ranged from 0.05% – 0.24%, and Potassium ranged from 0.04% – 0.27%. The altitude of the place ranges from 920-940 m asl.
Studi Pengaruh Konsentrasi dan Frekuensi Pemberian NAA Terhadap Pertumbuhan Tunas Stek Umbi Porang (Amorphohallus muelleri Blume) Mora, Yun Fita; Rahmawati, Nini; Siregar, Luthfi A M
AGRIUM: Jurnal Ilmu Pertanian Vol 29, No 1 (2026)
Publisher : UNIVERSITAS MUHAMMADIYAH SUMATERA UTARA

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30596/agrium.v29i1.26270

Abstract

Increasing industrial demand for porang requires efficient propagation strategies, such as tuber cuttings combined with NAA application to enhance shoot and root development. This study aimed to evaluate the effects of NAA concentration and application frequency on the growth of porang tuber cuttings. The experiment was conducted from July to December 2024 in Pagar Merbau III Village, Lubuk Pakam District, and at the Biotechnology Laboratory, Faculty of Agriculture, University of North Sumatra, using a two-factor Randomized Block Design with three replications. The treatments consisted of four levels of NAA concentration (0, 50, 100, and 150 ppm) and two application frequencies (single application at the beginning of the nursery stage and repeated application at the beginning of the nursery stage and 7 days after sowing). Observed variables included shoot emergence percentage, plant growth, biomass, tuber weight, chlorophyll content, and stomatal density. Data were analyzed using ANOVA followed by Duncan’s Multiple Range Test at a 5% significance level. The results showed that the application of NAA at 100 ppm significantly enhanced shoot growth, plant height, fresh and dry weight, chlorophyll content, and stomatal characteristics. A single application at the early nursery stage produced optimal results in plant height, tuber weight, and chlorophyll content, while repeated application increased the number of shoots, vegetative growth, and biomass accumulation. The interaction between 100 ppm NAA and early application resulted in the best performance in leaf number at 3 weeks after planting and tuber weight.
Organic Fertilizer and Oligochitosan to Increase The Growth of Elephant Foot Yam (Amorphophallus muelleri Blume) Plants Rahmawati, Nini; Br Sinaga, Siti Zarah
Agrosains : Jurnal Penelitian Agronomi Vol 27, No 2 (2025): Agrosains: Jurnal Penelitian Agronomi
Publisher : Universitas Sebelas Maret

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20961/agsjpa.v27i2.100896

Abstract

Increasing growth of elephant foot yam plants on ultisol  which is marginal soil can be attempted by application organic fertilizer in the form of tea waste compost and soaking bulbil as planting material using oligochitosan. This study aims to obtain the concentration of oligochitosan soaking and the dose of tea waste compost on the initial growth of elephant foot yam in Ultisol. This research was conducted on the land of Centre for Roots and Tuber Study Universitas Sumatera Utara, from October 2022 to January 2023. This study used a Randomized Block Design with 2 factors, namely the application of organic fertilizer doses (0; 39.25; 78.5; 117.75 tons/ha) and oligochitosan concentration (0; 1125; 2250; 3375 ppm). The results of the study showed application of organic fertilizer significantly accelerated the age of shoot emergence, increased plant height, stem diameter, age of bulbil emergence and number of bulbils. Soaking oligochitosan significantly increased plant height and number of bulbils. Based on this study, it is recommended to use organic fertilizer in the form of tea waste compost at a dose of 39.25 tons/ha and oligochitosan soaking with a concentration of 1125 ppm to increase the growth of elephant foot yam plants in Ultisol soil.
Co-Authors Afifudin Dalimunthe, Afifudin Andi Setiawan Arie Hapsani Hasan Basri Asmarlaili Sahar Hanafiah Br Sinaga, Siti Zarah Cemda, Abdul Rahman Darma Bakti Delvian Fitria Hamidah Hanum Harahap, Azmi wijayanti Harahap, Fitra Syawal Hilda Julia Hutagaol, Adventris Kurnia Selekta Etika Harefa Lubis, Nursiani Luthfi Aziz Mahmud Siregar Mariana, Merlyn Mora, Yun Fita Nur Ulina Warnisyah S Sebayang, Nur Ulina Warnisyah S Pratomo, Bayu prit, Kanvel Ridwansyah Rini Susanti Rosmayati Rosmayati Rosmayati Rosmayati Rosmayati Sihotang, Tambun Silvia Nora, Silvia Sinurat, Darwin Siregar, Luthfi A M Tengku Sabrina Walida, Hilwa Yaya Hasanah Yuliddar Abbas, M Astri Zulfansyah, Ichfan