Jurnal Pertanian Tropik https://talenta.usu.ac.id/jpt <p align="justify"><span class="" lang="en"><span class="">Tropical Agriculture Journal (JPT) is a peer-reviewed online journal of Agriculture Postgraduate Study Program Universitas Sumatera Utara (USU). Journal is a result of research, or scientific reviews of researchers, students and agricultural institutions, and others related to agricultural studies in the tropical region. Published in Indonesian and English language with 3 volumes/year (April, August, December) in 20 Articles</span></span></p> <p align="justify"><span class="" lang="en"><span class=""><span id="result_box" class="" lang="en">Since Vol. 6, No. 3 of 2019, Jurnal Pertanian Tropik Journal moved to the https://talenta.usu.ac.id/jpt/ page facilitated by Talenta Publisher, University of Sumatra Utara, Medan, in order to improve the governance of scientific publications in the Open Journal System (OJS ) </span></span></span><span class="" lang="en"><span class="">ISSN (Print/ Online): 2356-4725/ 2655-7576</span></span></p> <p align="justify"><span class="" lang="en"><span class="">The journal of tropical agriculture has been accredited by the Ministry of Technology Research and Higher Education No. 21 / E / KPT / 2018</span></span></p> <p align="justify"> </p> Talenta Publisher en-US Jurnal Pertanian Tropik 2655-7576 Quality and Consumers Acceptence of Shredded Rough Flathead Fish (Grammoplites scaber) https://talenta.usu.ac.id/jpt/article/view/8520 <p>Shredded fish is a type of processed fish that is seasoned, processed by boiling and frying. The resulting product has a soft shape, good taste, special smell, and has a relatively long shelf life. This study aims to find out the level of acceptance of panelists through organoleptic test and find out the quality of shredded fish products from Rough flathead (Grammoplites Scaber) through proximate tests. the method used in this study consists of three stages. the first stage is the stage of making shredded fish. The second stage is organoleptic testing. next is the third stage of proximate testing. Organoleptic test results of shredded fish from Rough flathead (Grammoplites scaber) is 9.00 appearance, 8.66 smell, 8.48 taste, and 8.48 texture. The proximate test results of water content values of 12.20%, ash content of 6.93%, fat content of 19.01%, protein content of 22.93%, and carbohydrate content of 9.06%.</p> Khoiriah Muhammad Zakiyul Fikri Marnida Yusfiani Copyright (c) 2022 Jurnal Pertanian Tropik 2022-06-14 2022-06-14 9 1, April 001 008 10.32734/jpt.v9i1, April.8520 The Impact of Liquid Organic Fertilizer on Growth and Crop Production of Melon (Cucumis melo L.) https://talenta.usu.ac.id/jpt/article/view/6880 <p>Melon (Cucumis melo L.) is one of the most popular fruit commodities in Indonesia, thanks to its sweet, wonderful flavor, as well as its high nutritional content and nutritional value. Consumer demand for melons is very high, both locally and internationally, although the sugar level of this particular melon is not too sweet. A melon (<em>Cucumis melo L</em>.) is a herbaceous annual plant that grows on vines and is a member of the cucumber family. This study aimed to determine the optimum concentration of cow urine for development (Cucumis melo L.). The experiment used a fully randomized design (CRD) with one factor, namely the concentration of 6-level bio urine, namely B0 = 0 percent bio urine, B1 = 10 percent bio urine, B2 = 20 percent bio urine, B3 = 30 percent bio urine, B4 = 40 percent bio urine, and B5: 50 percent bio urine from 100 ml/plant recommendation. The research findings indicated that application of bio-liquid organic fertilizer (POC) to cow urine may increase: plant length, stem diameter, number of male flowers, and number of female flowers with the best 10 percent POC bio-cow urine. Melon growing can produce 10 percent bio-liquid organic fertilizer (POC) from cow urine.</p> Lisdayani Ifan Aulia Candra Copyright (c) 2022 Jurnal Pertanian Tropik 2022-03-11 2022-03-11 9 1, April 009 014 10.32734/jpt.v9i1, April.6880 Pembuatan Marinasi Udang Swallow (Penaeus merguiensis) Dengan Pengolahan Bumbu Yang Berbeda https://talenta.usu.ac.id/jpt/article/view/8517 <p>Shrimp is one of the most popular types of seafood. Processed in any way, such as fried, steamed, baked, or made into&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; a salad, shrimp is still delicious to eat. Marinating is the process of soaking meat in a marinade, before it is further processed. This study aims to determine the level of consumer acceptance of the manufacture of swallow shrimp marinade with different spice processing based on the hedonic test and to determine the nutritional content of the best value from the hedonic test of shrimp marinade with different spice processing. The shrimp marinade research method was divided into three stages. The first stage is sample and material preparation, the second stage is making shrimp marinade and the third stage is hedonic and proximate testing of the marinade. The research treatment design used was a completely randomized design (CRD). The results of the study obtained the best value from the hedonic test of shrimp marinade with the criteria of appearance = 6.30, aroma = 6.46, texture = 6.46 and taste = 5.85. The results of the test of the nutritional content of the marinade were based on the best value of the hedonic test results, namely water content = 73.61%, ash content = 5.45%, fat content = 0.31, protein content 19.26% and carbohydrate content 1.38.<em>Keywords: Swallowed shrimp, Marinated, Hedonic Test, Proximate Test</em></p> Ahyani Ridhayani Lubis Ayu Diana Hermanto Muhajjir Copyright (c) 2022 Jurnal Pertanian Tropik 2022-06-14 2022-06-14 9 1, April 015 025 10.32734/jpt.v9i1, April.8517 Optimum Dosage of N Determination in achieve Optimization of Hybrid Rice Grain Contents Percentage https://talenta.usu.ac.id/jpt/article/view/8597 <p>Padi hibrida mulai dikembangkan oleh para peneliti untuk mendukung peningkatan produksi padi nasional karena sifatnya yang dapat menghasilkan produksi lebih tinggi dibandingkan padi inbrida. Namun, di Indonesia peningkatan hasil panen padi hibrida belum sesuai harapan, salah satunya karena penerapan teknik budidaya yang kurang cermat, termasuk teknik pemupukan. Penelitian ini dilakukan untuk mengetahui dosis pemupukan nitrogen yang optimum pada padi hibrida yang dapat mendukung perolehan persentase gabah isi tertinggi. Penelitian ini menggunakan Rancangan Acak Kelompok Lengkap dengan dua faktor dan tiga ulangan. Faktor pertama adalah dosis pupuk N (0 kg N/ha, 100 kg N/ha dan 200 kg N/ha), faktor kedua adalah varietas padi hibrida (Mapan-P05, Intani 602 dan SL8SHS-Sterling). Variabel yang diamati meliputi karakteristik pertumbuhan (jumlah daun) serta hasil dan komponen hasil padi hibrida (jumlah gabah per malai, bobot gabah per rumpun, persentase gabah isi). Data penelitian dianalisis dengan analisis varians dan regresi polinomial. Hasil penelitian menunjukkan bahwa dosis pemupukan N optimum untuk varietas Mapan-P05, Intani 602 dan SL8SHS-Sterling adalah 98,79 kg N/ha (R<sup>2</sup>=0,805), 104,34 kg N/ha (R<sup>2</sup>=0,919) dan 99,78 kg N/ha (R<sup>2</sup>=0,809).</p> Risqa Naila Khusna Syarifah Purwanto Hana Hanifa Copyright (c) 2022 Jurnal Pertanian Tropik 2022-06-15 2022-06-15 9 1, April 026 031 10.32734/jpt.v9i1, April.8597 Characterization and Test of Endophytic Bacterial Isolates to Control Leaf Blight on Acacia Seeds (Acacia crassicarpa) https://talenta.usu.ac.id/jpt/article/view/8656 <p><strong>ABSTRACT</strong></p> <p>Acacia is a type of plant that recommended for development of industrial forest plantations (HTI) especially pulp and paper. According to Central Statistics Agency (2020), area of ​​​​acacia HTI in Riau Province 2019 was 2,335,450 ha with a log output of 31,509,228m<sup>3 </sup>and total pulp export of 2,952.4 million US dollars. The need for paper pulp has increased every year. Problems in acacia nursery area is presence of disease caused by Xanthomonas sp. Bacterial leaf blight causes significant losses in procurement of acacia seedlings, so we need an alternative control with environmentally friendly and sustainable by utilizing potential of biological agents in controlling leaf blight. This aimed to study potential of endophytic bacterial isolates against bacterial pathogen Xanthomonas sp. by adopting a Completely Randomized Design (CRD). The results showed that there were 9 isolates of endophytic bacteria that had inhibitory power against Xanthomonas sp., bacterial isolates in hypersensitivity test did not show symptoms of necrosis in tobacco leaves, results of physiological and biochemical tests on levan test and VP test showed differences in reaction results on tested endophytic bacteria isolates and it was found isolate of endophytic bacteria B8 was effective as an antagonist agent in controlling disease.</p> <p><strong>Keywords:</strong> acacia; characterization; endophytic bacteria; in vitro; in vivo; Xanthomonas sp.</p> ROMAYANJU BR SIAGIAN Fifi Puspita Muhammad Ali Bayo Alhusaeri Copyright (c) 2022 Jurnal Pertanian Tropik 2022-06-16 2022-06-16 9 1, April 032 044 10.32734/jpt.v9i1, April.8656