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All Journal Jurnal Penelitian Karet JURNAL AGRICA Jurnal Ilmiah Pertanian ( JIPERTA) Jurnal Ilmiah Agribios Warta Perkaretan

Tumpal HS Siregar, Tumpal HS

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Author-ID : 598247

Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Decision Sciences, Operations Research & Management Economics, Econometrics & Finance Education Environmental Science Materials Science & Nanotechnology Social Sciences

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IDENTIFIKASI DAN UJI METABOLIT SEKUNDER BANGUN-BANGUN (COLEUS AMBOINICUS) TERHADAP PENYAKIT JAMUR AKAR PUTIH (RIGIDOPORUS MICROPORUS) DI LABORATORIUM Dalimunthe, Cici Indriani; Sembiring, Yan Riska Venata; Andriyanto, Mochlisin; Siregar, Tumpal HS; Darwis, Hilda Syafitri; Barus, Diana Alemin
Jurnal Penelitian Karet JPK : Volume 34, Nomor 2, Tahun 2016
Publisher : Pusat Penelitian Karet - PT. Riset Perkebunan Nusantara

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22302/ppk.jpk.v34i2.295

Penyakit Jamur Akar Putih (JAP) termasuk penyakit berbahaya ditinjau dari akibat yang ditimbulkannya dan dapat menyebabkan kerugian finansial yang dihitung secara nasional mencapai IDR 300 miliar setiap tahunnya. Pengendalian penyakit dengan memanfaatkan ekstrak bangun-bangun yang berpotensi sebagai antimikroba belum banyak diterapkan di perkebunan karet. Tujuan penelitian ini adalah untuk mengidentifikasi metabolit sekunder bangun-bangun dan mengetahui persentase penghambatan metabolit sekunder bangun-bangun terhadap penyakit JAP skala laboratorium. Penelitian menggunakan Rancangan Acak Lengkap (RAL) faktorial dengan 2 fakor dan 3 ulangan. Faktor yang digunakan adalah dosis dan pelarut (aseton, n-heksana dan metanol). Komponen yang dianalisis adalah akar dan daun bangun-bangun untuk mengetahui metabolit sekunder yang dihasilkan bangun-bangun melalui identifikasi fitokimia kemudian diekstraksi dengan berbagai pelarut untuk diuji terhadap Jamur Akar Putih (Rigidoporus microporus). Parameter yang diamati yaitu luas pertumbuhan jamur dan persentase penghambatan JAP. Hasil identifikasi fitokimia menunjukkan bahwa akar dan daun bangun-bangun mengandung senyawa flavonoida, glikosida dan saponin. Senyawa ini tergolong dalam kategori senyawa polar dan semipolar sehingga akan mudah diekstraksi dengan menggunakan pelarut polar (aseton). Uji pendahuluan ekstraksi akar dengan berbagai macam pelarut dan dosis menunjukkan interaksi yang berpengaruh nyata. Persentase penghambatan tertinggi terdapat pada ekstrak akar dengan menggunakan pelarut aseton sebesar 98,46% pada dosis 10%. Uji lanjutan hasil fraksinasi dengan menggunakan kertas cakram menunjukkan daya hambat terkuat terdapat pada fraksi n-heksana (14-18,5 cm), fraksi etil asetat (13,5-15,5 cm), dan ekstrak etanol (7-10,5 cm).

ANALISIS STRATEGI BISNIS UNIT / DISTRIK SERDANG PT. PERKEBUNAN NUSANTARA III MEDAN Johan, T.Syahmi; Siregar, Tumpal HS; Hafiz, Faoza
JURNAL AGRICA Vol 5, No 2 (2012): JURNAL AGRICA
Publisher : Universitas Medan Area

The strategy is an action that is incremental (constantly increasing) and continuously, and is based on the customer expected in the future. The speed of innovation of new markets and changing patterns of consumer requires core competencies. This research was conducted at PT. PTPN III Serdang District II (DSER 2), with the objectives of : (1) to analyze the strengths, weaknesses, threats and opportunities the business units of PTPN III, (2) to identify the business strategies implemented by each business unit/district in PTPN III, as one of the incremental actions and continous for the customers expectations towards the products.The results showed that: (1) based on internal factor analysis, the strengths and the weaknesses of the business unit District of Serdang II are the high sales value, healthy financial condition, organizational structure, educational background, soil fertility and plant age composition.While the weakness of the business unit are the age composition of employees, competitive HPP and activity based costing, (2) the opportunities and threats in the business unit Serdang District II are the development of downstream industries, foreign currency appreciation, global cultural phenomenon, waste utilization and increased market share. While the threat of the business unit are the environment business security, economics and the global financial crisis, the competitor technology development, product availability substitution, selling price volatility changes and consumer demand, (3) the business unit Serdang District II has the strengths to increase the productivity through the optimization aspects of culture and technology plants, improving coordination and synergy with related parties in the cost efficiency of every business activity and encourage the improvement of the quality and competence of the Human Resources (HR), (4) the business strategy that can be done by business unit Serdang District II are the aggressive strategy intensive, vertical integration and strategy diversifrkasi. By the three alternative strategies that have been, the intensive strategy is the main option to be implemented, the integration strategy and diversification strategy. Keywords : strategy, incremental, continuous and customer orientation

Analisis Pemasaran Kelapa di Kecamatan Tanjung Tiram Kabupaten Batubara Eldiyus, Rahmadani; Siregar, Tumpal HS; Lubis, Syaifuddin
JURNAL AGRICA Vol 6, No 2 (2013): JURNAL AGRICA
Publisher : Universitas Medan Area

Tanjung Tiram District is the central areas and the potential for development of coconut commodities because of the natural conditions. The purpose of the study was to determine the coconut marketing channel system, to know the marketing margin on each marketing channel and to determine the level of coconut marketing efficiency. This research is quantitative descriptive by survey method. The research instruments used the interviews and questionnaires. The respondents in the sample used by 80 coconut farmers at Tanjung Tiram District of Batubara Regency. The result of study shows that the most small marketing margin at channel 3 (coconut farmer - retailer - consumer) of Rp. 700/piece of coconut, while the most of marketing margin at channel 2 (coconut farmer - wholesaler - consumer) and channel 5 (coconut farmer - trader - merchants of the city - town factory or retailer - consumer). The conclusion of this study is there are 5 types of coconut marketing channels at Tanjung Tiram District. In terms of the coconut marketing margin that channel 3 most efficient compared to channel 1, 2, 4 and 5. The farmers choose the channel 1, channel 2, channel 4 and channel 5 even buy coconut at a price lower than the channels 3 because of the four marketing channels to absorb any coconut production whenever farmers at harvest time. Keyword : coconut, traders, marketing

Strategi Pengembangan Komoditi Karet di Kabupeten Tapanuli Selatan Nurhafifah, Nurhafifah; Siregar, Edi Batara Mulya; Siregar, Tumpal HS
JURNAL AGRICA Vol 4, No 2 (2011): JURNAL AGRICA
Publisher : Universitas Medan Area

The rubber is one of the plantation commodity which is the source of livelihood for 1.6 million peasant families, as well as the second largest source of foreign exchange after palm oil and also employers as well as suppliers of various raw materials in the domestic rubber industry. As a commodity plantation, in the development, are required to contribute to optimal results both for the welfare of the community and the sustainability of its business . The objectives of this study are: to determine the external and internal strategic factors that influence the development of smallholder rubber agribusiness in South Tapanuli, to determining the strategic formulation of smallholder rubber development of agribusiness in South Tapanuli, and construct the strategic priority to develop agribusiness in smallholder rubber South Tapanuli .From the analysis, can be conclusions that: there were 13 external strategic factors and 10 internal strategic factors affecting the development of smallholder rubber agribusiness in South Tapanuli. The results of analysis by the SWOT matrix and QSPM analysis can be recommended six priority smallholder rubber agribusiness development strategy and medium term and six long-term strategic priorities to be diimplemerrtasikan by policy makers to agribusiness development of smallholder rubber in South Tapanuli . Keywords : rubber, SWOT and QSPM, agribusiness

POLIKULTUR BERBASIS KARET UNTUK MENDUKUNG KETAHANAN PANGAN NASIONAL Noer, Zoelherly; Indrawati, Asmah; Siregar, Tumpal HS; Junaidi, Junaidi
Warta Perkaretan Vol. 43 No. 2 (2024): Volume 43, Nomor 2, Tahun 2024
Publisher : Pusat Penelitian Karet - PT. Riset Perkebunan Nusantara

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22302/ppk.wp.v43i2.984

Ketahanan pangan merupakan masalah yang krusial bagi Indonesia. Perkebunan karet sangat potensial dikembangkan untuk produksi pangan dengan pendekatan polikultur. Namun demikian, adopsi pola ini masih terbatas dan belum berkelanjutan. Hasil-hasil penelitian menunjukkan produktivitas dan kelayakan ekonomi tanaman sela cukup menjanjikan. Produktivitas tanaman pangan utama yaitu padi, jagung dan kedelai pada pola polikultur rata-rata mencapai masing-masing 1,2 ton/ha, 3,0 ton/ha, dan 0,8 ton/ha dengan rasio pendapatan dan biaya (R/C ratio) berkisar antara 1,17 – 2,85. Sistem ini berpotensi sebagai penggerak ekonomi masyarakat, namun dalam pelaksanaannya masih dijumpai beberapa kendala, di antaranya biaya pemeliharaan dan resiko gagal panen tinggi, ketidakpastian pasar dan keterbatasan modal. Untuk mewujudkannya sistem polikultur berbasis karet yang berkelanjutan diperlukan penyesuaian kultur teknis dan melibatkan pengolahan pasca panen dan komunitas masyarakat sehingga produk yang dihasilkan memiliki nilai tambah yang tinggi

Uji Keberagaman Umur Batang Bawah Kakao (Theobroma Cacao L.) Pada Teknik Sambung Pucuk Rizky, Muhammad Nazli; Siregar, Tumpal HS
Jurnal Ilmiah Pertanian ( JIPERTA) Vol 7, No 2 (2025): Jurnal Ilmiah Pertanian (JIPERTA), September
Publisher : Universitas Medan Area

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31289/jiperta.v7i2.6002

Cocoa (Theobroma cacao L.) is a strategic commodity in the plantation subsector that plays an important role in the Indonesian economy, both as an industrial raw material and a source of foreign exchange for the country. However, cocoa productivity at the farmer level is still relatively low, one of which is due to the use of genetically non-uniform generative seeds. To overcome this problem, the vegetative propagation technique through shoot grafting is an effective alternative because it is able to maintain the superior properties of the mother plant and accelerate the fruiting period. This study aims to examine the optimal lifespan of the rootstock in the cocoa shoot grafting technique through a literature study approach. The analysis was carried out on 22 scientific articles published in 2012–2023 that met the criteria of relevance, scientific reputation, and focus on cocoa plant propagation. The results of the study show that the lifespan of the rootstock between 8–10 weeks is the most optimal phase for splicing, because at that age the stem tissue has an ideal balance between flexibility and physiological maturity. Other factors such as upper and lower stem compatibility, joining techniques, and environmental conditions also greatly affect the success rate. This study provides a practical basis for the efficient and sustainable development of cocoa nurseries.

PERBANDINGAN BIAYA DAN STRATEGI PEMBIBITAN DUA PENGUSAHA PEMBIBITAN KELAPA SAWIT DI KABUPATEN BANYUASIN PROVINSI SUMATERA SELATAN Juniarrafiq, Mhd. Dwika; Lubis, Yusniar; Siregar, Tumpal HS; Manullang, Endang Sari
AGRIBIOS Vol 23 No 1 (2025): JUNI
Publisher : Program Studi Agribisnis Fakultas Pertanian

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36841/agribios.v23i1.6116

The use of superior seeds in the community is still very limited, among other things, due to the low knowledge of farmers about superior seeds and the very low ability of farmers to buy seeds because of the very high prices. in meeting the certified palm oil seed market it is necessary to use cost analysis and strategies in developing certified palm oil seeds to farmers in increasing oil palm production and increasing farmers' income in utilising the land area owned. The purpose of this study is to determine the comparison of the cost analysis of the procurement of certified oil palm seeds CV. Gotama and CV. BSM and development strategies carried out in the procurement of certified oil palm seeds. Research Methods This research uses primary data approaches and secondary data. sample withdrawal in this study is the census method or other names, namely the type of Non Probability Sampling, namely CV. Gotama and CV. Bumi Sriwijaya Mandiri with cost and strategy analysis methods. The results showed that the revenue generated at CV. Gotama worth Rp. 8,220,634,998 and at CV. BSM worth Rp. 7,589,670,856. This means that the income generated by CV. Gotama in value is greater than CV.BSM but with the total production produced CV.BSM can streamline production and production prices and swot analysis, namely Quadrant I. Which means the company has an advantageous situation. Cv Gotama and Cv Bumi Sriwajaya Mandiri have opportunities and strengths so that they can take advantage of existing opportunities.

Co-Authors Asmah Indrawati Cici Indriani Dalimunthe Diana Alemin Barus, Diana Alemin Edi Batara Mulya Siregar Eldiyus, Rahmadani Hafiz, Faoza Hilda Syafitri Darwis, Hilda Syafitri Johan, T.Syahmi Junaidi Junaidi Juniarrafiq, Mhd. Dwika Lubis, Syaifuddin Manullang, Endang Sari Mochlisin Andriyanto, Mochlisin Noer, Zoelherly Nurhafifah, Nurhafifah Rizky, Muhammad Nazli Yan Riska Venata Sembiring, Yan Riska Venata Yusniar Lubis

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