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All Journal Agrosains: Jurnal Penelitian Agronomi Dinamisia: Jurnal Pengabdian Kepada Masyarakat AGROMIX Agroprimatech PRIMA: Journal of Community Empowering and Services Abdimas Galuh : Jurnal Pengabdian Kepada Masyarakat Bakti Cendana: Jurnal Pengabdian Masyarakat Jurnal Pasopati : Pengabdian Masyarakat dan Inovasi Pengembangan Teknologi Jurnal Pengabdian UNDIKMA International Journal Of Science, Technology & Management (IJSTM) AGRIC Open Access DRIVERset
Wilda Lumban Tobing
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Journal : Agrosains: Jurnal Penelitian Agronomi

 1 
Penggunaan Azotobacter dan Kompos Kulit Buah Kakao Terhadap Pertumbuhan dan Efisiensi Penggunaan Nitrogen Pada Pembibitan Utama Kelapa Sawit Wilda Lumban Tobing; Mariani Sembiring
Agrosains : Jurnal Penelitian Agronomi Vol 23, No 1 (2021): Agrosains: Jurnal Penelitian Agronomi
Publisher : Universitas Sebelas Maret

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20961/agsjpa.v23i1.49042

Abstract

The expansion of oil palm plantations continues to increase so that it requires quality seed. Nurseries need to be done before moving to the field. The use of Azotobacter and cocoa fruit skin compost is one way to increase the  growth and nitrogen use efficiency in oil palm in main nursery. This research was aimed to know the growth and nitrogen use efficiency of palm oil in main nursery. This research was conducted on the research area of the Agricultural Agribusiness College of Agriculture Practices (STIPAP) Medan and the Laboratory of Balai Pengkajian Teknologi Pertanian (BPTP) of North Sumatra and the Agricultural Laboratory of the University of North Sumatera from February until Juli 2013. The method used was Randomized Group Design factorial with 3 replications and followed by Duncan test at α=5%. The first factor is Azotobacter including without giving Azotobacter (A0), 20 ml/polybag (A1) and 40 ml/polybag (A2). The second factor is cocoa fruit skin compost, which consists of 3 of them, namely without compost (K0), 125 g/polybag (K1), and 250 g/polybag (K2). The research parameters were plant dry weight (g), nitrogen uptake (mg) and N use efficiency (EPN). The results showed that the use of Azotobacter and cocoa fruit skin compost were able to significantly increasing dry weight of plant and N uptake of oil palm seeds and gave the highest EPN value of 12.93.  
Serapan dan Efisiensi Penyerapan Hara N dan P Pada Pakcoy (Brassica rapa L. Ssp. Chinensis) Sistem Vertikultur di Lahan Kering Wilda Lumban Tobing; Eduardus Yosef Neonbeni; Asep Ikhsan Gumelar; Maria Angelina Tuas; Rolinus Sabuna
Agrosains : Jurnal Penelitian Agronomi Vol 24, No 1 (2022): Agrosains: Jurnal Penelitian Agronomi
Publisher : Universitas Sebelas Maret

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20961/agsjpa.v24i1.59912

Abstract

Pakcoy cultivation in dry land is still not optimal due to the growing environment that requires technology. Fertigation verticulture is used as an effort to increase pakcoy production in dry land. The purpose of this study was to determine the fertigation time, composition of planting media and the distance between planting holes and their interactions in increasing nutrient uptake and efficiency of N and P absorption for pakcoy plants on the vertical fertigation system. This research was carried out in the agricultural garden of the Main Seed Center of the North Central Timor Regency Agriculture Office from June to December 2021. The study used an experimental method with a Separate Plot Design with 3 plots where the main plot was the fertigation time which consisted of 3 levels, namely W1 (60 seconds). ), W2 (90 seconds), and W3 (120 seconds). The main subplot is the composition of the growing media which consists of 4 levels, namely: M1 (Soil: Sand (1:1)); M2 (Soil: Biochar (1:1)); M3 (Soil: Biochar (1:1)); and M4 (Soil: Sand: Biochar (1:1:1)). The subplots are the spacing of the planting holes consisting of 3 levels, namely: J1 (15 cm); J2 (20 cm); and J3 (25 cm). There were 36 treatments which were repeated 4 (four) times in order to obtain a total of 144 treatments. Data analysis used a comparative test using the Duncan Multiple Range Test method at 5% level. The results showed that the fertigation time of 120 seconds (W3) and the composition of the growing media: biochar (1:1) (M2) and their interactions increased the N and P uptake of pakcoy plants grown in a verticulture system on dry land by treatment. The fermentation time of 120 seconds (W3) and the composition of the growing media: biochar (1:1) (M2) also increased the efficiency of N and P nutrient absorption.
Vegetation and Seed Banks on Ex-manganese Mining in Kaubele Village Biboki Moenleu District Wilda Lumban Tobing; Kamaluddin Kamaluddin; Marinus Kofi
Agrosains : Jurnal Penelitian Agronomi Vol 25, No 1 (2023): Agrosains: Jurnal Penelitian Agronomi
Publisher : Universitas Sebelas Maret

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20961/agsjpa.v25i1.71966

Abstract

Mining activities are required to carry out reclamation. Reclamation efforts are aimed at restoring the condition of the mined land. The manganese mine in Kaubele Village has been carried out since 2011 but there has been no clear reclamation effort, causing the land to be abandoned. The study aimed to determine the vegetation and seed banks found on former manganese mining land in Kaubele Village, Biboki Moenleu District. This activity was carried out in July - December 2022 on former manganese mining land in 2010 and 2018. Vegetation was collected using a purposive sampling method. At each observation location, 5 main points were taken. Each point at each location is spread by 250 points with a 2 m x 2 m plot. The soil was taken at a depth of 0-20 cm and an area of 30 cm x 30 cm. Furthermore, it is placed in the nursery media for 3 months to find out the vegetation that grows. Vegetation and seed banks were analyzed based on species density, relative density, species frequency, relative frequency, and important value index. Vegetation analysis is a step in determining plants to restore ex-mining land. The vegetation in 2018 had more species compared to 2010. At both locations, there were the same 3 plants, namely Cynodon dactylon L. with an IVI of 21.421% (2010) and an IVI of 17.605% (2018), Chromolaena odorata L. with an IVI of 10.409% (2010) and IVI of 9.125% (2018), and Malvella leprosa (Ortega) krapov. with an IVI of 8.097% (2010) and an IVI of 7.031% (2018). Analysis of seed banks shows that there are 7 similar seeds found in different mining locations with respective IVI of Dactyloctenium aegyptium L. 78.550 % (2010) and 14.169 % (2018), Chloris virgata Trin 13.113 % (2010) and 8.986 % (2018), Panicum virgatum L. IVI 20.384 % (2010) and 46.834 (2017). (2018), Synedrella nodiflora L. IVI 22.068 % (2010) and 14.169 (2018), and Phyllanthus urinaria L. IVI 13.177 % (2010) and 12.957 % (2018).
Co-Authors Adolfianus Nino Adolfianus Nino Azor Yulianus Tefa Bria, Deseriana Carolus Emerik Kato CHAIRANI HANUM Dian I Y Ribka Stefanie Wongso, Paini Sri Widyawati, Tarsisius D B Fenny A K, Evelyn L W, Dian I Y Dominggas Ati Eduardus Yosef Neonbeni Eduardus Yosef Neonbeni Edy Sigit Sutarta Efieno Maria Paulo Soares Elviani Seran Febrya Christin Handayani Buan Florian Mayesti Prima Remba Makin Fransiskus Yulius Dhewa Kadju Gerson Frans Bira Gumelar, Asep Ikhsan Hadi Santoso Laurentinus Hyldegardis Naisali Imanuel Seran Indah Epriliati Jonisius Taus Kamaluddin Kamaluddin Kolo, Maria Magdalena Kristoforus Wilson Kia Kristoforus Wilson Kia Lisnahan, Charles V. Lukas Pardosi Mahardika Putra Purba Maria Afnita Lelang Maria Apriana Manehat Maria Magdalena Kolo Mariani Sembiring Marianus Asa Marinus Kofi Marinus Kofi Mata, Meri Helsiana Matius Stefanus Batu Maulana, Achmad Subchiandi Misail Epainetus Silla Misail Epainetus Silla Natalia Desy Djata Ndua Oktovianus Rafael Nahak Primus Ena Kaet Risna Erni Yati Adu Rolinus Sabuna Rolinus Sabuna Sipayung, Boanerges Putra tnunay, ite morina yostianti Tuas, Maria Angelina Veronika Sofia Jaquelin Talan Wiguna, Gede Arya