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All Journal Jurnal Farmasi Udayana Agrikultura AGROEKOTEKNOLOGI JURNAL ILMU PERTANIAN Jurnal Penelitian Pertanian Terapan Agrotekma: Jurnal Agroteknologi dan Ilmu Pertanian Jurnal Agro Estate Journal La Lifesci PERTANIAN TROPIK Jurnal Indonesia Sosial Teknologi Agrotech Journal Agroista: Jurnal Agroteknologi Agroland: Jurnal Ilmu-ilmu Pertanian

Mariani sembiring

Program Studi Agroteknologi, Fakultas Pertanian, USU, Padang Bulan, Medan- 20155, Indonesia.

Author-ID : 315614

Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Chemistry Computer Science & IT Earth & Planetary Sciences Economics, Econometrics & Finance Environmental Science Immunology & microbiology Law, Crime, Criminology & Criminal Justice Medicine & Pharmacology Social Sciences

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EVALUASI KEMAMPUAN LAHAN DESA SIHITONG, SINAR SABUNGAN DAN LUMBAN LOBU KABUPATEN TOBA SAMOSIR Sitohang, Julpan Lynneus; Sitorus, Bintang; Sembiring, Mariani
Jurnal Agroekoteknologi Vol 1, No 4 (2013)
Publisher : Universitas Sumatera Utara

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32734/jaet.v1i4.4391

Land capability evaluation is an evaluation of land potential for use of various farmingsystems in general without specifying the allocation to certain crops and management actions. Theresearch was conducted in April of 2012. The purpose of this study was to determine the landcapability class on Sihiong, Sinar Sabungan and Lumban Lobu Village Toba Samosir Distric withthe method of limiting factors and matching according to land capability class Arsyad (1989).Analysis of the soil such as soil texture, permeability, bulk density, salinity and organic material areconducted in the Laboratory of Research and Technology, Faculty of Agriculture, University ofNorth Sumatra and field observations such as slope, erosion factors, soil depth, drainage, gravel /rock and inundation / flood hazard. The results showed that areas Sihiong, Sinar Sabungan andLumban Lobu has actual land capability class is the same class III (es), Class III is in which landcan be used for the production of crops and forests, (es) an limiting factor on erosion and the depthof the root zone or soil (solum). So the capability class of potential land become III (s), which (s) isa limiting factor on the rooting area only.Keywords: evaluation of land capability, survey, BPS Tobasa

POTENSI BAKTERI AZOTOBACTER DAN HIJAUAN MUCUNA BRACTEATA DALAM MENINGKATKAN HARA NITROGEN KOMPOS TANDAN KOSONG KELAPA SAWIT Zoel Hani Hasibuan; T Sabrina; Mariani Br Sembiring
Jurnal Agroekoteknologi Vol 1, No 1 (2012)
Publisher : Universitas Sumatera Utara

ABSTRACT Potency of Azobacter and Mucuna bracteata forage in increasing the nitrogen content of oil palm empty fruit bunch (TKKS) compost. The management of oil palm empty fruit bunch (TKKS) is still a problem. One of the alternative to utilize this by product is by composting, but there’s still a problem in the low content of nitrogen. The nitrogen can be added from N fertilizer, manure, or by using N-fix microorganisms. The research was aimed to evaluate the potential of Azotobacter and Mucuna bracteata forage in increasing the nitrogen content of TKKS compost. The research was done using Factorial Randomized Block Design, consisting of 2 factors and 3 replication. The first factor was the inokulation time of Azotobacter that consists of 5 treatments (without application, initial application, 2 weeks, 4 weeks, and 6 weeks after composting) and the second factor was the composition of compost ingredient that consists of 3 treatments (100% TKKS, 80% TKKS + 20% M.bracteata, and 60% TKKS + 40% M.bracteata). The result showed that the formulation of compost ingreadients with M.bracteata forage influenced the rate of decomposition and nitrogen content significantly. The increased of nitrogen was 15.20% at the composition of 60% TKKS + 40% M.bracteata. The inoculation time (initial and 2 weeks after composting) increased 2.23% nitrogen content of TKKS. Interaction between Azotobacter application time at 4 weeks after composting with compost composition at 100% TKKS increased nitrogen content about 7.27%. The increasing nitrogen at the composition 80% TKKS + 20% M.bracteata increased nitrogen content about 8.24% by applying Azotobacter in the initial time of composting. Meanwhile, by increasing the amount of M. bracteata did not increase the nitrogen content. Keywords : oil palm empty bunches compost, Azotobacter, M. bracteata, nitrogen ABSTRAK Potensi bakteri Azotobacter dan hijauan Mucuna bracteata dalam meningkatkan hara nitrogen kompos tandan kosong kelapa sawit. Pengelolaan tandan kosong kelapa sawit (TKKS) masih menjadi permasalahan yang dihadapi pada saat ini. Salah satu alternatif pemanfaatan limbah tersebut adalah dengan pengomposan, namun permasalahan yang muncul adalah masih rendahnya kandungan nitrogen. Penambahan nitrogen ke dalam kompos dapat berasal dari pupuk N, hijauan, pupuk kandang maupun mikroorganisme penfiksasi N. Penelitian ini bertujuan untuk mengetahui potensi bakteri Azotobacter dan hijauan M. bracteata dalam meningkatkan hara nitrogen kompos TKKS. Penelitian ini menggunakan Rancangan Acak Kelompok (RAK) Faktorial yang terdiri dari 2 faktor dan 3 ulangan. Faktor pertama adalah waktu inokulasi Azotobacter yang terdiri dari 5 perlakuan (tanpa aplikasi, awal, 2, 4, dan 6 minggu setelah pengomposan) dan faktor kedua adalah komposisi bahan kompos yang terdiri dari 3 perlakuan (100% TKKS, 80% TKKS + 20% M.bracteata, dan 60% TKKS + 40% M.bracteata). Hasil penelitian menunjukkan formulasi bahan kompos dengan hijauan M. bracteata sangat mempengaruhi laju dekomposisi dan kandungan nitrogen dalam kompos. Peningkatan nitrogen sebesar 15.20% pada komposisi 60% TKKS + 40% M. bracteata. Pada perlakuan waktu aplikasi terjadi peningkatan nitrogen kompos TKKS sebesar 2.23% (awal dan 2 minggu setelah pengomposan). Pada interaksi antara waktu inokulasi Azotobacter tertinggi pada perlakuan 4 minggu setelah pengomposan dengan komposisi 100% TKKS berpengaruh terhadap peningkatan nitrogen sebesar 7.27%. Untuk komposisi 80% TKKS + 20% M.bracteata terjadi peningkatan nitrogen sebesar 8.24% dengan waktu aplikasi Azotobacter di awal pengomposan. Sementara pada komposisi M.bracteata yang lebih banyak tidak terjadi peningkatan nitrogen akibat adanya inokulasi Azotobacter ke dalam kompos TKKS. Kata kunci : kompos tandan kosong kelapa sawit, Azotobacter, M. bracteata, nitrogen

EVALUASI KEMAMPUAN LAHAN DESA SIHIONG, SINAR SABUNGAN DAN LUMBUN LOBU KABUPATEN TOBA SAMOSIR Julpan Lynneus Sitohang; Sitorus Sitorus; Mariani Sembiring
Jurnal Agroekoteknologi Vol 1, No 3 (2013)
Publisher : Universitas Sumatera Utara

Land capability evaluation is an evaluation of land potential for use of various farming systems in general without specifying the allocation to certain crops and management actions. The research was conducted in April of 2012. The purpose of this study was to determine the land capability class on Sihiong, Sinar Sabungan and Lumban Lobu Village Toba Samosir Distric with the method of limiting factors and matching according to land capability class Arsyad (1989). Analysis of the soil such as soil texture, permeability, bulk density, salinity and organic material are conducted in the Laboratory of Research and Technology, Faculty of Agriculture, University of North Sumatra and field observations such as slope, erosion factors, soil depth, drainage, gravel / rock and inundation / flood hazard. The results showed that areas Sihiong, Sinar Sabungan and Lumban Lobu has actual land capability class is the same class III (es), Class III is in which land can be used for the production of crops and forests, (es) an limiting factor on erosion and the depth of the root zone or soil (solum). So the capability class of potential land become III (s), which (s) is a limiting factor on the rooting area only. Keywords: evaluation of land capability, survey, BPS Tobasa

SURVEI DAN PEMETAAN STATUS FOSFAT LAHAN SAWAH PADA DAERAH IRIGASI BAHAL GAJAH/TIGA BOLON KECAMATAN SIDAMANIK KABUPATEN SIMALUNGUN Meilissa Damayanti Lumban Gaol; Supriadi Supriadi; Mariani Sembiring
Jurnal Agroekoteknologi Vol 1, No 4 (2013)
Publisher : Universitas Sumatera Utara

Survey and mapping phosphorus status on irrigated rice field at Bahal Gajah and Tiga Bolonvillage in Sidamanik Subdistrict. This research purpose to make a map phosphate status on wet ricefield in irrigation area Bahal Gajah/Tiga Bolon. The research start to do on May until December2012. Method of sample take use free grid survey method with semi detail survey scale. Result ofanalysis process using regreation method, with Geografis Information System (GIS) program.Parameter that analysis in laboratory is phosphate available and phosphate total. The result ofresearch showed that phosphate available divided by 3 status such as; medium (6,087 ha), high(136,005 ha), and highest (286,101 ha). Phosphate total divided by 3 status such as; medium(48,393 ha), high (109,445 ha), and highest (269,263 ha).Key words: mapping, phosphorus

DAMPAK DEBU VULKANIK LETUSAN GUNUNG SINABUNG TERHADAP KADAR Cu, Pb, DAN B TANAH DI KABUPATEN KARO Raja Forman Barasa; Abdul Rauf; Mariani Sembiring
Jurnal Agroekoteknologi Vol 1, No 4 (2013)
Publisher : Universitas Sumatera Utara

The Study of Effect Volcanic Ash Eruption of Sinabung Mountain on the Content of Copper, Lead,and Boron of Soils at Karo District. Have been done at six locations using Soils Survey Method onSeptember 2010 until March 2012. Each of site soil sampling were done by purposive sampling attwo depths (0-5 cm and 0-15 cm) with two replications. The results showed that at 0,5-15 mm ofthickness of volcanic ash containt at very low level Copper, content of Boron were moderate, high,and very high and content of Lead was at admitted level at 0-5 cm and 0-15 cm soil depth at somesites at Karo DistrictKeywords: volcanic ash, copper, lead, and boron

MORFOLOGI DAN KLASIFIKASI TANAH DI LERENG UTARA GUNUNG SINABUNG KABUPATEN KARO SUMATERA UTARA Ridwandi Ridwandi; Muklis Muklis; Mariani Sembiring
Jurnal Agroekoteknologi Vol 2, No 1 (2013)
Publisher : Universitas Sumatera Utara

The survey research is aimed to know the morphology and classification of soils at north slope ofMt.Sinabung. This research was conducted in Subdistrict Naman Teran, District Karo, NorthSumatera Province. Three selected pedons were observed at top slope, middle slope, and bottomslope. Soil samples were taken from each horizon for analysis soil texture, bulkdensity, pH H2O,pH KCl, pH NaF, Aldd, Base Saturation, CEC, ZPC (Zero Point of Charge), Organiccontent, P-retention, P-total, Al-oxsalate extracted (Alo), Si-oxsalate extracted (Sio), and Feoxsalateextracted (Feo) in The Chemical Soil Fertility and Research and Technology Laboratory,Agricultural Faculty of North Sumatera University, Medan. The result of the observation and theanalysis showed that the top slope soil has a rock material of lava which has been solid through ashallow solum, the middle slope soil have a perent material of lahars through a thick solum, and thebottom slope soil have a parent material of volcanic ash through a thick solum. According to SoilTaxonomy, the top slope soil is classified into su group Andic Dystrudept, however both of themiddle slope soil and the bottom slope soil are classified into sub group Typic Hapludand.Key Word : Mt.sinabung, soil classification. Soil morphology

EVALUASI KESESUAIAN LAHAN UNTUK PADI SAWAH TADAH HUJAN (Oryza sativa L.) DI KECAMATAN MUARA KABUPATEN TAPANULI UTARA Yopie Priest Aulia Sinaga; Razali Razali; Mariani Sembiring
Jurnal Agroekoteknologi Vol 2, No 3 (2014)
Publisher : Universitas Sumatera Utara

This study aimed to evaluate the suitability of land in Muara North Tapanuli for rainfed paddyfields. Based on a map of soil type and slope maps generated from topographic maps with a scaleof 1: 50,000, then be overlaid. Raised 3 LMU(Land Map Unit) are eligible to be assessed for rainfedpaddy crop. The assessment of land suitability classes with appropriateness rainfed paddy fieldscriteria is based on Djaenuddin, et al., 2011. The results showed that the potential land suitabilityclass LMU 1 isN (rc), potential land suitability class LMU 2 is S3 (tc), potential land suitabilityclass LMU 3 is S3 (tc, rc). Potential land area for rainfed paddy fields in the district of Muara is of1844 hectares.

Pengaruh Bahan Mineral dan Air Laut terhadap Sifat Fisika – Kimia Tanah dan Pertumbuhan Padi di Lahan Gambut Dataran Tinggi Jul Bahori Panggabean; Sarifuddin Sarifuddin; Mariani Mariani Br. Sembiring
Jurnal Agroekoteknologi Vol 2, No 4 (2014)
Publisher : Universitas Sumatera Utara

Objective of this research is studied of mineral substances and sea water effect on physico-chemicalproperties of highland peat. It was conducted at highland peat in Hutabagasan, Dolok SanggulSub – district Humbang Hasundutan Regency, North Sumatera. This research used non – factorialrandomized block design with four treatments those are G0 (Control), G1 (5kgs Volcanic sand), G2(5kgs Volcanic sand + 2,5L Sea water), G3 (5kgs Volcanic sand + 1kg Zeolite + 2,5L Sea water)and 3 replicants. The results showed that application of Volcanic sand (G1) significantly increasingon soil base saturation. Addition of sea water with volcanic sand and volcanic sand + zeolite (G2dan G3) significantly increasing on soil electric conductivity, exchangeable sodium, exchangeablemagnesium but decrease exchangeable calsium, and base saturation. Zeolite has a role as buffer ofsoil pH, soil electric conductivity and bulk dencity. The Application of all ameliorants have notpositive influence on the growth of rice plant and even decrease number of vegetative tillers.Keyword: Volcanic sand, Zeolite, Sea water, Highland Peat soil, Rice.

Evaluasi Kesesuaian Lahan Kabupaten Dairi Untuk Tanaman Kopi Robusta (Coffea robusta Lindl.) Muhammad Nazarul Yanis; Hardy Guchi; Mariani Sembiring
Jurnal Agroekoteknologi Vol 2, No 4 (2014)
Publisher : Universitas Sumatera Utara

This research purposed to evaluate the suitability of land for cultivation of robusta coffee in Dairiwith altitude at 400 - 1700 m above sea level . This research started from May 2013 to November2013. The research conducted by taking a sample soil based by method free survey grid with detailof survey level and then analyzed on the laboratory and land evaluation performed by the matchingmethod is based on plants needed with properties owned by land on any limiting factors. Theparameters observed in the field are soil depth, drainage, slope, the dangers of erosion, the dangersof flood, the rock surface and laboratory parameters analyzed include physical properties, textureand chemical properties of the soil pH, soil cation exchanges capacity, base saturation, C-organic,and soil salinity. The results showed that the actual land suitability classes for sample 1 is S2rc,nr,sample 2 is S3nr, sample 3 is S2oa,rc,nr,eh, sample 4 is S3nr,eh, sample 5 is S3nr, sample 6 is S3nr,sample 7 is Nrc, sample 8 is S3nr, sample 9 is S3tc,rc,nr, sample 10 is S3tc, sample 11 is S3nr,sample 12 is S3tc,oa,rc,nr, sample 13 is S3tc,nr, sample 14 is S3tc,rc, sample 15 is S3tc,nr,uh, andsample 16 is Nrc. Potential land suitability classes for sample 1 is S2rc, sample 2 is S2rc,nr, sample3 is S2rc, sample 4 is S2rc,nr,eh, sample 5 is S2rc,nr, sample 6 is S3rc,nr, sample 7 is Nrc, sample 8is S2rc,nr, sample 9 is S3tc,rc, sample 10 is S3tc, sample 11 is S2rc,nr, sample 12 is S3tc,rc, sample13 is S3tc, sample 14 is S3tc,rc, sample 15 is S3tc, and sample 16 is Nrc.Keywords : Land Evaluation, Dairi Regency, Robusta Coffe

Kajian Kesuburan Tanah di Desa Sihiong, Sinar Sabungan dan Lumban Lobu Kecamatan Bonatua Lunasi Kabupaten Toba Samosir Rino P. C. Purba; Bintang Sitorus; Mariani Sembiring
Jurnal Agroekoteknologi Vol 2, No 4 (2014)
Publisher : Universitas Sumatera Utara

This study aims to examine the fertility of the soil in the Sihiong Village, Sinar Sabungan Villageand Lumban Lobu Village, Bonatua Lunasi Subdistricts, Toba Samosir District. This research wasconducted in Sihiong Village, Sinar Sabungan Village and Lumban Lobu Village, SubdistrictsBonatua Lunasi, District Toba Samosir and Laboratory analysis of samples carried out in Researchand Technology, Faculty of Agriculture, University of North Sumatra. The method used in thisstudy is a survey method to make observations on the soil profile and on each layer of the soilhorizon to compare the soil fertility.The soil in the village Sihiong have a somewhat acidic soil pH,organic matter content is moderate, moderate cation exchange capacity capability, very low basesaturation while high levels of total soil ferrum. The soil in the Village Sinar Sabungan have acidicsoil pH, organic matter content is moderate, the ability of the cation exchange capacity of themedium, which is very low base saturation while high levels of total soil ferrum. The soil fertility inthe village of Lumban Lobu have acidic soil pH, organic matter content is moderate, the ability ofthe cation exchange capacity of the medium, which is very low base saturation while high levels oftotal soil ferrum.Keyword: Sihiong village soil profile, Sinar Sabungan village soil profile, Lumban Lobu villagesoil profile

Co-Authors Abdul Rauf Abdul Rauf Ade Ine Imansari Agustini, Fenny Alfredo Sitorus Alida Lubis Amos Simanungkalit Andi Andi Armando Septian Simbolon Armando Septian Simbolon Aslan Pasaribu Asmarlaili S. Hanafiah asmarlaili sahar hanafiah Beatrix I. L. J. Sinaga Benny Hidayat Benny Hidayat Bintang Sitorus Bintang Sitorus Budi Ananda Pratama Budianto, Rhiki Cynthia Simanjuntak Damanik, Revandy Damanik, Revandy I.M Danu Syahputra Lubis Deni Elfiati Deni Elfiati Edi Sigit Sutarta Edi Sigit Sutarta Eko Andreas Sihite Fauzi Fauzi Githa Noviana Guntoro Guntoro . Hardy Guchi Hendrik Dharmansyah Imam Ramadhan Intan Safitri Jamila Jamilah Jamilah Jamilah Jul Bahori Panggabean Julpan Lynneus Sitohang Lady Sarah M.M.B. Damanik Manullang, Yedija Mardiana Wahyuni Mardiana Wahyuni@gmail.com Marta Ritonga Meilissa Damayanti Lumban Gaol Muhammad Maulana Ghifari Muhammad Nazarul Yanis Muhammad Yusuf Dibisono Mukhlis Mukhlis Muklis Muklis Ni Komang Sri Lumbung Artha Wardani Nofriyanto Pakolo Nur Ulina Warnisyah S Sebayang, Nur Ulina Warnisyah S Posma Marbun Putra, P. A. S. Putu Oka Samirana rahmayanti rahmayanti Raja Forman Barasa Razali Ricky Elmando Saragih Ridwandi Ridwandi Rino P. C. Purba Rizky Dharmawan Margolang, Rizky Dharmawan Margolang, Ropikoh Hasibuan Sakiah Sakiah Sakiah Sakiah Sarifuddin Sarifuddin Sitohang, Julpan Lynneus Sitorus Sitorus Supriadi Supriadi Susianti Susianti Marbun T Sabrina T Sabrina T. Sabrina Tengku Sabrina Tengku Sabrina Tioner Purba Tosuko Utomo Triani, Agus vijay sitanggang Viky Fatmala Wahyuni, Mardiana Yaya Hasanah Yopie Priest Aulia Sinaga yudi sudarno sihombing Zoel Hani Hasibuan Zulkifli Nasution Zulkifli Nasution

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