bluuebunny/crossref_metadata_2025 huggingface dataset:
How to implement the basic educational program based on the three requirements of the Federal State Educational Standard
Authors: Abdurazakov M. M. , Zenkina S. V. , Nimatulaev M. M.
Published: December 2019

The article makes an attempt to comprehend the main points presented in the works of the Academician of the Russian Academy of Education, Doctor of Sciences (Education), Professor Alexander A. Kuznetsov, devoted to the introduction of the FSES of second generation in schools’ practice and the role of a teacher in the context of the introduction of the FSES. Particular attention is paid to such issues as: the development of the basic educational program, which is considered as the basis for the organization of the educational process; educational program evaluation; the role and importance of the explanatory note of the basic educational program; the main methodological idea of the work educational program on the subject; content of information educational environment; textbook, including electronic, as part of information educational environment. The analysis of the problems of the implementation of the FSES of second generation given in the article will be useful to teachers, methodologists and other pedagogical staff to improve the educational process both at school and at a pedagogical university when teaching future teachers.
DIDACTICS OF USING INTELLIGENT CONTROL SYSTEMS OF THE INTERNET OF THINGS IN THE PROJECT ACTIVITY OF STUDENTS
Authors: Shevchuk M. V. , Shevchenko V. G. , Borodyanskiy I. A.
Published: December 2019

The article discusses the issues of teaching the basics of intelligent control systems of the Internet of Things in a school informatics course using modern information and communication technologies. Methodical recommendations for training on this theme in the elective course "The basics of intelligent control systems" using smart devices for smart home and the Internet of Things (Arduino, Raspberry Pi) are given.
Determination of Common Pharmaceutical Adulterants in Herbal Medicinal Products Used in the Treatment of Opioid Addiction
Authors: Shiri-Ghaleh Vida , Moradi Mehrdad , Soltaninejad Kambiz
Published: December 2019

Background: Opioid addiction is a serious and growing global concern. Recently, herbal medicine has been popular for the treatment of opioid abusers worldwide. Unfortunately, the adulteration of herbal remedies with undeclared synthetic pharmaceuticals has been reported. In Iran, there are few reports on the adulteration of herbal remedies by synthetic pharmaceuticals sold as opioid addiction treatment. The aim of this study was to analyze herbal products used in opioid addiction treatment for the identification of synthetic pharmaceuticals as adulterants in the remedies.Methods: Forty commonly-used handmade herbal products for the treatment of opioid addiction were collected from herbal shops in Kermanshah (western area of Iran). After organoleptic examinations, the samples were prepared and analyzed by high-performance liquid chromatography and gas chromatography-mass spectrometry for detecting probable synthetic pharmaceutical adulterants.Results: The chromatographic analysis of the samples showed that 90% of the products had at least one undeclared pharmaceutical ingredient as an adulterant. The majority of the samples (n=19, 47.5%) had only one undeclared pharmaceutical. Diphenoxylate (n=24, 39.3%), tramadol (n=16, 26.2), methadone (n=8, 13.2%), and the combination of these drugs were reported as common adulterants. We detected the presence of buprenorphine and sildenafil as adulterating agents in the herbal formulations for the first time.Conclusion: According to the presence of undeclared synthetic pharmaceuticals in opioid addiction herbal products, as well as their threats to public health, awareness, in this case, is necessary.
ANALISIS FINANSIAL PEMANENAN KAYU TEKNIK REDUCED IMPACT LOGGING MELALUI SKEMA REDD+, KALIMANTAN UTARA
Authors: Muhdi  , Matangaran Juang Rata
Published: December 2019

The research was done at a natural tropical forest of PT Inhutani II, East Kalimantan. The objectivesof the research were to study the carbon (C) stock in the natural tropical forest after conventional andreduced impact logging (RIL) and to get the effectivity of RIL based on carbon stock, financial andenvironmental aspects. The effect of conventional and RIL on the environment and carbon stock in theplots was studied using the data of three plots with each size 100 m x 100 m. The plots are placedbased on purposive sampling at landing, main skid trail, and branch skid trails, respectively. Cstocks are counted by allometric equations and C economics by the economic acceptance of REDD.Economic value of RIL was IDR 1,604,518,900,- ha-1. Based on financial analysis showed that RILwas feasible and profitable at a rate of interest 16 %.
REMEDIASI TANAH TERCEMAR LOGAM BERAT DENGAN MENGGUNAKAN BIOCHAR
Authors: Hidayat Benny
Published: December 2019

Pembangunan industri dan urbanisasi selain dapat meningkatkan kesejahteraan manusia, tetapi juga memberikan efek negatif kepada lingkungan yaitu menghasilkan limbah dalam jumlah yang sangat besar, dan hal ini akan menjadi masalah yang serius bila tidak tangani dengan segera. Penangangan limbah pun masih belum di lakukan dengan serius dan bertanggung jawab sehingga sering dilaporkan adanya lahan yang tercemar akan limbah khususnya limbah logam berat. Logam- logam berat merupakan unsur yang tidak biodegradable sehingga limbah- limbah yang mengandung logam berat bila tertumpah ke lingkungan sedikit demi sedikit akan terakumulasi pada tanah dan air, bila ketersediaanya meningkat akan di serap oleh tanaman dan akan memberikan efek negative kepada kehidupan manusia. Banyak usaha yang telah dilakukan dalam menangani pencemaran logam berat ini dan pemberian biochar merupakan solusi yang sangat menjanjikan, karena biochar memiliki potensi dengan luas permukaan yang besar, morfologi yang sangat porous serta gugus fungsionalnya yang berpotensi untuk mengurangi bioavailabilitas dan pelindian logam berat melalui adsorpsi dan reaksi fisikokimia lainnya dan juga dapat meningkatkan kesuburan tanah dengan perbaikan sifat sifat tanah. Biochar merupakan bahan basa yang dapat meningkatkan pH tanah dan berkontribusi terhadap stabilisasi logam berat. Aplikasi biochar untuk perbaikan dari tanah yang tercemar logam berat dapat memberikan solusi baru untuk masalah polusi tanah. Tulisan ini memberikan gambaran tentang pemanfaatan biochar dalam mengurangi mobilitas dan bioavailibiltas logam berat pada tanah tercemar
UJI TOLERANSI BEBERAPA VARIETAS PADI ( Oryza sativa L. ) TERHADAP NAUNGAN
Authors: Alridiwirsah  , Hanum Hamidah , Harahap Erwin M. , Y Muchtar
Published: December 2019

Penelitian ini bertujuan untuk mengetahui uji toleransi beberapa varietas padi (Oriza sativa L) terhadap variasi intensitas penyinaran. Penelitian ini dilaksanakan bulan November 2014 sampai dengan bulan Februari 2015. diKebun Percobaan Pasar Miring, Balai Pengkajian Teknologi Pertanian (BPTP) Sumatera Utara. Jl. Raya-Galang Km 8,2 Lubuk Pakam, Kec. Pagar Merbau, Kab. Deli Serdang, Sumatera Utara. Rancangan yang digunakan dalam penelitian adalah Rancangan Petak Terbagi (RPT) dengan 2 faktor, yaitu: yang pertama faktor Naungan (N) sebagai petak utama dengan 3 taraf yaitu: N0 = tanpa naungan (100% intensitas penyinaran), N1= dinaungi 25% (75% intensitas penyinaran), N2 = dinaungi 50% (50% intensitas penyinaran). Yang kedua faktor varietas padi (V) sebagai anak petak dengan 5 taraf yaitu : V1= varietas Sidenuk, V2= varietas Ciherang, V3= varietas Inpari 10, V4= varietas Inpari 30 dan V5= varietas Mugibat. Jumlah kombinasi perlakuan 15 kombinasi yang diulang sebayak 3 kali menghasilkan 45 satuan percobaan, jumlah tanaman per plot 40 tanaman dengan 10 tanaman sampel, jumlah tanaman keseluruhan adalah 1800 tanaman dengan jumlah sampel seluruhnya 450 tanaman. Hasil penelitian menunjukkan bahwa perlakuan intensitas penyinaran (naungan) berpengaruh nyata terhadap parameter tinggi tanaman 14 MST, jumlah anakan, jumlah anakan produktif, jumlah gabah berisi per malai, berat gabah kering per plot dan berat gabah kering per Ha. Sedangkan parameter tinggi tanaman 2, 4 dan 6 MST, panjang malai, jumlah gabah per malai, jumlah gabah hampa per malai, berat gabah 1000 biji, kandungan klorofil A, kandungan klorofil B, kandungan klorofil Total tidak berpengaruh yang nyata. Pada perlakuan varietas berpengaruh nyata terhadap parameter tinggi tanaman, jumlah anakan, jumlah anakan produktif, jumlah gabah per malai, jumlah gabah berisi per malai, sedangkan terhadap panjang malai, jumlah gabah hampa per malai, berat gabah 1000 biji, kandungan klorofil A, kandungan klorofil B, kandungan klorofil Total, berat gabah kering per plot, berat gabah kering per Ha, penggunaan varietas tidak memberikan perbedaan yang nyata. Interaksi varietas dan intensitas penyinaran memberi pengaruh yang nyata terhadap jumlah anakan dan jumlah anakan produktif. Sedangkan parameter tinggi tanaman, jumlah gabah per malai, jumlah gabah berisi per malai, panjang malai, jumlah gabah hampa per malai, kandungan klorofil A, kandungan klorofil B, kandungan klorofil Total, berat gabah 1000 butir, berat gabah kering per plot dan berat gabah kering per Ha tidak memberikan perbedaan yang nyata.
EVALUASI KEMAMPUAN LAHAN MARGINAL DESA SIHIONG BONATUA LUNASI TOBASA UNTUK TANAMAN ANGGUR (Vitis vinifera L.) DAN JAMBU BIJI (Psidium guajava L.)
Authors: Bintang  , Supriadi  , Sembiring Mariani
Published: December 2019

Penelitian bertujuan untuk mengetahui kemampuan lahan marjinal di Desa Sihiong Kecamatan Bonatua Lunasi Kabupaten Tobasa mendukung tanaman anggur (Vitis vinifera L.) dan jambu biji (Psidium guajava L.), dimulai tahun 2012-2014 menggunakan metoda survey, dengan dua tahapan yakni mengklasifikasikan kemampuan lahan di Sihiong dan mengevaluasi kesesuaian lahan terhadap tanaman anggur dan jambu biji. Data primer dari lapangan adalah kemiringan lereng, erosi, solum, drainase, singkapan batuan dan bahaya banjir/genangan. Analisis properti tanah (tekstur, permeabiltas, bulk density, salinitas, bahan organik, pH, Kapasitas Tukar Kation, Kejenuhan Basa) dilakukan di laboratorium Riset dan Teknologi Fakultas Pertanian USU Medan. Hasil penelitian menunjukkan bahwa lahan daerah Sihiong termasuk kelas III dengan kemampuan lahan aktual kelas III(es). Upaya perbaikan dapat dilakukan untuk mengatasi erosi dengan membuat teras di lahan sedangkan tekstur tanah Lempung Berpasir (t4) tidak dapat dirubah. Dengan adanya perbaikan maka kemampuan lahan potensial Sihiong menjadi kelas III(s). Kemampuan lahan di Desa Sihiong dapat mendukung tanaman Tanaman Anggur (Vitis vinifera L.) pada kesesuaian lahan aktual terendah S3 (eh) dan upaya perbaikan akan meningkatkan kelas potensial menjadi S2 (tc,wa) dengan faktor pembatas tc,wa (temperatur dan ketersediaan air/lama masa kering) tidakdapat/sulit diperbaiki. Kesesuaian untuk tanaman jambu biji (Psidium guajava L.) berada pada kelas S3 (nr,eh) dengan faktor pembatas retensi hara dan bahaya erosi. Alternatif perbaikan dengan pemberian bahan organik yang diperkaya mineral basa dapat meningkatkan kelas kesesuaian lahan potensial menjadi S2 (tc) dengan faktor pembatas tc (temperatur) yang sulit diperbaiki.
DETERMINATION TYPE OF ALLOPHANE ON ANDISOL IN DOLAT RAKYAT VILLAGE TIGA PANAH DISTRICT, REGENCY OF KARO
Authors: Simamora Jupri , Marpaung Purba , Lubis Alida
Published: December 2019

The aim of the research was to determinate the type of Allophane minerals by means of Thermogram and to know the type of Allophane minerals with Allophane–Organic Matter relations. The research was done in Dolat Rakyat villages, District of Tiga Panah Karo Regency, In Soil Fertility Laboratory University of North Sumatera, and College of Chemical Industry (PTKI), Medan in June - October 2014. Soil type is Andisol. The result of the research in Dolat Rakyat Village Tiga Panah District, Regency of Karo Thermogram interpretation showed that type of Allophane minerals Andisol that is Allophane B. Allophane-Organic Matter relations showed that type of Allophane minerals is Allophane B with positive relations between Allophane-Humic Acid; negative relations between Allophane-Fulvic Acid, and Allophane-Humic Acid+Fulvic Acid.
BENIH KELAPA SAWIT (Elaeis guineensis Jacq.) DXP SOCFINDO MT GANO MODERAT TAHAN GANODERMA BONINENSE
Authors: Syahputra Indra , Purba Agustiaman
Published: December 2019

Banyak perkebunan kelapa sawit mengalami kerugian karena penyakit busuk batang bawah, yang disebabkan oleh Ganoderma boninense, yaitu jamur yang menyebabkan kematian pada tanaman. Praktek kultur teknis agaronomis dan pengelolaan fitosanitari dapat mengurangi dampak penyakit namun harus sejalan dengan penggunaan bahan tanaman yang tahan terhadap G. boninense. Ketahanan total tanaman-tanaman terhadap jamur belum ada dilaporkan, namun banyak contoh yang sudah diamati, termasuk kelapa sawit (Durand-Gasselin et al, 2014).Kelapa sawit, merupakan tanaman yang memiliki arti penting secara ekonomi, yang merupakan salah satu sumber minyak nabati penting di dunia dan sebagai bahan bakar biodiesel yang baik. Namun saat ini, kelapa sawit menghadapi masalah terhadap serangan penyakit. Banyak penelitian yang telah dilakukan, menyatakan bahwa Ganoderma boninense merupakan patogen utama penyebab penyakit yang menyerang kelapa sawit, bahkan sampai tingkat mematikan (Hushiarian et al, 2013). Ketahanan genetis terhadap penyakit busuk pangkal batang merupakan komponen utama dalam strategi pengendalian penyakit tersebut pada tanaman kelapa sawit. Deteksi awal pada tingkat ketahanan atau kerentanan adalah hal yang sangat penting untuk pemuliaan dan kesinambungan tanaman kelapa sawit khususnya di Asia Tenggara. Screening test berbagai progeni kelapa sawit telah dikembangkan melalui pertukaran bahan tanaman antara PT PP London Sumatera dan PT Socfin Indonesia (Breton et al, 2008).
PEMANFAATAN NEMATODA ENTOMOPATOGEN STEINERNEMA SP. ISOLAT LOKAL TERHADAP MORTALITAS PENGGEREK BUAH KOPI, H. HAMPEI FERR. DI LAPANGAN
Authors: Siahaan Ida Roma Tio Uli , Tobing Maryani Cyccu , Lisnawita
Published: December 2019

Potensi nematoda entomopatogen Steinernema sp. terhadap penggerek buah kopi, Hypothenemus hampei di Sumatera Utara belum pernah dilaporkan. Untuk itu telah dilakukan uji mortalitas Steinernema sp. isolat lokal terhadap H. hampei di lapangan. Penelitian bertujuan untuk mendapatkan konsentrasi Steinernema sp. isolat lokal yang tepat terhadap H. hampei di lapangan. Penelitian dilaksanakan pada Bulan April 2015 di kebun kopi petani di Kecamatan Habinsaran Kebupaten Toba Samosir Provinsi Sumatera Utara. Perlakuan yang dicobakan adalah kerapatan nematoda dengan tingkat konsentrasi 5000, 5500, 6000, 6500 ji/ml air steril dan kontrol (tanpa perlakuan). Aplikasi dilakukan dengan menyemprotkan suspensi ke buah-buah kopi matang yang terserang H. hampei. Perbanyakan nematoda dilakukan secara in vivo menggunakan ulat hongkong (Tenebrio molitor). Hasil penelitian menunjukkan bahwa mortalitas larva H. hampei tertinggi terdapat pada perlakuan 6500 ji/ml air steril sebesar 33,13, 33,29 dan 39,53 %. Mortalitas H. hampei meningkat seiring dengan bertambahnya kerapatan nematoda.
EVALUASI KESESUAIAN LAHAN UNTUK TANAMAN LAHAN SAWAH DI KECAMATAN HAMPARAN PERAK KABUPATEN DELI
Authors: Nora Silvia , Rauf Abdul , Elfiati Deni
Published: December 2019

Kecamatan Hamparan Perak Kabupaten Deli Serdang memiliki luas lahan pertanian ± 11.046 ha atau 48, 9 % dari luas Kecamatan ini, dimana seluas 7.048 ha adalah lahan sawah yang potensial namun belum dimanfaatkan secara optimal. Berdasarkan UU No 41 tahun 2009 bahwa perencanaan pengembangan lahan pertanian pangan berkelanjutan harus berdasarkan pada kriteria kesesuaian lahan yang dapa dilakukan dengan dukungan penelitian. Penelitian ini bertujuan untuk mengevaluasi karakteristik tingkat kesesuaian lahan sawah dan lahan kering di Kecamatan Hamparan Perak Kabupaten Deli Serdang, untuk menganalisis usaha–usaha perbaikan yang perlu dilakukan dalam meningkatkan produktivitas tanaman dan untuk membuat peta kesesuaian lahan aktual dan kesesuaian lahan potensial tanaman padi sawah dan beberapa tanaman lahan kering di Kecamatan Hamparan Perak Kabupaten Deli Serdang. Metode analisisnya adalah dengan metode membandingkan (matching) menurut FAO. pemilihan satuan unit lahan berdasarkan peta tanah yang terdiri dari 12 titik bor dan 6 lobang profil. Hasil penelitian menunjukkan bahwa tingkat kesesuaian lahan untuk tanaman padi sawah (Oryza sativa) adalah cukup sesuai (S2) seluas 14.093, 883 ha dan sesuai marginal (S3) seluas 17.347,141 ha. Untuk tanaman jagung (Zea mays) termasuk cukup sesuai (S2) seluas 19.391, 019 ha dan sesuai marginal (S3) seluas 12.050,005 ha. Untuk tanaman kedelai (Glicine max) termasuk sesuai marginal (S3) seluas 31.441,024 ha. Untuk tanaman ubi kayu (Manihot utilissima) termasuk kelas sesuai marginal (S3) seluas 31.441,024 ha. Untuk tanaman ubi jalar (Ipomea batatas) termasuk kelas sesuai marginal (S3) seluas 31.441,024 ha. Untuk tanaman sawo (Achras zapota) termasuk kelas cukup sesuai (S2) seluas 17.660,583 ha dan kelas sesuai marginal (S3) seluas 13.780,441 ha. Untuk tanaman mangga (Mangifera indica) termasuk kelas sesuai marginal (S3) seluas 31.441,024 ha. Untuk tanaman sukun (Astocarpus astilis) termasuk kelas cukup sesuai (S2) seluas 17.660,58 ha dan kelas sesuai marginal (S3) seluas 13.780,44 ha.
IDENTIFIKASI DAN ANTAGONISME JAMUR ENDOFIT TANAMAN TEBU (Saccharum officinarum L.) DALAM MENGHAMBAT Xanthomonas albilineans L. PENYEBAB PENYAKIT VASKULAR BAKTERI
Authors: Wahyuni Siti Hardianti , Hasanuddin  , Purba Edison
Published: December 2019

Identification and antagonism test endophytic fungi of sugarcane (Saccharum officinarum L.) to control bacterial vascular (Xanthomonas albilineans). This research aims to find potential endophytic fungi to against X. albilineans on sugarcane with use method autoclaving and membrane filtration sterilization. The research was conducted at Plant Disease Laboratory, Agroecotechnology Program Study, Faculty of Agriculture, University of Sumatera Utara, Medan from April to December 2014. It was done by using Completely Randomized Design (CRD) Factorial with three factor and three replications. The first factor were endophytic fungi 1, endophytic fungi 2. The second factor were dilution 10-1, 10-2, 10-3 dan 10-4. The three factor sterilization method were autoclaving and membrane filtration. The results showed all the endophytic fungi Aspergillus sp. better use membrane filtration sterilization and Hormiscium sp. better use autoclaving sterilization. Both fungi are potentially as biological agents to control bacterial vascular wilt on sugarcane. The best results obtained on Hormiscium sp.with diameter of inhibiting zone 9,04 mm with use autoclaving sterilization
Two Entomophagous Isolated From Sumatera Utara; Potential As Biocontrol Agent Againts Nematode
Authors: Hastuti Liana Dwi Sri , Nicklin Jane , Siregar Ameilia Zuliyanti
Published: December 2019

Two species of nematophagous fungi has been isolated from Sumatera Utara soil, with an aim of harnessing their potential in the biological control of plant parasitic nematodes or animal parasitic nematodes in Indonesia, especially in Sumatera Utara. Soil samples were collected from tobacco plantations, vegetable fields and ornamental plantings in the Berastagi area, and also from livestock in local farms and a dairy farm in Berastagi Area, Karo Regency. Soil also collected from un-cultivated area in Sibolangit National Park, Karo Regency. The pour method described by Larsen (1998) and the sprinkle method described by Jafee et al. (1996) were used to isolate the nematophagous fungi from soil. In this study the Chloramphenicol Water Agar Media has been used as culture media and Ceanorhabditis elegans has been used as bait. Two nematophagous fungi known as insect pathogens (entomophagous) have been isolated and determined as Lecanicillium lecanii and Paecilomyces fumosoroseus
TIPOLOGI RUMAH TANGGA TANI SEBAGAI TITIK MASUK PERTANIAN KONSERVASI: STUDI KASUS DI SEMI-RINGKAI TANZANIA
Authors: Banjarnahor Dina
Published: December 2019

Crop production in the semi-arid is limited by water shortage and less fertile soil. Conservation agriculture which is based on the principle of minimum tillage, permanent soil cover, and crop diversification has been introduced to Tanzanian local farmers for combating soil degradation and elevating food production. This study sought to explore the feasible entry point for integrating conservation agriculture into the local farms. This goal was achieved by recognizing the local farming system, identifying farm typology, and analyzing the circumstance and needs of different farm types. This study showed that conservation agriculture actually had potentials to reach different farm types. Nonetheless, the practical activities must satisfy the characteristics of each farm. While some farmers perceived hand-hoeing as the most feasible act others were fond of the use of animal-based minimum tillage equipment. Farmers rearing livestock found it difficult to leave crops residue to cover the soil while others were barely constrained. All farmers encountered one similar issue in practicing conservation agriculture: low biomass production to meet the demand of soil cover. Dealing and working with these circumstance and needs of different farm types are then essential in designing the locally appropriate conservation agriculture practices.
KERAGAAN MOLEKULAR AREN SUMATERA UTARA DAN AREN SULAWESI TENGGARA BERDASARKAN PRIMER OPD-20 DAN OPH-06
Authors: Putri Lollie Agustina P. , Giovana  , M. Basyuni  , Harahap Mahyuni K.
Published: December 2019

This study aims to determine patterns of kinship based on the molecular nature palm plant populations from North Sumatra (South Tapanuli) and Southeast Sulawesi using Random Amplified Polymorphic DNA markers (RAPD). Each of these ten individuals aren natural populations from North Sumatra and Southeast Sulawesi origin have been analyzed with the molecular-based primer OPD 2-20 and OPH-06. The results indicate the formation of three groups, namely the group 1 is formed of people from North Sumatra, group 3 is formed of sugar origin Southeast Sulawesi, while the second group is formed of two palm from North Sumatra and Southeast Sulawesi.
CUACA DAN KAITANNYA DENGAN EPIDEMI PENYAKIT PATIK (Cercospora nicotianae) PADA TEMBAKAU: Salah satu strategi menentukan waktu tanam tembakau cerutuTembakau merupakan tanaman ekspor yang memberikan pendapatan bagi petani dan negara merupakan instrumen yang
Authors: Tantawi Ahmad Rafiqi
Published: December 2019

Tembakau merupakan tanaman ekspor yang memberikan pendapatan bagi petani dan negara merupakan instrumen yang sangat penting dalam kebijakan moneter serta ekonomi banyak negara Di Indonesia, selama lebih satu abad, tembakau, terutama tembakau cerutu telah diproduksi di tiga pusat produksi, yakni tembakau deli (di sekitar Medan, Sumatera Utara), tembakau vorstenland di sekitar Klaten di bekas kerajaan (Vorstenlanden) Surakarta dan Yogyakarta di Jawa Tengah, dan tembakau besuki (di sekitar Jember) Jawa Timur . Salah satu kendala dalam budidaya tembakau cerutu adalah penyakit patik yang disebabkan oleh Cercospora nicotianae Ell. et Evn adanya patik pada tembakau cerutu akan menurunkan mutu keberadaannya dipengaruhi oleh factor cuaca. Daun tembakau pembalut cerutu haruslah benar-benar berkualitas, tidak terdapat bercak-bercak, tidak berlubang, warna merata, seragam, tipis, dan elastis, untuk perlu dibahas strategi penentuan waktu tanam untuk menghasilkan daun tembakau yang berkualitas.
PEMANFAATAN LAHAN GAMBUT UNTUK PERKEBUNAN KELAPA SAWIT DI AREAL HUTAN RAWA GAMBUT TRIPA PROVINSI ACEH : KENDALA DAN SOLUSI
Authors: Sufardi  , Manfarizah  , Khairullah
Published: December 2019

Areal Hutan Rawa Gambut Tripa (TPSF) Provinsi Aceh dengan luas areal 60.657,29 ha sebagian besar merupakan tanah gambut dengan ketebalan bervariasi dari 100 cm hingga >850 cm. Lebih dari 80% areal TPSF telah dimanfaatkan untuk perkebunan kelapa sawit dan kebun campuran. Hasil kajian lapangan dan laboratorium menunjukkan bahwa sekitar 52% areal TPSF ini tidak sesuai untuk kelapa sawit karena terdapat faktor pembatas penggunaan lahan yaitu ketebalan gambut >2 meter, tingkat kematangan fibrik, dan lahan yang mudah tergenang. Pemanfaatan lahan gambut untuk perkebunan kelapa sawit di areal TPSF telah memberikan perubahan pada aspek ekologis dan kualitas tanah. Kerusakan ekologis antara lain terjadinya subsidensi, menurunnya kemampuan mengikat air, memacu kehilangan C tanah dan mempercepat kematangan gambut. Perubahan karakteristik tanah meliputi meningkatnya BD (bulk density) dan KTK serta menurunkan C dan N tanah. Sifat kimia gambut yang telah lama digunakan untuk perkebunan kelapa sawit, kualitasnya lebih baik daripada gambut yang baru dibuka. Untuk mencegah terjadinya degradasi lahan, diperlukan upaya-upaya untuk rehabilitasi dan konservasi yaitu dengan mengatur sistem drainase (blocking canal) dan kedalaman air tanah untuk menghindari kebakaran bahan gambut serta menghambat emisi karbon yang berlebihan. Kendala keasaman tanah dan rendahnya kation basa dapat diatasi dengan penambahan amelioran dan pemupukan yang berimbang.
KAJIAN NAUNGAN, TARAF PUPUK UREA DAN VARIETAS KEDELAI (Glycine max L.) TERHADAP PERTUMBUHAN DAN PRODUKSI TANAMAN KEDELAI SEBAGAI TANAMAN SELA DI AREAL PERTANAMAN KELAPA SAWIT MENGHASILKAN
Authors: Asima Napitupulu
Published: December 2019

The aims of this research were to analyze morpo_physiology changing of soybean underthe oil palm area; determine the effect of shading and N fertilizer dosage on the growth and yieldof soybean under the oil palm area, and determine suitable soybean varieties that enablegrow and produce under oil palm. The experiment located in Ujung Labuan Village, DeliSerdang District. The experiment was arranged in Split-split Plot Design 3 x 4 x 3 with3 replication, with three factors observed: 1) shade level, consist of: under 4 years oldoil palm, under 6 years old oil palm, open area, 2) N dosage: 200 kg urea/ha, 150 kg/ha,100 kg urea/ha, 0 kg urea/ha, 3) soybean variety: Anjasmoro, Burangrang, andGrobogan. Plant height, leaf area, plant dry weight, and soybean production weredetermined. The result showed there were some significant effects of interaction factorsbetween oil-palm canopy shading, N dosage and soybean variety on growth and yield ofsoybean. The highest growth and production of soybean found in open areas. Between 4years old oil palm and 6-7 years old oil palm, soybean growth, and production areinsignificant different and lower than those on the opening area. N dosage makes somesignificant effects on growth and yield of soybean, which is usually nonsignificantbetween 150 kg Urea/ha or 200 kg Urea/ha. Meanwhile, soybean variety makes somesignificant effects. At the open area, burangrang make the highest growth and production byapplication of 200 kg urea/ha, but under oil palm, the highest production found atBurangrang under 4 years old oil palm and application of 200 kg urea/ha, followed byseveral treatments that are insignificantly different.
PERTUMBUHAN TANAMAN KELAPA SAWIT DI LAHAN PASANG SURUT
Authors: Winarna
Published: December 2019

Limitations of potential land for the palm oil industry in Indonesia led to the development ofmature oil palm plantations leads to marginal lands with various limiting factors. One ofthe marginal lands that could potentially as an alternative for palm oil development in the tidalwetlands. The potential of tidal land for oil palm cultivation is mainly related to the flattopography and water availability throughout the year to minimize the possibility ofwater deficit. However, there are some critical issues that become limiting for thedevelopment of oil palm plantations, which severely hampered drainage, high salinity,the potential content of pyrite, peat depth and maturity, as well as greater investment forinfrastructure development. Growth and productivity of oil palm trees in addition to tidalland affected by the improvement in the fertility rate are also influenced by watermanagement. The observation of vegetative ( leaf area ) of oil palm plantations age of 2years in a swamp area pitu ( pyrite 80-100 cm depth ) showed that the water managementin the water level of 20-40 cm had greater leaf area ( 2.93 m2 ) compared with watermanagement 0-20 cm ( 2.40 m2 ) and 40-60 cm ( 2.21 m2 ) below the ground surface.According to Winarna ( 2007), the productivity of oil palm plantations aged 10 years onacid sulfate soil in North Sumatra with water management and good pyrite can reach therange of 20-24 tonnes FFB /ha/year. The results of the observations made by Harahapand Siregar (2004 ) at the age of oil palm plantation in Betong Krawo 5-6 years ( depth of pyrite 50-100 cm ) with water management and pyrite are not maximized, which indicatesthat the low productivity range 10.86 - 12.70 tonnes FFB /ha/year.
KOLONI SEMUT Myopopone castanea SMITH (hymenoptera : formicidae) SEBAGAI PREDATOR Oryctes Rhinoceros L. (coleoptera: scarabaidae) PADA ONGGOKAN BATANG SAWIT DI LABORATORIUM
Authors: Susanti Rini , Bakti Darma , Marheni
Published: December 2019

Ants are one potential predator of O. rhinoceros L. (Coleoptera: Scarabaidae). The purpose of this study wasto determine the ants of colony Mypoponae castanea as predators of the palm stem borer O. rhinoceros(Coleoptera: Scarabaidae) on a pile of oil palm trunk in the laboratory. This research was conducted at theLaboratory of Pest Plant of the Faculty of Agriculture, University of Sumatra Utara, Medan (± 25 m abovesea level). This research was conducted in November 2014 to Agustus 2015. The results showed a colony ofM. castanea had one queen with 5-6 male ants and 60-70 worker ants in the laboratory.
PENGARUH PEMBERIAN BAHAN ORGANIK TERHADAP SIFAT KIMIA PADA TANAH SAWAH TERDEGRADASI DI KECAMATAN PANTAI LABU KABUPATEN DELI SERDANG
Authors: Alfarisi Salman , Elfiati Deni , Rauf Abdul
Published: December 2019

Organic fertilizers provide an advantage in increasing the growth and yield and can reduce the use of inorganic fertilizers. The study aims to analyze the land rehabilitation efforts relegated to improve the properties of the fields of chemistry, physics, and biology of the soil, with compare paddy soil conditions before and after rehabilitation. thereby increasing the productivity of rice in the District of Pantai Labu. The research was conducted in Durian, District, Pantai Labu, Deli Serdang, North Sumatra in April 2017 to July 2017. The study was arranged in a randomized block design (RAK) non-factorial experiment with five treatments and four replications. The treatments used are B0 = Control, B1 = 1.5%, B2 = 3%, B3 = 4.5%, B4 = 6%. The results showed that organic fertilizer can increase plant growth indicated by an increase in plant height. Organic fertilizers also increase the number of productive tillers, panicle length. Organic fertilizers also increase the number of grains per panicle and filled the grain.
Tanggap Pertumbuhan Bibit Tebu Merah (Saccharum officinarum L.) Asal Bud Set terhadap Pemangkasan dan Frekuensi Penyiraman
Authors: Hartanto Supriadi , Irsal  , Barus Asil
Published: December 2019

This research was conducted to determine the growth of red sugarcane seedling on pruning and frequency of watering. This research was conducted in the research field of Faculty of Agriculture University of Sumatera Utara (± 25 m asl) from June-October 2017 using Factorial Randomized Block Design with three replications. The first factor was pruning (control, 1, and 2 months/plant) as well as the second factor was the frequency of watering (1, 3, 5, and 7 days/plants). The variable observed were plant height, a number of leaves, stem diameter, a number of the tiller, shoot wet weight, root wet weight, and shoot-root ratio. The results showed that the frequency of watering treatment had a significant effect on the number of a leaf (4,6,8,10 and 12 weeks after plant), stem diameter (4,6,8,10 and 12 weeks after plant), shoot wet weight, and root wet weight. Pruning treatment had no significant effect on all variables observed. The interaction of both has no significant effect on all variables observed.
Biological of black bug Paraeuscosmetus pallicornis (Hemiptera: Lygaeidae) on two varieties of rice plants at laboratory
Authors: Nurhabibah  , Tobing Cyccu , Hasanuddin
Published: December 2019

The objective of the research was to study the biology of black bug Paraecosmitus palicornis insects on two varieties of rice at laboratory. The research was conducted at Plant Pest Laboratory of Agricultural Faculty University of Sumatera Utara, Medan from September to December 2017. The research used by descriptive method and complete randomized design with nine replications. The results showed that total life cycle on Mekongga varieties was ±27.1 days and a female laids ±41.56 eggs. Total life cycle on Mapan 05 varieties was ±26.2 days and female laids ± 12,55 eggs.
Pengaruh Aplikasi Alfatokoferol Terhadap Pertumbuhan dan Produksi Kedelai (Glycine Max (L). Merril) Di Tanah Salin
Authors: Suganda Heru , Rahmawati Nini , Irsal
Published: December 2019

Produksi kedelai di indonesia setiap tahun mengalami penurunan dan tidak dapat memenuhi kebutuhan dalam negri, salah satu penyebab utamanya yaitu semangkin sempitnya lahan pertanian. Untuk meningkatkan produksi kedelai di Indonesia dapat ditempuh dengan cara perluasan areal tanam, yaitu dengan memanfaatkan tanah yang kurang berpotensi salah satunya adalah tanah salin. Penelitan ini dilaksanakan di rumah plastik Fakultas Pertanian Universitas Sumatera Utara, Medan dengan ketinggian tempat + 25 meter di atas permukaan laut dari bulan Agustus 2017 sampai november 2017, menggunakan rancangan acak kelompok faktorial yaitu faktor I: genotip kedelai Anjasmoro X Grobogan, dan Grobogan X Grobogan, faktor II: pemberian konsentrasi alfa tokoferol dengan taraf tanpa alfa tokoferol, alfa tokoferol 250 ppm, alfa tokoferol 500 ppm, alfa tokoferol 750 ppm. berpengaruh nyata terhadap parameter tinggi tanaman, jumlah daun, cabang produktif, umur berbunga, diameter batang, jumlah polong berisi, umur panen, bobot 100 biji pertanaman
Respons Pertumbuhan Dua Varietas Padi Lokal dengan Beberapa Komposisi Kompos
Authors: Richo M Ryan , Hanum Chariani , Meiriani
Published: December 2019

Pengembangan padi lokal saat ini masih kurang mendapat perhatian karena produktivitasnya masih tergolong rendah dibandingkan dengan padi sawah. Padahal, varietas lokal memiliki adaptasi kesesuaian yang tinggi terhadap daerah tertentu, varietas lokal juga perlu dipertahankan dan dilestarikan sebagai kekayaan plasma nutfah, sekaligus sumber keragaman genetik. Salah satu alternatif untuk meningkatkan pertumbuhan dan produktivitas padi lokal adalah dengan pengembangan teknologi penggunaan kompos. Tujuan dari penelitian ini adalah untuk mempelajari pertumbuhan dan produksi dua varietas padi lokal dengan pemberian beberapa komposisi kompos. Untuk itu dilakukan penelitian di Desa Paya Bakung Kec. Hamparan Perak, Kab. Deli Serdang dengan ketinggian tempat ± 25 meter di atas permukaan laut pada bulan Maret hingga September 2016. Penelitian ini dilakukan dengan menggunakan rancangan acak kelompok faktorial (RAK) dengan 2 faktor. Faktor pertama adalah media tanam kompos dengan 5 taraf yaitu: tanpa pemberian kompos (0 kg/plot) ; kompos blotong 3,6 kg/plot; kompos TKKS 3,6 kg/plot; kompos blotong 3,6 kg/plot + kompos TKKS 3,6kg/plot; kompos blotong 7,2 kg/plot + kompos TKKS 3,6 kg/plot; kompos 3,6 kg/plot + kompos TKKS 7,2 kg/plot. Faktor II adalah varietas padi gogo, terdiri dari varietas Sikembiri dan Sigendek-gendek. Hasil penelitian menunjukkan bahwa masing-masing varietas memiliki perbedaan tinggi tanaman sementara perlakuan kompos nyata meningkatkan tinggi tanaman, dan jumlah anakan per rumpun. Kombinasi perlakuan media tanaman (blotong 7,2 kg/plot + TKKS 3,6 kg/plot) pada varietas Sikembiri dan Sigendek gendek menghasilkan rataaan tertinggi dari tinggi tanaman.
Respons Pertumbuhan dan Produksi Tanaman Jagung Manis Terhadap Aplikasi Biochar dan Pupuk Organik Cair
Authors: Simanjuntak Domas Mesiekiel , Rahmawati Nini , Sipayung Rosita
Published: December 2019

Penelitian ini dilaksanakan di lahan penelitian Balai Benih Induk Tanjung Selamat, jalan Pendidikan Kelurahan Tanjung Selamat, Kecamatan Medan Tuntungan, Medan pada ketinggian tempat ± 35 m dpl. Penelitian ini dilaksanakan pada bulan Oktober sampai dengan Desember 2016. Metode percobaan yang digunakan adalah Rancangan Acak Kelompok (RAK) faktorial dengan 2 faktor perlakuan yaitu dosis biochar yaitu kontrol, 5 ton/hektar, 10 ton/hektar, 15 ton/hektar dan konsentrasi pupuk organik cair yakni kontrol, 5 ml/liter air, 10 ml/liter air, 15 ml/liter air. Hasil penelitian menunjukkan bahwa perlakuan biochar berpengaruh nyata terhadap peubah amatan volume akar, produksi per sampel dan produksi per plot, perlakuan biochar terbaik ialah 15 ton/hektar.Perlakuan pupuk organik cair berpengaruh nyata terhadap peubah amatan luas daun, volume akar dan produksi per plot, perlakuan pupuk organik cair terbaik ialah 15 ml/liter air sedangkan interaksi antara perlakuan pupuk organik cair dan perlakuan biochar tidak berpengaruh nyata terhadap semua peubah amatan.
The Utilization Of Some Of Biochar To Retain N-Total In Inceptisols
Authors: Heryani Ulfa , Hidayat Benny , Mukhlis
Published: December 2019

Nitrogen is very important nutrient growth of plant but eassy lost from soil. The aim of this researc to get the best biochar feedstock in maintaining N-total in the Inceptisol soil. Theresearch was carried out in the laboratory using the method of experiment. This research was carried out with complete randomized design non factorial with the treatment without biochar (controls), and 4 types of biochar from palm empty fruit bunches, rice straw, rice husks and wood, is repeated four times. The observed parameters are pH H2O,CEC, & N-total ground. The results showed that the four types of biochar can increase the pH H2O, CEC, N-total ground. Loss of Nutrient N decreased significantly due to the granting of biochar palm empty fruit bunches. Absorption capacity of biochar to reduce leaching of N in the soil of inseptisol sorted from largest to smallest is biochar palm empty fruit bunches, rice husk, rice straw and wood.
Growth and Production Response of Varieties of Mung Beans (Vigna radiata L.) to Gibberellin Concentration in the Saline Field
Authors: Atika Rina , Bayu Eva Sartini , Kardhinata Emmy Harso
Published: December 2019

This study aims to determine the growth and production response of some mung bean varieties with the application of gibberellin at different concentrations in the saline field. This research was conducted at Hamparan Perak , District of Deli Serdang North Sumatera, Medan (± 3-9 m asl) from May - August 2017. The tretment was arranged by Randomized Block Design (RBD) with two factors, three mung green varieties (Vima-1, Vima-2, and Vima-3) and GA3 concentration (0 ppm, 100 ppm, 200 ppm). The results showed that there were significant diffrent among varieties on plant height, the number of pods per plant, and the diameter of the seed. Gibberellin concentration gives sinificant effect to the plant height in 3 and 5 week after pllanted, root volume, and seed diameter. The interaction between aplication gibberellins and varieties had a significant effect on the root volume.
Tanggap Pertumbuhan Bibit Kakao (Theobroma cacao L.) Terhadap Berbagai Komposisi Media Tanam dan Frekuensi Penyiraman
Authors: Lubis Muhammad Yusnan , Sipayung Rosita , Irsal
Published: December 2019

Pembibitan yang dilakukan secara besar-besaran seringkali dijumpai masalah ketersediaan jumlah air yang dapat disimpan pada media. Penelitian bertujuan untuk mengetahui pengaruh media dan frekuensi penyiraman terhadap pertumbuhan bibit kakao dan mencari media terbaik serta frekuensi penyiraman yang optimum.Penelitian ini dilakukan di lahan pertanian Fakultas Pertanian, Universitas Sumatera Utara, Medan (32 mdpl) pada bulan Juni sampai September 2017. Metode percobaan yang digunakan adalah Rancangan Acak Kelompok (RAK) faktorial dengan 2 faktor perlakuan yaitu media tanam yakni M0 (topsoil) , M1 (topsoil : pasir, 2 : 1) , M2 (topsoil : sekam padi, 2 : 1), dan M3 (topsoil : arang sekam, 2 : 1) dan frekuensi penyiraman yakni 1 (satu) hari sekali, 4 (empat) hari sekali, 7(tujuh) hari sekali, dan 10 (sepuluh) hari sekali. Parameter yang diamati adalah tinggi tanaman, jumlah daun, diameter batang, total luas daun, bobot segar tajuk, bobot segar akar, bobot kering tajuk, bobot kering akar dan rasio tajuk akar. Hasil penelitian menunjukkan bahwa perlakuan media tanam berpengaruh nyata terhadap parameter amatan tinggi tanaman, jumlah daun, bobot segar akar, bobot kering tajuk dan bobot kering akar. Perlakuan media tanam terbaik terdapat pada topsoil (M0), Perlakuan frekuensi penyiraman tidak berpengaruh nyata pada semua parameter amatan. Interaksi antara kedua perlakuan berpengaruh nyata terhadap parameter amatan bobot segar akar.
Test of effectiveness decompocers on some types of compost material
Authors: Pratama Budi Ananda , Sabrina Tengku , Sembiring Mariani
Published: December 2019

Organic residues resulting from agricultural activities are nutrients for plants, but must go through a process of decomposition by soil microorganisms called decomposers. This study aims to examine the effect of several types of decomposers on several types of compost materials. This research was conducted at university faculty of agriculture of North Sumatera. This research was conducted starting from November 2017 - January 2018. In this research the design used is factorial randomized block design consisting of 2 factors of treatment that is compost material (TKKS, bagasse, straw) and decomposer type comes from, (TKKS, Bagasse, straw). the results showed that the compost material derived from TKKS was compost material containing N-total 1.31%, K-total 0.880%, C-organic 34.02%, C / N 30.51% and total microbial 2.5 x 108 CFU, higher than other compost materials. Decomposers derived from TKKS are decomposers capable of lowering the C / N ratio lower than the decomposers derived from other materials of 26.59, with total K-content of 0.556%, higher than others, C-organic 23.79% lower than others , but the highest N-total content comes from straw material that is 0.94%. The interaction between the compost and the decomposer derived from the isolates reduced C-organic and C / N lower than the others, but the reaction from the original decomposer to the N-total content of the TKKS was higher at 1.24%, the lower bagasse, 1.10 % and higher straw is 0.72% and K-total compost from TKKS is 0.91%, bagasse 0.21% and straw lower is 0.22%.
Performance of Floating Raft Fertigation System on Water Spinach Plants (Ipomea reptans Poir.) Cultivation
Authors: Fadhlillah Rizal Hadyan , Dwiratna Sophia , Amaru Kharistya
Published: December 2019

The increase of human population impact to more land needed for residence and has an impact on the decreasing land for agriculture, especially in urban areas. One of solution for farming in urban areas is by utilizing rooftop farming by hydroponic cultivation. The hydroponic system that used in this research is floating raft system. This study aims to determine the performance of the floating raft fertigation system which includes the amount of energy consumption, water, nutrient solution, growth uniformity and yield productivity in water spinach cultivation using floating raft fertigation system for one period of growth. This research was carried out on the rooftop of the building of the Food Industry Technology Department of Padjadjaran University with descriptive analysis method. The parameters measured in this study were the amount of water consumption, nutrition and electrical energy from the floating raft fertigation system that was used and uniformity of the results of plant growth including plant height, root length and plant weight at harvest determined in this study, 16 days after transplanting. Result showed that water consumption for one time growth period water spinach was 300,63 liters; consumption of nutrients was 3860 ml and electricity consumption was 31,816 kW. The uniformity of water spinach plant results of the study was in the category of good. The efficiency of water use was 99.6 kg/m3 and plant productivity based on research results is 72.8 kg/m2.
Insecticide Activity Extract of Tinospra crispa Mixed With Cow Urine on Spodoptera litura in the Laboratory
Authors: Sari Putri Mustika , Wahyunita Henny , Yoesoep Adriansyah , Lisdayani  , Harahap Fitra S.
Published: December 2019

Armyworms (Spodoptera litura) become important pests in Indoensia that eat leaves compared to other pests because they are polyfag. S. litura can reduce productivity even crop failure. Therefore, it is necessary to do research on how to control S. litura effectively and environmentally friendly. This study aims to determine the effectiveness of brotowali extract (Tinospra crispa) as a botanical insecticide and obtain the right concentration of fruit extract, young leaves, and old Brotowali leaves to control the armyworm (litura Spodopter). This study used a Non Factorial Completely Randomized Design (RAL) with 6 treatments of various doses of brotowali extract mixed with cow urine and 4 replications. The results of the study showed that the administration of Brotowali + Urine Cattle extract with high doses (30 ml / jar) was able to increase the speed of death of the armyworm.
Latex Flow Pattterns Several of Clone with the Use of Plant Growth Regulator to Production
Authors: Koryati Try , Siregar Luthfi A. M.
Published: December 2019

Slow or fast flow of latex when tapped affects the height and low production of latex. The physiological nature of the latex flow illustrates the speed and resistance of the latex flow rate per unit time. The purpose of the study was to determine the pattern of the flow rate of latex several rubber clones with the use of growth regulators and their relation to the production of latex in the initial tapping. The study was carried out in the PTP-N I Kso PTP-N III Karang Inong plantation, East Aceh. The research was arranged based on three factors of Nested Design, namely Clone factors with five factors, IAA + Kinetin hormone factor 7 factors and Paklobutrazol factors there were 3 factors. Some research results show that the pattern of each clone is different from the rate of flow of latex. In general, the clones tested were PB 260, PB 330, and IRR 5 clones, which showed a sharp decrease in latex flow, except the PB 340 and IRR 107 were still stable. PB 340 clone has the highest latex flow rate of 3.00 ml / minute in the first 10 minutes combination of H1P0 treatment. In the 90th minute, PB 340 still flows latex in several combinations of treatments with a latex flow rate in treatment (H4P1) of about 2.55 ml / minutes with a higher latex volume of 30-70 minutes for the same treatment combination. The highest production of latex per plant was obtained from the IRR 107 (K4) clone with the administration of 500 ppm IAA + 60 ppm kinetic (H4) and the application of soil paklobutrazol (P1) (K4H4P1) of 59.99 g / p / s, followed by PB clones 340 (K3H4P1)) of 49.80 g / p / s. The lowest production of latex per plant was found in PB 330 (K2H0P0) clones of (4.98 g / p / s).
Effect of Activator on Levels of C, N, P and K Compost of Salak Sidimpuan Leaf Midrib
Authors: Amnah Rizky , Friska Meiliana
Published: December 2019

Salak Sidimpuan leaf midrib is abundant pruning waste. Salak Sidimpuan leaf midrib can becomposted containing a number of nutrients (carbon, Nitrogen, phosphorus, and potassium) for plantgrowth. To speed up the process of composting of salak leaf midrib can be done by giving a numberof activators. This study aims to see the effect of activator on the level of elements C, N, P and Kcompost of salak Sidimpuan leaf midribs. This study used a one-factor randomized block design with4 levels of treatment of activator, K0 = control, K1 = chopped midribs+cow manure fertilizer, K2 =chopped midribs+EM4, K3 = chopped midribs+cow manure fertilizer+EM4) with three replications.Data were analyzed with ANOVA and continued with DMRT test at 5% level if the F test showed areal effect. The results showed that the K2 with treatment chopped salak Sidimpuan leaf midrib andEM4 activator tended to give the best results in reducing the levels of C-organic and C/N ratio aswell as increasing total Nitrogen, total phosphorus and total potassium after composting comparedto other activator delivery treatments.