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Turnitin Checker and Peer Review An. Yayuk Purwaningrum

Agronomic Characteristics of Mustard ( Brassica juncea L.) on the Application of Fertilizer Solution and Flannel Size at Wick Hydroponic System

MARKHAINI1, INDRA GUNAWAN1, YAYUK PURWANINGRUM1, YENNI ASBUR*, RAHMI DWI HANDAYANI RAMBE1

1Islamic University of North Sumatera

ABSTRACT

The aimed of the study is to determine the agronomic characteristics of mustard cultivated hydroponically using wick system on the application of liquid fertilizer and flannel size. The research was conducted at screen house of the Faculty of Agriculture, Islamic University of North Sumatera, Medan as long as January-February 2016. The research is field experiments, using two-factor completely randomized design with three replications. The first factor is concentration of liquid fertilizer, consisted of 0.0 mL/L, 2.5 mL/L, 5.0 mL/L, and 7.5m L/L of water, and the second factor is widths of flannel cloth, consisted of 1 cm, 2 cm, and 3 cm. The results showed that concentration of liquid fertilizer at 7.5 mL/L of water and 1 cm of flannel has the highest plant height, leaf number, leaf area, knop diameter, and fresh weight. Based on the scatter plot, fresh weight is more influenced by the knop diameter than plant height, leaf number, and leaf area.

Keywords: liquid fertilizer, wick size, fresh weight, Brassica juncea

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POTENSI BEBERAPA GULMA SEBAGAI TANAMAN PENUTUP TANAH DI PERKEBUNAN KELAPA SAWIT MENGHASILKAN

POTENTIAL SEVERAL WEEDS AS COVER CROP IN MATURE OIL PALM PLANTATION

Yenni Asbur *, Rahmi Dwi Handayani Rambe, Yayuk Purwaningrum, dan Dedi Kusbiantoro

Abstrak

Penggunaan tanaman penutup tanah pada perkebunan kelapa sawit merupakan salah satu teknik konservasi tanah secara vegetatif, serta Best Management Practice dalam usaha perkebunan kelapa sawit. Penelitian ini bertujuan untuk mempelajari potensi beberapa gulma sebagai tanaman penutup tanah di perkebunan kelapa sawit menghasilkan. Penelitian dilaksanakan di perkebunan kelapa sawit rakyat umur 20 tahun di Desa Namorambe Kecamatan Namorambe, Kabupaten Deli Serdang, Sumatera Utara dari Maret sampai Juni 2017. Penelitian menggunakan rancangan acak kelompok satu faktor, tiga ulangan dengan beberapa jenis gulma sebagai perlakuan, yaitu Nephrolepis biserrata, Asystasia gangetica, Paspalum conjugatum, dan Ageratum conyzoides. Hasil penelitian menunjukkan bahwa N. biserrata, A. gangetica, P. conjugatum, dan A. conyzoides berpotensi digunakan sebagai tanaman penutup tanah di perkebunan kelapa sawit menghasilkan karena gulma-gulma tersebut mudah diperbanyak dan cepat menutup lahan (8-12 MST), mampu menyumbang unsur hara N, P, K ke tanah, serta mampu memperbaiki sifat kimia tanah melalui daur ulang hara yang diserap oleh gulmagulma tersebut ke tanah.

Kata kunci : gulma, tanaman penutup tanah, perkebunan kelapa sawit

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STUDY OF GROWTH AND YIELD OF WATERMELON WITH AWARDING OF THE MULCH AND GOAT MANURE IN THE PADDY FIELDS OF NORTH SUMATERA, INDONESIA

Yayuk Purwaningrum, Syamsafitri, Yenni Asbur*, Rahmi Dwi Handayani Rambe, Mahyuddin, Arif Anwar and Saur Ernawati Manik

Department of Agrotechnology, Faculty of Agriculture, University Islam Sumatera Utara, Jalan Karya Wisata Gedung Johor, Medan 20144, Indonesia.

ABSTRACT

Create free trade between countries in the impact of globalization of trade competition tighter, especially on horticulture. The study aimed to identify the type of mulch and dosage of manure for promoting growth and watermelon in the paddy fields that have been carried out in Paya Itik Dusun 3 Village, Galang, Deli Serdang, North Sumatera on Februari to April 2016. The research was a field experiment using a split plot design in a randomized block design of two factor three replications. Mulch as the main plot consists of: mulch straw, silverblack polyethylene, black-silver polyethylene, and goat manure dosage as the sub plot consisting of: 0 t/Ha, 10 t/Ha, 20 t/Ha, and 30 t/Ha. The results showed that silver-black polyethylene mulch and manure dosage of 30 t/Ha resulted in plant length, number of productive internode, and fruit weight per plot of the highest watermelon plants. The silver-black polyethylene mulch treatment is also able to suppress the attack of pests and diseases of watermelon plants, and is able to suppress weed growth.

KEYWORDS: Watermelon, straw mulch, polyethylene mulch, inventory pest and diseases.

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Exploitation System Based on Leaves Development Dynamic of Clones BPM 1 in North Sumatera, Indonesia

Yayuk Purwaningrum1, Yenni Asbur*, Chairani Hanum2, THS Siregar3

1,2Islamic University of North Sumatera 3Sumatera Utara University, North Sumatera 4Indonesian Rubber Research Institute Sungai Putih, North Sumatera, Indonesia

ABSTRACT

Latex Production of rubber is highly influenced by applied exploitation system and annual rainfall pattern. Different annual rainfall pattern causes latex peak production follow the dynamics of leaves development. This research aims to determine the effect of physiology and latex production of clone BPM 1 on applied exploitation system according to the dynamic of leaves development. This research was conducted at two locations, namely Indonesian Rubber Research Institute Sungai Putih, North Sumatera and PT. Perkebunan Nusantara III, North Sumatra Regency from August 2014 to July 2015. The research uses Split Block Design in a randomized complete block design with three replications and two factors. The main plot is exploitation system, comprising of two levels namely downward tapping on quarter-spiral (S/4d3), and upward tapping on quarter-spiral (S/4Ud3). The subplots are stimulant application, consisting of four levels namely ethephon 2.5% applied once for 15 days (ET/15d), gas stimulant applied once for 9 days (ETG/9d), gas stimulant applied once for 18 days (ETG/18d), and gas stimulant applied once for 27 days (ETG/27D). The results show that annual rainfall patterns affect the dynamic of leaves development and divide the development phase of the rubber leaves into leaf fall, leaf flush and leaf mature. The optimum exploitation systems of clones BPM 1 to increase latex production is upward tapping on quarter-spiral (S/4U), application of stimulant with ethephon (ET) at leaf fall, and gas stimulants (ETG) at leaf flush and leaf mature.

Keywords : rainfall, leaf fall, leaf flush, leaf mature, sucrose, inorganic phosphate, thiol

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Relationship between Latex Production and Physiology of Rubber Clone Pb 260

Yayuk Purwaningrum*, Yenni Asbur

Faculty of Agriculture, Universitas Islam Sumatera Utara, Medan, Indonesia *Corresponding author E-mail: yayuk.purwaningrum@fp.uisu.ac.id

Abstract

Dominant physiological characteristics of latex in Latex formation are sucrose content, inorganic phosphate, and thiol levels. Relationship between latex physiology character and factors influencing production of latex was examined in 10 years old of clone PB 260. This research aims to study and obtain data on latex physiological characteristics which considered relate to production and find out physiological characters that have significant PDFcorrelation and direct effect on rubber production. The research site is Sei Putih Farm, PT. Perkebunan Nusantara III is Regency of Deli Serdang, North Sumatra, Indonesia. Clone PB 260 with planting space 2.5 m x 5 m was used as plant material in this study. Every treatment is used 75 trees with girth 65 cm – 70 cm. Based on statistical analysis, in May, June and July, sucrose levels had positive effect on latex production, while Pi and thiol had negative relationship, except in June Pi had a positive effect. In May, latex production is influenced by sucrose, Pi, and thiol by 32.5%, June 27.5% and July 38.5%.

Keywords : Hevea brasiliensis, clone PB 260, production and physiology latex

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OPTIMALISASI PRODUKSI JAGUNG MANIS DENGAN PEMBERIAN PUPUK BERIMBANG ORGANIK DAN ANORGANIK

THE OPTIMIZATION PRODUCTION OF SWEET CORN BY THE BALANCED OF ORGANIC AND INORGANIC FERTILIZER

Yenni Asbur1*, Yayuk Purwaningrum

Program Studi Pascasarjana Fakultas Pertanian USU Medan, 20155 *Corresponding author : yenniasbur@gmail.com

ABSTRAK

Produktivitas jagung manis saat ini belum mencapai hasil optimal, sehingga dibperlukan upaya untuk meningkatkannya, salah satunya melalui pemupukan berimbang organik dan anorganik. Penelitian ini bertujuan untuk mengetahui pemupukan berimbang organik dan anorganik yang tepat untuk meningkatkan pertumbuhan dan produksi jagung manis. Penelitian dilaksanakan di kebun percobaan Balai Benih Induk Kabupaten Deli Serdang, Sumatera Utara menggunakan Rancangan Acak Kelompok (RAK) satu Faktor dengan tiga ulangan. Pemupukan berimbang organik dan anorganik yang diberikan terdiri dari 9 taraf, yaitu :100 kg/ha NPK + 5 t/ha pupuk kandang sapi diberikan pada saat tanam, 100 kg/ha NPK + 10 t/ha pupuk kandang sapi diberikan pada satu minggu sebelum tanam, 100 kg/ha NPK + 15 t/ha pupuk kandang sapi diberikan pada pada dua minggu sebelum tanam, 200 kg/ha NPK + 5 t/ha pupuk kandang sapi diberikan pada saat tanam, 200 kg/ha NPK + 10 t/ha pupuk kandang sapi diberikan satu minggu sebelum tanam, 200 kg/ha NPK + 15 t/ha pupuk kandang sapi diberikan pada dua minggu sebelum tanam, 300 kg/ha NPK + 5 t/ha pupuk kandang sapi diberikan pada saat tanam, 300 kg/ha NPK + 10 t/ha pupuk kandang sapi diberikan satu minggu sebelum tanam, dan 300 kg NPK + 15 t/ha pupuk kandang sapi diberikan pada dua minggu sebelum tanam. Hasil penelitian menunjukkan bahwa pemberian pupuk berimbang organik dan anorganik dengan dosis 200 kg/ha NPK + 10 t/ha pupuk kandang sapi yang diberikan satu minggu sebelum tanaman mampu menghasilkan berat tongkol dan panjang tongkol tertinggi dibandingkan perlakuan lainnya. Berdasarkan pemetaan dua dimensi, produksi jagung manis yang meliputi berat tongkol, diameter tongkol dan panjang tongkol dipengaruhi oleh jumlah daun dibandingkan tinggi tanaman.

Keywords : pupuk NPK, pupuk kandang sapi, jagung manis

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Decomposition and release rate of asystasiagangetica (l.) T. Anderson litter nutrient using litterbag method

Yenni Asbur, Yayuk Purwaningrum

Departement of Agroteknologi, Faculty of Abgriculture, Universitas Islam Sumatera Utara, Medan, Indonesia *Corresponding author E-mail: yenni.asbur@fp.uisu.ac.id

Abstract

The research aimed to determine the rate of decomposition and release of A. gangetica litter in conditions without shading and shading, and in turn it can be simulated the effects of environmental factors on the decomposition rate and contribution of A. gangeticalitter nutrients to the soil. Research was carried out at Research Farm, Faculty of Agriculture, UISU, Medan, North Sumatra, from January to April 2018. The study used a non-factorial randomized block design with five replications. The treatment is shade which consisting of two levels namely without shading, and with 50% shading. The results showed that the litter weight of A. gangetica decreases with the length of the decomposition period. The decrease in litter weight of A. gangetica is more influenced by the decomposition period than the shade treatment. However, decomposition rate, decreased nutrient concentration in litter tissue, and increased litter release of A. gangetica is affected by shading and decomposition period. Decomposition rate, decrease in litter concentration and release of litter nutrients more quickly in conditions without shadingby the longer decomposition period.

Keywords : decomposition rate, A. gangetica, litterbag method

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Production Optimation of Clones Slow Starter IRR 42 Aplication Through Stimulant Etefon

Yayuk Purwaningrum, Junaidi and Lollie Agustina

Islamic University of North Sumatra

Abstract

IRR 42 clones belonging to clone a slow starter who has growth and great girth, but production of the rubber tends to be low when compared to other superior clones. This study aims to obtain stimulant treatment may be able to optimize the production potential clones IRR 42. The research was conducted at the research institute for experimental sungei white, rubber research center for four months (may-august 2012) in the area of crop planting clones IRR 42 years in 2006 (6 years old plants).

Keywords : Havea brasiliensis, IRR 42, stimulant, production, rubber

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PENGARUH PEMANGKASAN DAN JENIS MULSA TERHADAP PERTUMBUHAN DAN PRODUKSI TANAMAN TIMUN  (Cucumis sativus. L)

Yayuk Purwaningrum

Fakultas Pertanian Universitas Islam Sumatera Utara

Jl. Karya Bakti No. 34 Medan Johor Telp.(061) 69692531

 ABSTRAK

Penelitian bertujuan untuk mengetahui pengaruh pemangkasan dan jenis mulsa serta interaksi keduanya terhadap pertumbuhan dan produksi tanaman timun.  Penelitian ini telah dilaksanakan dari bulan Oktober 2009 sampai Desember 2009. Penelitian ini menggunakan Rancangan Acak Kelompok (RAK) dengan 2 (dua) faktor yang diteliti yaitu factor Pemangkasan (P), terdiri dari 3 taraf perlakuan, yaitu : P0 (Pemangkasan pada ruas 6 – 12 dipelihara 1 (satu) daun), P1 (Pemangkasan pada ruas 6 – 12 dipelihara 2 (dua) daun), P2 (Pemangkasan pada ruas 6 – 12 dipelihara 3 (tiga) daun).  Faktor pemberian Mulsa (M), terdiri dari 4 taraf perlakuan, yaitu : M0 (Tanpa Mulsa), M1 (Mulsa Jerami), M2 (Sabut Kelapa) dan M3 (Mulsa Plastik Perak). Hasil penelitian menunjukkan bahwa perlakuan pemangkasan yang baik diperoleh pada perlakuan P2 (Pemangkasan pada ruas 6 – 12 dipelihara 3 daun) yaitu dengan panjang buah timun 21,72 cm dan diameter buah timun 6,13 mm. Untuk pemberian jenis mulsa memberikan pengaruh yang nyata terhadap semua parameter yang diteliti, namun ada kecenderungan pemberian mulsa Plastik Perak yang paling bagus, yaitu produksi buah timun per plot 15,82 kg/plot. Kombinasi antara pemberian mulsa dan pemangkasan tidak berbeda nyata terhadap semua parameter.

Kata kunci : jenis mulsa, pemangkasan, tanaman timun

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Pemanfaatan Kandungan Metabolit Sekunder pada Tanaman Kunyit dalam Mendukung Peningkatan Pendapatan Masyarakat

Utilization of secondary metabolite in the turmeric plant to increase community income

Kusbiantoro, D. ∙ Y. Purwaningrum

FakultasPertanian,Universitas IslamSumateraUtara. Jl.KaryaWisataGedungJohor, Medan-20144,SumateraUtara,Indonesia

Abstrak

Curcumin merupakan komponen aktif yang banyak terkandung di dalam kunyit. Selain dapat melindungi hati dari kerusakan juga dapat berfungsisebagaiantioksidanyangkuat(menangkap radikal-radikal bebas yang berbahaya bagi sel tubuh), mampu menahan pelipatgandaan sel kanker,dapatmenurunkankolesterol,dansebagai anti radang. Penelitian terakhir mem-buktikan bahwa Curcumin juga dapat mencegah kanker usus besar. Curcumin ini sudah banyak diteliti olehparaahlibaikdariluarnegerimaupundalam negeri sebagai hepatoprotektor (pelindung hati dari kerusakan) dan mempercepat regenerasi sel hati. Dunia medis modern hingga saat ini masih mempercayakanterapi hati dengan menggunakan Curcumin, karena lebih aman dibanding menggunakan zat lain yang tidak alami. Diperlukan usaha (agribisnis) yang besar, mantap danterusmenerussertaintensifpenyediaanbahan baku dan sumber asal bahan bakunya untuk ditanam dan dikembangkan dengan harapan agar didapatkan produksi tanaman obat yang tinggi sehingga dapat meningkatkan nilai perdagangannya(ekspor)dandevisaIndonesia.

Katakunci : Kunyit, curcumin, pendapatan

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PENGARUH SISTEM EKSPLOITASI TERHADAP PRODUKSI KARET PADA KLON PB260

EFFECT OF RUBBER PRODUCTION SYSTEM EXPLOITATION AGAINST THE PB260 CLONES

Yayuk Purwaningrum, JA. Napitupulu , Chairani Hanum, and THS Siregar

Fakultas Pertanian, Universitas Islam Sumatera Utara Medan

ABSTRAK

Penelitian ini bertujuan mempelajari fisiologi tanaman karet klon PB260 untuk mendapatkan system exploitasi yang tepat untuk meningkatkan produksi sesuai dengan karakter klon. Penelitian ini dilaksanakan di perkebunan karet klon PB260 umur 15 tahun kebun PTPN Nusantara III Sei Putih mulai April 2014 sampai April 2015. Penelitian ini menggunakan rancangan acak kelompok dengan sistem eksploitasi sebagai perlakuan dan masing-masing diulang sebanyak tiga kali. Sistem ekploitasi yang digunakan, yaitu sistem sadap (P) dengan empat taraf : P1 : S/2 d3 BI-1, P2 : S/4 d3 BI-1, P3 : S/2U d3 H0-1, P4 : S/4U d3 H0-1, dan jenis stimulan (S) dengan empat taraf : S0 : Etepon 2.5%, S1 : Stimulan gas 3 x sadap per aplikasi, S2 : Stimulan gas 6 x sadap per aplikasi, S3 : Stimulan gas 9 x sadap per aplikasi. Hasil penelitian menunjukkan bahwa Sistem eksploitasi yang relative aman untuk klon PB260 adalah perlakuan sistem eksploitasi S/2 U d3 ETG /27d dan S/4U d3 ET /30d yang menghasilkan produksi (g p-1s-1) 19.27g p-1s-1 dan 18.90 g p-1s-1, dengan kadar tiol relative aman yaitu 0.4 mM.

Keywords : klon PB260, sistem exploitasi, sucrose, Pi, thiol.

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MEKANISME PENYERAPAN UNSUR HARA ANGGREK PADA AKLIMATISASI

Absorption Mechanism Of Elements In Hara Orchid Acclimatize

Yayuk Purwaningrum

Mahasiswa Program Doktor Ilmu Pertanian, Fakultas Pertanian Universitas Sumatera Utara, Medan

Review

Abstrak

Secara teori, mekanisme penyerapan nutrisi berlangsung melalui dua jalur yaitu jalur apoplast dan jalur simplast yang keduanya kemudian diarahkan untuk melewati plasma membran dalam sel endodermis yang memiliki lapisan gabus dan dikenal sebagai pita kaspari. Pengangkutan Apoplast  adalah pengangkutan sepanjang jalur ekstraseluler yang terdiri atas bagian tak hidup dari akar tumbuhan, yaitu dinding sel dan ruang antar sel. air masuk dengan cara osmosis. Aliran air secara apoplas tidak dapat terus mencapai xilem karena terhalang oleh lapisan endodermis. Kenapa air berhenti mengalir, Air tidak mengalir karena terhalang bagian endodermis bersifat impermeable yang memiliki penebalan dinding sel dari suberin dan lignin, namun ada bagian yang khusus yaitu celah kaspari yang bisa dilalui air Dengan demikian, pengangkutan air secara apoplas pada bagian korteks dan stele menjadi terpisah. Pengangkutan Simplast adalah pengangkutan  melalui sel epidermis bulu akar, air dan mineral yang terlarut bergerak masuk kedalam sel (inilah yang membedakan dari keduanya) Air masuk sitoplasma dan vakuola, kemudian bergerak dari satu sel ke sel yang lain melalui plasmodesmata. Sistem pengangkutan ini , menyebabkan air dapat mencapai bagian Xylem yang ada bagian silinder pusat. Adapun lintasan aliran air pada pengangkutan simplast jika diurutkan dari luar kedalam Sel – sel bulu akar menuju sel – sel korteks – endodermis – perisikel – xilem. Dari sini , air dan garam mineral siap diangkut keatas menuju batang dan daun.

Keywords : apoplast, simplast

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PERANAN  CACING TANAH TERHADAP KETERSEDIAN HARA DI DALAM TANAH

The Role of Worms for Land Nutrient Availability  in The Land

Yayuk Purwaningrum1)

Review

Intisari

Tanah merupakan bagian dari tubuh alam yang menutupi bumi dengan lapisan tipis, disintesis dalam bentuk profil dari pelapukan batu dan mineral, dan mendekomposisi bahan organik yang kemudian  menyediakan air dan unsur hara yang berguna untuk pertumbuhan tanaman. Yang membuat tanah itu subur diantaranya pelapukan lanjut, bahan mineralogi, kapasitas pertukaran kation (KTK) yang tinggi, kelembaban air, pH netral dan kelebihan garam. Tanah bersifat sangat penting bagi kehidupan, sehingga perlindungan kualitas dan kesehatan tanah sebagaimana perlindungan terhadap kualitas udara dan air harus sangat dijaga. Namun banyak faktor yang dapat menurunkan kualitas dan kesehatan tanah tersebut, misalnya kadar hara yang terkandung dalam tanah, vegetasi, iklim, sifat fisik dan kimia tanah. Kesehatan tanah itu sendiri dapat didefinisikan secara umum sebagai kemampuan berkelanjutan dari suatu tanah untuk berfungsi sebagai suatu sistem kehidupan yang penting didalam batas-batas ekosistem dan tata guna lahannya, untuk menyokong produktivitas hayati, meningkatkan kualitas udara dan lingkungan perairan, serta memelihara kesehatan tanaman, hewan dan manusia. Kualitas tanah itu sendiri dapat didefinisikan secara umum sebagai kemampuan tanah untuk menghasilkan produk tanaman yang bergizi dan aman secara berkelanjutan, serta meningkatkan kesehatan manusia dan ternak, tanpa menimbulkan dampak negatif terhadap sumberdaya dan lingkungan. Lahan pertanian yang mengandung cacing tanah pada umumnya akan lebih subur karena tanah yang bercampur dengan kotoran cacing tanah sudah siap untuk diserap oleh akar tanaman. Cacing tanah yang ada didalam tanah akan mencampurkan bahan organik pasir ataupun bahan antara  lapisan atas dan bawah. Aktivitas ini juga menyebabkan bahan organik akan tercampur lebih merata. Kotoran cacing tanah juga kaya akan unsur hara.Salah satu organisme penghuni tanah yang berperan sangat besar dalam perbaikan kesuburan tanah adalah fauna tanah. Proses dekomposisi dalam tanah tidak akan mampu berjalan dengan cepat bila tidak ditunjang oleh kegiatan makrofauna tanah. Diharapkan artikel ini memberikan formasi ilmiah tentang potensi cacing tanah sebagai bioindikator untuk menilai kualitas lahan

Keywords : cacing tanah, bioindikator, kesuburan tanah

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Sucrose, Inorganic Phosphate and Latex Thiol in Clones PB260 and BPM1

Purwaningrum.Y1, Napitupulu. JA. 2, Hanum.C3, Siregar. THS. 4

 Abstract

The content of various metabolites (sucrose, inorganic phosphate, thiol) in the latex can be used as a guide in order to achieve optimal crop production. This study aims to determine the content of metabolites and production in clones BPM1 and PB260. Research conducted by PT. PTPN III (Persero), at March – July 2014 in the area of ​​plant clones PB260 and BPM1 planting year 1999 (plant age 15 years). The treatments tested as many as 2 clones that clones representing low metabolism (BPM1) and clones that represent a high metabolism (PB26) with a system of tapping 1/2Sd3. This study was prepared using a randomized block design (RAK). Each repeated three times by using ten trees each unit of experiment results of correlation analysis showed that sucrose with inorganic phosphate correlate quite real. Rubber production (g-1t-1t), the highest in January at BPM1 clones is equal to 29.70 (g-1t-1t) and the clone PB260 23.25 (g-1t-1t) and lowest in April that is equal to 9.40 (g-1t-1t) in clones BPM1 and 10.08 (g-1t-1t) on the clone PB260. Required further observations over a longer time to determine the production of rubber on each con BPM1 and PB260.

Keywords: Hevea brasiliensis, clone PB260, BPM1, sucrose, inorganic phosphate, thiol

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ANATOMY IDENTIFICATION OF CLONES BPM 1 AND PB 260

Yayuk Purwaningrum1*, JA Napitupulu2, Chairani Hanum2 ,THS Siregar3

1Department of Agroteknologi, Faculty of Agriculture, Islamic University of North Sumatra, Jl. Karya Wisata Gedung Johor, Medan 20144, North Sumatra, Indonesia 2Agricultural Science Programme, Faculty of Agriculture, Universitas Sumatera Utara, North Sumatera, Indonesia 3Indonesian Rubber Research Institute Sungai Putih, Deli Serdang, North Sumatera, Indonesia *Department of Agroteknologi, Faculty of Agriculture, Islamic University of North Sumatra, Jl. Karya Wisata Gedung Johor, Medan, North Sumatra, Indonesia Hp: 08126336290. E-mail: yayuk_dadan@yahoo.com

ABSTRACT: Rubber productivity is determined by morpho-physiological characters such as girth, bark thickness, number and diameter of latex vessels. This research aims to study anatomy and physiology character of yield-related clone BPM1 and PB 260. The research was conducted at PT. Perkebunan Nusantara III (Persero), Sungai Putih, in planting area of clones PB 260 and BPM1 for planting year 1999 (rubber age is 15 years). The data was analyzed using t test. The results show there were no differences between number and diameter of latex vessels, sucrose levels, inorganic phosphate, and yield between clones PB 260 with BPM1 for recovered and virgin skin. Thiol levels were higher in clones PB260 compared with BPM1, as well as the recovered skin is higher than the virgin skin.

Keywords: Clone PB 260, BPM 1, anatomy and physiology variable

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Studi Pustaka Kulit Pulihan Pada Tanaman Karet (Havea Braslliensis)

Yayuk Purwaningrum

Mahasiswa Sekolah Pascasarjana Universitas Islam Sumatera Utara, Program Doktor (S3)

Email : yayuk_dadan@yahoo.com

Abstrak

Kulit pohon yang pulih lazim disebut kulit pulihan (renewble bark), sedangkan kulit pohon yang baru pertama kali disadap lazim disebut kulit perawan (virgin bark). Kulit pohon merupakan modal yang sagat berharga bagi perusahaan perkebunan karet. untuk menjaga keberlanjutan produksi kulit pulihan hasil sadap harus dapat terbentuk dengan baik. Kulit karet dengan tinggi 260 cm dan permukaan tanah merupakan modal petani karet untuk memperoleh pendapatan selama kurun waktu sekitar 30 tahun. jika terjadi kesalahan dalam penyadapan maka produksi latekx akan berkurang. Penyadapan yang salah menyebabkan pembentukan kulit pulihan akan terganggu, batang benjol-benjol dan cadangan kulit habis. Batang yang tidak rata juga akan  menyulitkan penyadapan selanjutnya. Ketebalan yang dianjurkan dalam penyadapan adalah 1-1,5 mm dari kambium.

Kata Kunci : Havea braslliensis, kulit pulihan, xilem, floem

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ANATOMI dan PRODUKSI KLON BPM 1 dengan BERBAGAI SISTEM EKSPLOITASI

Yayuk Purwaningrum1, JA Napitupulu2, Chairani Hanum2 , dan THS Siregar3

1Program Agroteknologi, Fakultas Pertanian, Universitas Islam Sumatera Utara, Medan; 2Program Ilmu Pertanian, Fakultas Pertanian, Universitas Sumatera Utara; 3Pusat Penelitian Karet Sungai Putih, Deli Serdang, Sumatera Utara

email: yayuk_dadan @yahoo.com

ABSTRACT

This study aims to improve the yield rubber clones BPM 1 on the renewable bark through a system of tapping and use of stimulants gas. Long-term goal is to get a package of technology which exploits correspond to the typology clones. The study, compiled by Design Nested (Nested Design) with two factors, namely the treatment of tapping system and stimulant. Factors tapping system consists of four levels and four levels of the stimulant factor. Details of each other treatment factors are as follows: Tapping system  = S/2, S/4, S/2U and S/4U. Type Stimulants Etepon 2.5%, 3x/tapping gas Stimulants/applications, 6x tapping/applications, 9x tapping/ application. The results showed that there was no difference in the number and diameter latex vessels between virgin and renewable bark on clones BPM 1 age of 15 years. Long cut tapping ​​half girth toward the bottom (renewable bark) with the distribution of stimulants gas 18 days (S/2 d3 ETG/18d) produce the highest yield of 40.85 g p-1s-1. During one year of testing granting all stimulant treatment in clones BPM 1 have not shown stress-exploitation which is reflected in the levels of thiol relative safety of 0.35 mM – 0:50 mM

Keyword : Clones BPM 1, renewable bark, tapping system, a stimulant gas, physiology and latex yield.

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Metode USLE Cara Menghitung Potensi  Terjadinya Erosi Tanah  Setelah  Kebakaran Hutan Di Yunani 

1YAYUK PURWANINGRUM

1Program Studi Agroteknologi, Fakultas Pertanian, Universitas Islam Sumatera Utara, Jl. Karya Wisata Gedung Johor, Medan

Email : yayuk_dadan@yahoo.com

Abstrak

Pada tanggal 21 Agustus 2006 terjadi kebakaran besar hutan pinus, yaitu seperlima  dari  Semanjung Di Utara Yunani habis  terbakar.  Untuk menilai seberapa besar potensi erosi tanah akibat kebakaran hutan serta cara rehabilitasi yang sesuai untuk penangananya digunakan penilaian kuantitatif. Setelah terjadi kebakaran untuk melindungi tanah terhadap erosi menerapkan metode kontur -log pada lereng bukit yaitu bekas pohon-pohon yang terbakar serta cabangnya ditumpuk dilereng bukit untuk menahan erosi. Menurut informasi Geografis potensi erosi tanah sebelum kebakaran ditemukan 2,8 t/h/tahun setelah kebakaran hutan 29,5 ton/h/tahun setelah direhabilitasi erosi tanah 21,3 t/h/tahun. Model USLE berhasil digunakan dalam perencanaan rehabilitasi tetapi tidak dapat  digunakan dalam pengukuran secara  kuantitatif kerugian erosi tanah setelah terjadi kebakaran .

 Kata kunci : Erosi tanah, Wildland api, Rehabilitasi

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KULTUR KALUS SEBAGAI PENGHASIL METABOLIT SEKUNDER BERUPA PIGMEN

Yayuk Purwaningrum

Universitas Islam Sumatera Utara

Abstrak

Penggunaan kultur jaringan adalah aman, karena rendahnya kontaminasi oleh virus, Penggunaan metabolit sekunder semakin meningkat seperti dibidang farmakologi (obat-obatan) dan industri makanan (pewarna). Menurut Sudarmadji (2003), kalus adalah suatu kumpulan sel amorphous yang terjadi dari sel-sel yang membelah diri dan terdiri atas sel parenkim (Slater et al., 2003). Menurut Stafford dan Warren (1991), kelebihan penggunaan kultur jaringan dengan menggunakan kalus adalah pada kultur kalus penampakan morfologi lebih mudah diamati, terutama warna sehingga penggunaan kultur dengan kalus sesuai dalam memproduksi zat warna atau pigmen yang berasal dari tanaman.

Kultur kalus juga digunakan untuk menginisiasi kultur suspensi sel pada media cair. Menurut Hos (2008), terdapat tiga tahapan dalam kultur kalus, yaitu tahapan induksi, proliferasi, dan diferensiasi. Tahapan induksi sel pada eksplan yang mengalami dediferensiasi dan memulai pembelahan, pada tahapan proliferasi pembelahan sel terjadi cepat, sedangkan pada tahapan diferensiasi terjadinya proses metabolisme atau organogenesis. Tingkat pertumbuhan dari kalus dapat digambarkan sebagai kurva pertumbuhan yang memiliki lima tahapan (fase).

Kondisi kalus berbeda pada tiap tahapan pertumbuhan. yaitu (1) fase lag, dimana sel dalam persiapan membelah; (2) fase eksponen, merupakan pembelahan sel maksimal; (3) fase linear, pembelahan melambat dan sel memperbesar; (4) fase pertumbuhan menurun; (5) fase stasioner atau tidak ada pertumbuhan, jumlah sel konstan. Menurut Saito and Mizukami (2002), pada kultur kalus terdapat beberapa faktor yang dibutuhkan terutama dalam optimalisasi produksi metabolit sekunder, yaitu zat pengatur tumbuh (ZPT), nutrisi medium (nitogen, fosfat, sukrosa, ion Cu2+), elisitor, faktor fisika (cahaya, temperatur, pH, aerasi, kepadatan sel), dan faktor biologi (variasi sel, kemampuan biosintesis). ZPT yang digunakan Pada medium primer zat pengatur tumbuh dalam pembentukan kalus sering digunakan berupa sitokinin (BAP, BA, kinetin) dan auksin (IAA, NAA, atau 2,4-D). Pada konsentrasi antara auksin dengan sitokinin yang seimbang akan menginduksi kalus (Gurel et al., 2000).

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Development of Agriculture Curriculum for Higher Education Institutions on Islamic University of North Sumatera, Medan, Indonesia:

 Yayuk Purwaningrum, Yenni Asbur

Faculty of Agriculture, Islamic University of North Sumatera, Medan, Indonesia

Abstract

Core business of a university centers is laid on the curriculum. Teaching, learning, assessment and university products all have bearing on curriculum. In this discussion paper, the researchers engage in theoretical underpinnings of curriculum development universities in North Sumatera. There were changes in the curriculum at Indonesian universities, from focused on solving the university internal problems with target on mastery in science and technology, toward emphasizing education with reference to the context of culture and human development in a comprehensive and universal manner with the target to produce graduates who are cultured and able to play in the international world. Currently, Indonesian National Qualifications Framework Curriculum (KKNIs) is concept of higher education curriculum in Indonesia, based on four pillars of education of UNESCO. In KKNIs curriculum, there is fundamentally changes on curriculum orientation, from focused on the content of science (science and technology), to more focused on the ability of its graduates to have larger roles in society, especially in culture. It was concluded that there is a need to change the curriculum of higher education in Indonesia, especially agricultural higher education, study program of Agro-technology to KKNIs, with aim to improve the competence of agriculture graduates of study program of Agro-technology and develop agriculture in Indonesia, so that agricultural products in Indonesia, especially Medan, accepted internationally.

Keywords: Education, Indonesian National Qualifications Framework Curriculum, Agro technology

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RESPONSE OF THE GROWTH AND PRODUCTION OF MELON (CUCUMIS MELO L.)
ON PLANT HORMONE AND COW MANURE APPLICATION

Rahmi Dwi Handayani Rambe, Syamsafitri, Yenni Asbur*, Yayuk Purwaningrum and Indra Gunawan

Department of Agrotechnology, Faculty of Agriculture, University Islam Sumatera Utara, Jalan Karya Wisata Gedung Johor, Medan 20144, Indonesia.

ABSTRACT

Melons are one of the main priority crops that receive attention among other horticultural crops, as the price of melons is relatively higher. This study aimed to produce higher quality melon fruit with larger diameter and fruit weight, accompanied by increased production. The study was carried out at the Department of Agriculture Jl. Keramat Indah No.4 Selambo, Medan, North Sumatra from June 2016 to August 2016 using a Factorial Random Block Design with three replications. The first factor was the superior plant hormone dose (H) consisting of four levels: 0 mL /L water (H0), 1 mL /L water (H1), 2 mL /L water (H2), and 3 mL/L water (H3). The second factor was the dose of cow manure (P) consisting of four levels, namely: 0 t/Ha (P0), 20 t/Ha (P1), 40 t/Ha (P2), and 60 t/ha (P3). Plant hormone application as much as 3 mL/L of water and cow manure as much as 60 t/ha could increase the number of flowers, fruit diameter, and fruit weight of melon. The quality of melon produced is still not close to the desired quality of the world market, which is around 1.5-3.0 kg, because the optimum concentration of growth hormone and optimum dosage of cow manure has not been obtained yet.

KEYWORDS: Melons are one of the main priority crops that receive attention among other horticultural crops.

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RESPONSE OF GROWTH AND YIELD OF SHALLOTS (ALLIUM ASCOLANICUM L.) BY POTASSIUM NITRATE (KNO3) AND ORGANIC LIQUID FERTILIZATION 

Arif Anwar1, Syamsafitri1, Mahyuddin1, Yenni Asbur1*, Ichpan Zulfansyah1, YayukPurwaningrum1, RahmiDwi Handayani Rambe1, Murni Sari Rahayu1, Saur Ernawati Manik1, M. Nuh2, Mahyu Danil2, DediKusbiantoro3 and Khairunnisyah3

1Department of Agrotechnology, Faculty of Agriculture, Universitas Islam Sumatera Utara, Jalan Karya Wisata Gedung Johor, Medan 20144, Indonesia.
2Department of Agricultural Product Technology, Faculty of Agriculture, Universitas Islam Sumatera Utara, Jalan Karya Wisata Gedung Johor, Medan 20144, Indonesia.
3Department of Agribusiness, Faculty of Agriculture, Universitas Islam Sumatera Utara, Jalan Karya Wisata Gedung Johor, Medan 20144, Indonesia.

ABSTRACT

The shallots are one of the leading vegetable commodities, but have not shown a real increase in production every year so that efforts are needed to increase the production of shallots. This study aimed to obtain the optimum dose of KNO3 fertilizer and liquid organic fertilizer in increasing the growth and yield of shallots. The study was conducted at the Balai Benih Induk, Medan, North Sumatra, Indonesia from March-June 2017. This study used factorial randomized block design with three replications. The first factor is the dose of KNO3 fertilizer: 0 g/plot, 15 g/plot, 25 g/plot, 40 g/plot. The second factor is liquid organic fertilizer: 4.5 mL/L water, 9 mL/L water, 13.5 mL/L water. The results showed that the 40 g/plot KNO3 fertilizer gave the best growth and yield of shallots. Provision of liquid organic fertilizer 13.5 mL/L water and interaction treatment between 25 g/plot of KNO3 fertilizer and 40 g/plot with a concentration of liquid organic fertilizer 13.5 mL/L of water could only increasing the number of shallot leaves but have not been able to increase the yield of shallot bulbs.

KEYWORDS : Shallot, potassium nitrate, liquid organic fertilizer.

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STUDY OF STORAGE PERIOD AND PACKAGING TYPES AGAINST
PHYSIOLOGICAL ASPECTS OF SOYBEAN (GLYCINE MAX (L.) MERRILL) SEEDS 

Saur Ernawati Manik1, Orleans Ginting2, Yenni Asbur1*, Yayuk Purwaningrum1, Rahmi Dwi Handayani Rambe1, Syamsafitri1, Murni Sari Rahayu1, Arif Anwar1, Indra Gunawan1, DediKusbiantoro3, Khairunnisyah3 Miranti4

1Department of Agrotechnology, Faculty of Agriculture, Universitas Islam Sumatera Utara, Jalan Karya WisataGedung Johor, Medan 20144, Indonesia.
2Department of Agroecotechnology, Faculty of Agriculture, Universitas Pembangunan Panca Budi, Jalan Jend. GatotSubroto Km. 4.5 Sei Sikambing, Medan 20122, Indonesia.
3Department of Agribusiness, Faculty of Agriculture, Universitas Islam Sumatera Utara, Jalan Karya Wisata GedungJohor, Medan 20144, Indonesia.
4Department of Agricultural Product Technology, Faculty of Agriculture, Universitas Islam Sumatera Utara, JalanKarya Wisata Gedung Johor, Medan 20144, Indonesia.

ABSTRACT

Soybeans are one of the agricultural commodities that are economically strategic sectors in Indonesia. The main limiting factor for soybean production is the availability of quality seeds because soybean seeds rapidly deterioration in storage. This study aimed to determine the effect of packaging type and storage period on the physiological aspects of soybean seed viability. The study was conducted at the Balai Benih Induk Laboratory, Medan, North Sumatra, Indonesia from January to September. The study used factorial Randomized Completely Design with 3 replications. The first factor is the packaging type (P) consisting of 4 levels: container (P1); plastic bags (P2), pots (P3), wooden box (P4). The second factor is the save period (S) consists of 3 levels: 2 months (S1), 4 months (S2), 6 months (S3). Variables observed were seed water content, germination, germination rate index, anaphase index, and chromosome aberration. The results showed that soybean seeds stored in container were able to maintain the quality of their seeds for 6 months in the storage period based on a decrease in water content, germination, and anaphase index. Soybean seeds stored in container can reduce the rate of deterioration of seed viability based on the germination rate index. Although the germination of soybean seeds stored in container for 6 months is still above 90%, they have experienced chromosome aberration.

KEYWORDS : Soybean seed, packaging, storage period, water content, seed viability.

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Latex quality and yield parameters of Hevea brasiliensis (Willd. ex A. Juss.) Müll. Arg. clone PB 260 for different tapping and stimulant application frequencies

Yayuk Purwaningrum1*, Yenni Asbur1, and Junaidi2

1North Sumatera Islamic University, School of Agriculture, Department of Agrotechnology, Jl. Karya Wisata Gedung Johor, Medan20144, Indonesia. *Corresponding author yayuk.purwaningrum@fp.uisu.ac.id).

2Sungei Putih Research Center, Indonesian Rubber Research Institute, PO. Box 1415 Medan 20001, Indonesia.

ABSTRACT

Tapping and stimulant applications are an attempt to increase latex yield. A combination of stimulants with low intensity tapping systems was expected to reduce tapping costs. In addition, it was necessary to regulate the stimulant application frequency based on type and potential clone production. The objective was to determine the effect on physiological parameters and latex yield of Hevea brasiliensis (Willd. ex A. Juss.) Müll. Arg. clone PB 260 for different tapping and stimulant application frequencies. The study design was split block in randomized complete block plots with three replicates and two factors. The main plot was the tapping system consisting of four levels: quarter-spiral downward tapping (S/4 d3), quarter-spiral upward tapping (S/4U d3), half-spiral downward tapping (S/2 d3), and half-spiral upward tapping (S/2U d3). The subplots were four stimulant application frequencies consisting of ethephon 2.5% applied once every 15 d (ET 15d) and gas stimulant (equal to ± 100% ethylene) applied once every 9 d (ETG 9d), once every 18 d (ETG 18d), and once every 27 d (ETG 27d). The highest sucrose levels (3.62 mM) were obtained in S/2 d3 and ET/15d combination. The highest inorganic P content (27.68 mM) was in S/2 d3 and ETG/18d. The highest yield (2418.53 kg ha-1 yr-1) was in S/4d3 and ETG/18d. The tapping system S/4d3 and ETG/18d combination was able to increase production by 102.26% compared with the conventional tapping system (S/2 d3 and ET/15d). After the 1-yr trial, all treatments showed 0.47 to 0.54 mM thiol content, which indicated that plants did not experience over-exploitation stress.

Key words: Ethephon, ethylene gas, inorganic phosphorus, rubber tree, sucrose, thiol.

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DRY LAND MANAGEMENT SYSTEM THROUGH PLANTING PATTERNS
IMPROVEMENT IN BERASTAGI, KARO REGENCY, INDONESIA

Saur Ernawati Manik1, Orleans Ginting2, Yenni Asbur1*, Yayuk Purwaningrum1, Rahmi Dwi Handayani Rambe1, Syamsafitri1, Arif Anwar1, Indra Gunawan1, Murni Sari Rahayu1, Mindalisma1, Mahyuddin1, DediKusbiantoro3, Khairunnisyah3, Dian Hendrawan3, Miranti4, Mahyu Danil4, and M. Nuh4

1Department of Agrotechnology, Faculty of Agriculture, Universitas Islam Sumatera Utara, Jalan Karya WisataGedung Johor, Medan 20144, Indonesia.
2Department of Agroecotechnology, Faculty of Agriculture, Universitas Pembangunan Panca Budi, Jalan Jend. GatotSubroto Km. 4.5 Sei Sikambing, Medan 20122, Indonesia.
3Department of Agribusiness, Faculty of Agriculture, Universitas Islam Sumatera Utara, Jalan Karya Wisata GedungJohor, Medan 20144, Indonesia.
4Department of Agricultural Product Technology, Faculty of Agriculture, Universitas Islam Sumatera Utara, JalanKarya Wisata Gedung Johor, Medan 20144, Indonesia.

ABSTRACT

The land in Berastagi has a high erosion potential caused the high intensity of rainfall, steep slopes, and the cropping pattern is not good. Long-lasting erosion has lowered soil fertility and even reduced or eliminated soil tillage. This study aimed to obtain the appropriate intercropping pattern in the Berastagi dry land of Karo Regency, Indonesia. This study conducted a non-factorial randomized block design method with 5 replications. The treatment is in the form of farmers planting patterns and improved cropping patterns, namely P1, P2, P3, P4, and P5. The results showed that improved cropping patterns yielded higher rice equivalent yields compared to farmers’ cropping patterns. Improved cropping patterns of P4, P2, and P3 are economically feasible in the Berastagi Karo dry land because they have a marginal B/C ratio above two, while the farmers’ cropping pattern, namely intercropping of upland rice/cassava has the lowest B/C ratio of 1.72.

KEYWORDS : Intercropping, upland paddy, cassava, corn, peanuts, green beans.

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Jurnal Penelitian Bidang Ilmu Pertanian, Vol. 10 No. 1, April 2012

Respon Pertumbuhan dan Prosuksi Jagung Manis Terhadap Dosis dan Frekuensi Pemberian Pupuk

Yayuk Purwaningrum

Universitas Islam Sumatera Utara

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Jurnal Penelitian Karet (Indonesian Journal of Natural Rubber Research) Vol. 37 No. 2 Tahun 2019

Tanggap Pertumbuhan Bibit Karet (Havea brasilliensis Muell arg) Klon PB 330 dan Sifat Kimia Media Tanam dengan Pemberian Pembenah Tanah

Yayuk Purwaningrum

Universitas Islam Sumatera Utara

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Jurnal KULTIVASI Vol. 18 No. 3, Desember 2019

Studi Jarak Tanam dan Naungan Terhadap Pertumbuhan dan Potensi Asystasia gangetica (L.). Anderson Sebagai Tanaman Penutup Tanah

Yayuk Purwaningrum

Universitas Islam Sumatera Utara

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Jurnal Penelitian Karet (Indonesian Journal of Natural Rubber Research) Vol. 37 No.1, 2019

Karakter Fisiologi Lateks dan Hubungannya dengan Produksi lateks Klon GT 1 di Kbeun Rakyat Kabupaten Langkat

Yayuk Purwaningrum

Universitas Islam Sumatera Utara

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Chilean Journal of Agricultural Research, Vol 78 No. 4, 2018

Growth and Nutrient Balance of Asystasia gangetica (L.)T. Anderson as Cover Crop for Mature Oil Palm (Elaesi guneensis Jacq) Plantation

Yayuk Purwaningrum

Universitas Islam Sumatera Utara

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International Journal of Scientific & Technology Research (IJSTR), Vol. 8 No. 11, 2019

Growth and Soils Chemicals Properties By Planting Asystasia gangetica (l.)T. Anderson As Cover Crop

Yayuk Purwaningrum

Universitas Islam Sumatera Utara

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Seminar Nasional Kongres 2016 Perhimpunan Agronomi Indonesia (PERAGI)

Anatomi dan Produksi Klon BPM 1 dengan Berbagai SIstem Eksploitasi Klon BPM 1

Yayuk Purwaningrum

Universitas Islam Sumatera Utara

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International Conference on Agriculture, Environment and Food Security (AEFS) 2019

Appropriate Stimulant Application to Determine Latex Physiology Character and Production of Clone RRIM 921 in Regency of Deli Serdang

Yayuk Purwaningrum

Universitas Islam Sumatera Utara

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7th International Conference on Multidisciplinary Research (ICMR) 2018

Exploitation System odel of Slow and Quick Starter Clones Under Oldeman Climate Type

Yayuk Purwaningrum

Universitas Islam Sumatera Utara

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Jurnal Pertanian Tropik, ISSN NO: 2356- 4725/p- ISSN : 2655-7576

Pengaruh Panjang dan Arah Sadap Atas Terhadap Fisiologi dan Hasil Lateks pada Tanaman Karet Klon RRIM 921

Yayuk Purwaningrum1*,Yenni Asbur1, Dedi Kusbiantoro2, Khairunisyah2

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Jurnal Kultivasi Vol. 20 (2) Agustus 2021 135, ISSN: 1412-4718, eISSN: 2581-138x

Respons Fisiologi dan Hasil Lateks Tanaman Karet Klon GT 1 di Kebun Karet Rakyat Terhadap Sistem Eksploitasi dan Curah Hujan

Purwaningrum, Y. ∙ Y. Asbur ∙ D. Kusbiantoro ∙ Khairunisyah

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