Article Per Year (5 Year)
p-Index From 2021 - 2026
4.081
P-Index
This Author published in this journals
All Journal Jurnal Ilmu Pertanian Indonesia Jurnal Penelitian Saintek Agrikultura Journal of Tropical Soils Berkala Ilmiah Pertanian Jurnal Fakultas Pertanian Agrifor : Jurnal Ilmu Pertanian dan Kehutanan JTSL (Jurnal Tanah dan Sumberdaya Lahan) Jurnal Ilmu-Ilmu Pertanian Indonesia Dharmakarya : Jurnal Aplikasi Ipteks Untuk Masyarakat Journal of Degraded and Mining Lands Management Jurnal Agroekoteknologi Jurnal Tanah dan Air Jurnal Agro Kultivasi Jurnal Agrotek Tropika Jurnal Agrotek Indonesia AGROLOGIA : Jurnal Ilmu Budidaya Tanaman Agroekoteknologi Tropika Lembab Soil REns ZIRAA'AH MAJALAH ILMIAH PERTANIAN Jurnal Tanah dan Air (Soil and Water Journal) Agrifarm PERTANIAN TROPIK Dinamika Pertanian
Emma Trinurani Sofyan
Departemen Ilmu Tanah Dan Manajemen Sumberdaya Lahan, Fakultas Pertanian, Universitas Padjadjaran
Agriculture, Biological Sciences & Forestry Arts Humanities Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Decision Sciences, Operations Research & Management Earth & Planetary Sciences Economics, Econometrics & Finance Engineering Environmental Science Immunology & microbiology Languange, Linguistic, Communication & Media Physics Public Health

Published : 66 Documents Claim Missing Document
Claim Missing Document
Check
Articles

Found 66 Documents
Search

 3   4   5   6   7 
Status Hara (Rasio C/N dan C/P), Derajat Infeksi Akar dan Bobot Kering Tanaman Jagung (Zea mays) Akibat Perlakuan Inokulasi Mikoriza dan Aplikasi Kompos pada Inceptisol Jatinangor Pujawati Suryatmana; Leoni Silvia; Mieke Rochimi Setiawati; Emma Trinurani Sofyan; Nadia Nuraniya Kamluddin; Betty Natalie Fitriatin
Soilrens Vol 21, No 1 (2023)
Publisher : Dept Ilmu Tanah & Sumberdaya Lahan Fakultas Pertanian Universitas Padjadjaran

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24198/soilrens.v21i1.49318

Abstract

The status of nutrients N, P, and soil organic content in corn cultivation is an important thing that needs to be pursued to improve soil quality. One such effort is through mycorrhizal inoculation and the application of appropriate compost. The aim of this study was to evaluate the effectiveness of arbuscular mycorrhizal fungi (FMA-1) and compost types on soil chemical properties (C/N, C/P), degree of root infection, and corn pruning weight (Zea mays) on Inceptisols. The experiment used three replications of a factorial randomized block design (RBD). The first factor of FMA inoculation: FMA 0 gpot-1, FMA-1 20 g/pot; Mycofer 20 g/pot, and mix (FMA-1 10 g/pot + FMA mycofer 10 g/pot), and the second factor is compost application: 0 g/pot; 75 gpot-1 rabbit hutch compost; 75 g/pot market waste compost and rabbit cage compost 37.5 g/pot + market waste compost 37.5 g/pot). The results showed that there was no interaction between AMF inoculation and the application of compost which affected soil chemical properties, degree of root infection, and dry weight of corn plants. However, independently AMF affects the degree of root infection, and compost affects the dry weight of corn plants. A dose of 20 g/pot FMA and mixed FMA inoculation (FMA and Mycofer) significantly increased the degree of root infection compared to the control treatment. The application of all types of compost showed a significant increase in corn plant dry weight compared to the control. Doses of 75 g/pot of market waste compost tended to increase plant dry weight higher than other treatments with an addition of 32.07 g each plant.
PENGARUH PUPUK KASCING DAN SP-36 TERHADAP BEBERAPA SIFAT KIMIA TANAH DAN HASIL TANAMAN BUNCIS PADA FLUVENTIC EUTRUDEPTS ASAL JATINANGOR KABUPATEN SUMEDANG Emma Trinurani Sofyan
DINAMIKA PERTANIAN Vol. 29 No. 2 (2014): Jurnal Dinamika Pertanian Edisi Agustus 2014
Publisher : UIR Press

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

The experiment was conducted in order to find out the effects of earthworm casting and SP-36 fertilizer on some soil chemical properties and Kidney bean yield (Phaseolus vulgaris L.) on Fluventics Eutrudepts. The experiment was carried out from March 2013 to November 2013 in green house of Faculty of Agriculture, Padjadjaran University Jatinangor, Sumedang West Java at ± 745 m above sea level. The experiment was a Randomized Block Design of Factorial Patern which consisted of two unit experiments and two factors and three replications. The first factor was earthworm casting in fourth level (0 t ha-1, 7.5 t ha-1, 15 t ha-1 and 22.5 t ha-1). The second factor was SP-36 in fourth level (0 kg ha-1, 100 kg ha-1, 200 kg ha-1 and 300 kg ha-1). The results of experiment showed that there was an interaction effect between earthworm casting with SP-36 fertilizer on C-organic, Available Phosphor, and Kidney bean yield. The application of earthworm casting and SP-36 fertilizers made the single effect on soil acidity. Earthworm casting dosage of 29.94 t ha-1 and SP-36 kg ha-1 gave the highest result on Fluventic Eutrudepts, that is 61.27 g plant-1 and equivalent to 15.32 t ha-1.
PENGARUH PUPUK Si DAN N, P, K TERHADAP KANDUNGAN Si DAN HASIL TANAMAN JAGUNG MANIS (Zea mays L. Saccaharata) Emma Trinurani Sofyan; Oviyanti Mulyani; Ilma Agnia; Abdul Rahmi
Agrifor : Jurnal Ilmu Pertanian dan Kehutanan Vol 23, No 1 (2024): Maret 2024
Publisher : Universitas 17 Agustus 1945 Samarinda

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31293/agrifor.v23i1.7528

Abstract

Pertumbuhan dan produksi tanaman dipengaruhi oleh berbagai karakteristik tanah terutama kesuburan tanah yang berkaitan dengan ketersediaan unsur hara. Pengelolaan kesuburan  tanah harus diperhatikan agar tanah dapat menyokong pertumbuhan dan hasil tanaman yang tinggi dalam jangka waktu yang lama. Percobaan ini bertujuan untuk mencari dosis pupuk Si terbaik terhadap perubahan kandungan unsur hara tanah, pertumbuhan tanaman dan hasil panen tanaman jagung manis. Percobaan ini dilaksanakan di Kebun Percobaan Laboratorium Kimia Tanah dan Nutrisi Tanaman Fakultas Pertanian, Universitas Padjadjaran, Jatinangor, Sumedang pada bulan Mei sampai Agustus 2021. Rancangan penelitian yang digunakan yaitu Rancangan Acak Kelompok (RAK) yang terdiri dari sembilan perlakuan dan diulang tiga kali, yaitu: kontrol; N, P, K rekomendasi; ¼ dosis pupuk Si + 1 dosis N, P, K rekomendasi; ½ dosis pupuk Si + 1 dosis N, P, K rekomendasi; ¾ dosis pupuk Si + 1 dosis pupuk N, P, K; 1 dosis pupuk Si + 1 dosis pupuk N, P, K; 1 ¼ dosis pupuk Si + 1 dosis pupuk N, P, K; 1 ½ dosis pupuk Si + 1 dosis pupuk N, P, K; dan 1 ¾ dosis pupuk Si + 1 dosis pupuk N, P, K. Hasil percobaan menunjukkan bahwa perlakuan 1 ½ dosis pupuk Si + 1 dosis pupuk N, P, K mampu memberikan pengaruh terbaik dalam meningkatkan kandungan Si tanah dan meningkatkan hasil panen tanaman jagung manis.
Enhancing phosphate availability and growth of C. asiatica in andisols through phosphate-solubilizing bacteria application Betty Natalie Fitriatin; Andriana Kartikawati; Tualar Simarmata; Emma Trinurani Sofyan
Jurnal AGRO Vol 10, No 2 (2023)
Publisher : Jurusan Agroteknologi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15575/26315

Abstract

Centella asiatica is a medicinal plant containing asiaticoside bioactive, this is considerably higher if grown in the highlands generally on Andisols. Conversely, phosphorus was deficient in Andisol soils. The experiment aimed to study effect of phosphate solubilizing bacteria (PSB) isolates from the rhizosphere of C. asiatica which can dissolve P, produce plant growth promoters, increase growth of C. asiatica and fertilization efficiency. The research was done at Soil Biology Laboratory, Agriculture Faculty, Universitas Padjadjaran and at the experimental field of Agricultural Technology Research and Assessment Installation Manoko, Lembang District, West Java, Indonesia. The research used a factorial randomized block design with three replications and two factors. The first factor were application techniques: control, root soaking, and soil watering. The second factor were dose of NPK fertilizer and soil conditioner: control, P fertilizer dose of 100%, soil conditioner, P fertilizer dose 75% + soil conditioner, and P fertilizer dose of 100% + soil conditioner. Three superior isolates were isolated from C. asiatica rhizosphere and have been identified as: Paraburkholderia caribensis strain MNL-133, Paraburkholderia caribensis strain DSM 13236, and Pseudomonas aeruginosa strain K19PSE24. The results showed that the application of PSB combined with a dose of P fertilizer and soil conditioner on C. asiatica affected the soil P available, the number of leaves, the number of stolons and plant dry weight.ABSTRAKPegagan (Centella asiatica) salah satu komoditas tanaman obat yang memiliki kandungan bioaktif asiatikosida. Asiatikosida lebih tinggi jika ditanam di dataran tinggi umumnya ordo Andisols. Defisiensi hara fosfor salah satu kendala budi daya pada tanah Andisol. Penelitian ini bertujuan mengkaji pengaruh bakteri pelarut fosfat (BPF) unggul yang diisolasi dari roofer tanaman pegagan yang mampu melarutkan P dan menghasilkan pemacu pertumbuhan tanaman pengaruhnya terhadap peningkatan pertumbuhan tanaman pegagan dan efisiensi pemupukan. Penelitian dilaksanakan di Laboratorium Biologi Tanah, Fakultas Pertanian UNPAD dan di kebun percobaan Instalasi Penelitian dan Pengkajian Teknologi Pertanian (IP2TP) Manoko, Lembang menggunakan Rancangan Acak Kelompok Faktorial dengan tiga ulangan. Faktor pertama adalah teknik aplikasi BPF: kontrol; perendaman akar; penyiraman pada tanah. Faktor kedua yaitu dosis pupuk NPK dan pembenah tanah, yaitu perlakuan kontrol, pupuk P dosis 100%, pembenah tanah, pupuk P dosis 75% + pembenah tanah, dan pupuk P dosis 100% + pembenah tanah. Isolasi BPF dari rhizosfer pegagan menghasilkan isolat unggul yaitu Paraburkholderia caribensis strain MNL-133, Paraburkholderia caribensis strain DSM 13236, and Pseudomonas aeruginosa strain K19PSE24. Hasil menunjukkan pemberian BPF dikombinasikan dengan dosis pupuk P dan pembenah tanah pada tanaman pegagan memberikan pengaruh terhadap P tersedia, jumlah daun, jumlah stolon, dan berat kering tanaman.
Effectiveness of water hyacinth compost and N, P, K, S fertilizer on S-available, S uptake, protein content, and yield of shallot in Inceptisols from Jatinangor Sofyan, Emma Trinurani; Gumelar, Fajar Akbar; Yuniarti, Anni; Joy, Benny; Wicaksono, Fiky Yulianto
Kultivasi Vol 22, No 1 (2023): Jurnal Kultivasi
Publisher : Universitas Padjadjaran

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24198/kultivasi.v22i1.38589

Abstract

. Water hyacinth (Eichhornia crassipes) is a source of organic matter that can be used as compost to improve the soil quality and productivity of shallots. Shallots are horticultural commodities that have various benefits. Inceptisol soils dominate Indonesia, with an area of 37.5% of Indonesia's land area but have low soil fertility. Soil fertility can be increased by optimal fertilization. This experiment aimed to determine the dose of water hyacinth compost and nitrogen (N), phosphor (P), potassium (K), sulfur (S) fertilizer which gave the best effect on increasing available S, S uptake, protein content, and yield of shallots. The experiment was conducted from July to October 2021 at the Experimental Garden of the Laboratory of Soil Chemistry and Plant Nutrition, Faculty of Agriculture, Universitas Padjadjaran, Jatinangor. The experiment used a Randomized Block Design, consisting of seven treatments repeated four times. The recommended fertilizer doses used are 200 kg Urea, 500 kg ZA, 300 kg SP-36, and 200 kg KCl. The compost used was water hyacinth compost at a 25 t/ha dose. The results of this experiment showed that the treatment of ¾ compost + ¾ doses of N, P, K, and S was the best in increasing available S (26.79 mg kg-1), S uptake (7.03 mg/plant), protein content (0.95%), colors and shallot yield (number of tubers, fresh weight, and dry weight) on Inceptisols from Jatinangor.
Shallot cultivation originated from true shallot seed (TSS) on Andisols enriched with various ameliorants Aprianto, Fahmi; Arifin, Mahfud; Sofyan, Emma Trinurani
Kultivasi Vol 22, No 3 (2023): Jurnal Kultivasi
Publisher : Universitas Padjadjaran

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24198/kultivasi.v22i3.48453

Abstract

Application of soil ameliorants is important to improve Andisols properties and increase shallot productivity. The research objective is to determine the kind of ameliorant which the best effect on the growth and productivity of shallots originating from TSS in Andisols Lembang, West Java. The experiment was conducted in Margahayu Research Station, Lembang, West Java from January to May 2021. A randomized block design (RBD) with 6 treatments and 5 replications was set up in the field. Treatments include control (no ameliorant), 20 tons/ha of horse manure, 10 tons/ha of rice straw compost, 10 tons/ha of bamboo leaf compost, 10 tons/ha of husk biochar, and 5 kg/ha humic acid. The results showed that vegetative performance and yield of true shallot seed-based shallot variety of Trisula in Andisols enriched with rice straw compost was higher than in other ameliorant treatments. Additionally, nutrient uptake in rice straw compost treatment was also higher than in other ameliorant treatments.
The effect of cow manure amendment and the ratio of gold mine tailings on sweet potato gold phytomining Noviardi, Rhazista; Joy, Benny; Sudirja, Rija; Setiawati, Mieke Rochimi; Djuwansah, Muhamad Rachman; Karuniawan, Agung; Sofyan, Emma Trinurani; Suryatmana, Pujawati
Journal of Degraded and Mining Lands Management Vol. 12 No. 1 (2024)
Publisher : Brawijaya University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15243/jdmlm.2024.121.6665

Abstract

Artisanal and small-scale gold mining has commonly used the mercury amalgamation method for gold ore extraction. The processing waste or tailings often contain gold and other metals. This study examined the effects of cow manure amendment and the ratio of gold mine tailings on sweet potato     (Ipomoea batatas L.) gold phytomining. The pot experiment was conducted in the Faculty of Agriculture greenhouse at Padjadjaran University in Indonesia. The sweet potato MZ119 clone (an orange-fleshed sweet potato) was planted on a polybag (40 x 40 cm) consisting of 10 kg of planting media, which was a mixture of gold mine tailing and soil. The design used was a completely randomized design factorial with three replications. The first factor was ratios of gold mine tailing consisting of three levels, namely 30%, 50%, 70%, and 100% (w/w). The second factor was doses of organic manure, namely without cow manure, 250 g pot-1, 500 g pot-1, and 750 g pot-1. The results demonstrated that the application of cow dung and the gold mine tailings ratio (w/w) had a significant (p = 0.05) effect on plants' dry weight biomass, gold accumulation, and gold phytomining by sweet potato. The highest gold mass yield of 0.066 mg gold plant-1 was achieved by a 50% (w/w) gold mine tailing ratio and 750 g pot-1 cow manure treatment.
Pengaruh Pemberian Pupuk Organik Terhadap Kandungan Karbon Organik, Nitrogen Total Tanah Dan Hasil Tanaman Jagung (Zea Mays L.) Pada Inceptisols: The Effect of Organic Fertilizer Application on Organic Carbon Content, Total Soil Nitrogen and Corn (Zea Mays L.) Yield in Inceptisols Sofyan, Emma Trinurani; Yulyanti
Agrifarm : Jurnal Ilmu Pertanian Vol 12 No 2 (2023): Jurnal llmu Pertanian Agrifarm
Publisher : Universitas Widya Gama Mahakam

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24903/ajip.v12i2.2578

Abstract

The use of fertilizers as additional nutrition for maize plants needs attention. One of the efforts to optimal this problem is the use of organic fertilizer. This research aimed to study the effect of organic fertilizer  application on organic carbon, total nitrogen and maize (Zea mays L.) yield in Inceptisols. The research was conducted at The Laboratory of Soil Chemistry and Plant Nutrition, Faculty of Agriculture, Universitas Padjadjaran, Jatinangor from June up to November 2022. The design used was Randomized Block Design (RBD) with nine treatments and three replications: (A) Control, (B) NPK, (C) 1OF, (D) ¾NPK + ¾OF, (E) ¾NPK + 1OF, (F) ¾NPK + 1½OF, (G) 1NPK + ¾OF, (H) 1NPK + 1OF, (I) 1NPK + 1½OF. The results showed that the use of Organik fertilizer had a significant effect on soil organic carbon, soil total nitrogen, and maize yield components compared to the control (without fertilizer) and NPK standard. The ¾ of organic fertilizer  (3.75 kg/ha) effectively increased maize yield when mixed with the NPK dose of standard fertilizer at ¾ (262.5+75+37.5 kg/ha). The use of organic ertilizer at that dose can also reduce NPK usage in Inceptisols. Keywords: Organic Fertilizer, C-Organic, N-Total, Sweet Corn, Inceptisol
Respons N-Total, P-Potensial dan K-Potensial dan Hasil Jagung Manis (Zea mays saccharata Sturt) akibat Pemberian Pemupukan Pupuk Organik Remah dan NPK pada Tanah Inceptisol Sara, Dirga Sapta; Sofyan, Emma Trinurani; Joy, Benny
Soilrens Vol 22, No 1 (2024)
Publisher : Dept Ilmu Tanah & Sumberdaya Lahan Fakultas Pertanian Universitas Padjadjaran

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24198/soilrens.v22i1.57246

Abstract

Sweet corn is an agricultural commodity that has increasing market demand and high economic value. To achieve optimal production results, proper fertilization is very important, especially on Inceptisol soils that have low to medium fertility. This study aimed to evaluate the combination of crumb organic fertilizer and NPK fertilizer on soil N-total, P-potential, and K-potential as well as sweet corn crop yield. The experiment was conducted from September to December 2023 at the Experimental Field, Padjadjaran University, using Inceptisol soil, sweet corn seeds, crumb organic fertilizer, and NPK fertilizer (15-15-15). Randomized Group Design, six treatments including control, recommended dose of NPK fertilizer, and combination of crumb organic fertilizer with NPK, repeated 4 times. Analysis in the maximum vegetative phase at 55 HST with testing parameters including soil N-total (Kjeldahl method), P-potential (Bray method), K-potential (ammonium acetate method). The results showed that the combination of ¾ NPK and 1 ½ crumb organic fertilizer was effective in increasing soil N-total, P and K-potential and sweet corn yield.
Influence of phosphate and boron addition to mixed liquid fertilizer on the growth and yield of red chili cultivated in the subsoil layer Sari, Stefina Liana; Sofyan, Emma Trinurani; Solihin, Eso
Kultivasi Vol 23, No 2 (2024): Jurnal Kultivasi
Publisher : Universitas Padjadjaran

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24198/kultivasi.v23i2.53370

Abstract

This study assesses the impact of adding phosphate and boron in a mixed liquid fertilizer (MLF)  on the growth and yield of red chili plants cultivated in a subsoil environment. The experiment was conducted to comprehend how these nutrients affect the performance of red chili plants, particularly when cultivated in less ideal conditions such as subsoil, a remnant of excavation for brick production. The research was carried out at the Ciparanje Garden of the Faculty of Agriculture, Universitas Padjadjaran. The research design employed a Randomized Completely Block Design with the following treatments: A = Control (degraded soil without fertilizer), B = 0% MLF + 1 NPK, C = 0.25% MLF + 1 NPK, D = 0.50% MLF + 1 NPK, E = 0.75% MLF + 1 NPK, F = 1.00% MLF + 1 NPK, G = 0.5% MLF + 3/4 NPK, H = 0.5% MLF + 1/2 NPK, I = 0.5% MLF + 1/4 NPK, J = 0.5% MLF + 0 NPK, and K = 1 NPK in normal soil. The results revealed that the addition of phosphate and boron in MLF significantly influenced the growth and yield of red chili in subsoil conditions. The recommended MLF concentration was 0.75%, alongside the standard NPK dose. These findings provide crucial insights for the development of more efficient and sustainable agricultural practices, especially in challenging soil conditions like subsoil, where nutrient availability can be a determining factor for agricultural success. 
Co-Authors Abdul Rahmi ABDUL RAHMI Abdurrahman Salim Abraham Suriadikusumah Ade Setiawan Adinda Putri Amanda Agnia, Ilma Agung Karuniawan Agung Karuniawan AKTAVIA HERAWATI Andriana Kartikawati Ania Citraresmini Anne Nurbaity ANNE NURBAITY Anne Nurbaity Anne Yuliana Anni Nuraisyah Anni Yunarti Anni Yuniarti Annisya Salsabilla Asty Nesya Atih Winingsih Bawana, Saedi Benny Joy Benny Joy Benny Joy Betty Natalie Fitriatin Betty Natalie Fitriatin Daud Siliwangi Saribun Derisfha Anggraeni Dirga Sapta Sara DIYAN HERDIYANTORO Djuwansah, Muhamad Rachman Dzakaria Yogaswara Eso Solihin Fahmi Aprianto, Fahmi Fakhrurroja, Hanif Fidya A Puspafirdausi Fiky Yulianto Wicaksono Fitri Widiantini Futri Fauziah Ganjar Herdiansyah Ganjar Herdiansyah Ghifari, Raden Faqih Hilmiy Gordon Pius Marihot Gordon Pius Marihot Pius Marihot Gumelar, Fajar Akbar Hermawan, Mega Kartika Hilma Yeni Husen, Anne Yuliana Ilma Agnia Irwandhi Irwandhi, Irwandhi Iva Fitriani Juli Enita Sinaga Karina Astari Khumairah, Fiqriah Hanum Leoni Silvia Mahfud Arifin Marenda Ishak Sonjaya Sule Meddy Rachmadi Meddy Rachmady Mega Kartika Hermawan Mieke Rochimi Setiawati Mubarok, Zakka Tafwidh Muhammad Agus Mulyana Muhammad Amir Solihin Muhammad Farghan Fauzan Muhammad Iqbal Maulana Yusuf Muthia Erwina Nabila Nadia Nuraniya Kamaluddin Nisa Budi Arifiana Oviyanti Mulyani Pujawati Suryatmana Puspafirdausi, Fidya A. Rahmawati Raidasari, Fatharani Rani Ros Rhazista Noviardi Rhazista Noviardi Rija Sudirja Robi Natalie Silpanus Saedi Bawana Salsabilla, Annisya Santi Rosniawaty Sari, Stefina Liana Satria Indra Kusuma Satria, Rievansyah Eka Septianugraha, Reza Shindy Widiana Simanjuntak, Edo Kelvin Stefina Liana Sari Stefina Liana Sari Stefina Liana Sari Tarra Martiana Dewi Tien Turmuktini Triono Bambang Irawan Tualar Simarmata Tualar Simarmata Tualar Simarmata WARID ALI QOSIM yeti kartika Yulianti Machfud Yuliati Machfud Yuliati Machfud Yuliati Machfud Yuliati Machfud Yuliati Machfud Yuliati Machfud, Yuliati Yuliati Mahfud Yulyanti Zaenal Mutaqin