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Assessment of Land Characteristics and Suitability for Citrus Development in Dry Land Punung, Pacitan Regency Supriyadi, Supriyadi; Rahayu, Rahayu; Herdiansyah, Ganjar; Herawati, Aktavia; Novianti, Dita Risky
JOURNAL OF TROPICAL SOILS Vol. 29 No. 2: May 2024
Publisher : UNIVERSITY OF LAMPUNG

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.5400/jts.2024.v29i2.67-77

Abstract

One of the Indonesian provinces where the agricultural industry drives the economy is Punung, Pacitan, which has local conditions that are particularly suitable for producing citrus, giving this product the potential to continue to expand in popularity. Land evaluation tries to provide information on its potential for a particular purpose. This research was conducted to know land suitability classes, limiting factors, and improvement efforts that can be made. This research is exploratory descriptive with a variable approach through field survey and using a purposive random sampling method based on Land Mapping Units. Data analysis was carried out using the matching method between land characteristics and conditions for growing citrus, a statistical test by ANOVA (Analysis of Variance), and Duncan’s Multiple Range Test (DMRT) to find the factors that most determine land characteristics in Punung. The study results show that the actual land suitability class in Punung is marginally suitable. Improvements that can be made to increase the availability of nutrients in the soil in the form of available P2O5 with a low level of management is to apply P fertilization according to the needs of citrus. ANOVA results proved that the variety of soil types significantly influences some of the land characteristics.
Assessment of Andisol characteristics for the development of potato crops in Pangalengan Herdiansyah, Ganjar; Arifin, Mahfud; Suriadikusumah, Abraham; Herawati, Aktavia
JOURNAL OF TROPICAL SOILS Vol. 30 No. 1: January 2025
Publisher : UNIVERSITY OF LAMPUNG

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.5400/jts.2025.v30i1.45-52

Abstract

Pangalengan is a horticultural crop center area in Bandung Regency. The soil in this area consist of Andisol, which is developed from volcanic ash. One of the primary commodities in this area is potatoes. Intensive farming in Pangalengan is a problem that has an impact on soil and environmental conditions, thereby disrupting crop productivity. The research aimed to assess the characteristics of Andisols for the development of potato crop in Pangalengan. This research used qualitative, descriptive, and survey methods. The survey based on physiographic methods. Soil samples were taken purposively. The observations consisted of soil characteristics, erosion, soil fertility and land suitability. The research results show that the soil type is Typic Hapludans. Erosion is moderate (19.06-94.41 tons/ha/year) in SMU 1 and 2, high (311.22 tons/ha/year) in SMU 3 and very high (798.04 tons/ha/year) in SMU 4, soil fertility is low with land suitability for potato crop including marginally suitable (S3) and not suitable (N). Fertilization, especially P fertilizer and organic fertilizer as well as making bunds in the direction of the contour, are recommended for the development of potato crops in Pangalengan.
Evaluation of soil compaction using the dynamic penetration index and the soil physical characteristics approach on agricultural land in the Ketonggo sub-watershed, Indonesia Mujiyo, Mujiyo; Lestari, Audi Soekma; Komariah, Komariah; Herawati, Aktavia; Irmawati, Viviana; Romadhon, Muhammad Rizky; Hardian, Tiara; Istiqomah, Nanda Mei
Journal of Degraded and Mining Lands Management Vol. 12 No. 5 (2025)
Publisher : Brawijaya University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15243/jdmlm.2025.125.8769

Abstract

Soil compaction is one of the problems faced due to land conversion in agriculture, directly impacting land productivity. This study aimed to identify the distribution of soil density with the Dynamic Penetration Index (DPI) method, the influence of land use, and the determinants of soil compaction, and provide recommendations to control soil density on agricultural land around the sub-watershed area. This research used an exploratory descriptive method, and sample points were determined by purposive sampling. There are 45 sample points determined based on the overlay map of soil type, land use, slope, and rainfall. The low DPI class has an area of 8,227 ha (34.34%), and the very low DPI class has an area of 15,729 ha (65.65%). The highest DPI value was in the plantation land use, and the lowest was in the rice field land use. Plantations experienced soil compaction due to intensive land use without soil quality restoration. The determining factors that affect soil compaction were porosity and bulk density. High porosity means low DPI values and, therefore, low compaction. High bulk density means high DPI value and therefore high compaction. Recommendations for land management include adding organic matter and tillage using a hoe or tractor to optimize soil compaction.
Automasi Irigasi di Lahan Pasir Pantai untuk Meningkatkan Produktivitas Tanaman Budidaya Herawati, Aktavia; Mujiyo; Herdiansyah, Ganjar; Syamsiyah, Jauhari; Lestari, Anik
JST (Jurnal Sains dan Teknologi) Vol. 12 No. 3 (2023): Oktober
Publisher : Universitas Pendidikan Ganesha

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23887/jstundiksha.v12i3.56096

Abstract

Lahan pasir pantai di Dusun Sogesanden, Desa Srigading, Kecamatan Sanden, Kabupaten Bantul, Daerah Istimewa Yogyakarta merupakan lahan sub-optimal yang memiliki keterbatasan biofisik lahan. Permasalahan utama budidaya di lahan pasir yaitu rendahnya efisiensi dan efektivitas penyiraman. Diperlukan sistem irigasi yang efisien dan efektif untuk menyediakan lengas yang cukup bagi tanaman. Tujuan penelitian ini adalah merakit dan mengimplementasikan teknologi automasi irigasi tetes pada lahan budidaya kacang tanah (Arachis hypogaea L.). Teknologi ini mampu memberikan air secara tepat kebutuhan dan sasaran yaitu pada zona perakaran tanaman. Metode yang digunakan adalah perakitan automasi sistem irigasi dengan alat monitoring kelembapan dan aplikasi penyiraman di lahan budidaya pasir pantai. Hasil penelitian menunjukkan bahwa sistem automasi irigasi telah berhasil dirakit dan diaplikasikan pada lahan pasir pantai, sistem berfungsi dengan baik. Sensor tanah mampu membaca kondisi lengas tanah dan mengirimkan data ke controller. Layar pada LCD menujukkan nilai kondisi lengas > 700 jika tanah dalam kondisi kering dan nilai lengas ≤420 jika tanah dalam kondisi basah. Keran otomatis akan membuka (>700) sehingga air dari tandon akan mengalir melalui selang menuju perakaran tanaman dan keran otomatis akan menutup dan menyetop aliran air dari tandon jika nilai lengas ≤420. Diperoleh efisiensi tenaga kerja siram mencapai 100% setelah menggunakan teknologi automasi irigasi irigasi tetes.
Assessing the Quality of Organic Fertilizer Products Made from Cow Dung in Wonogiri Regency, Indonesia Romadhon, Muhammad Rizky; Mujiyo, Mujiyo; Suntoro, Suntoro; Dewi, Widyatmani Sih; Syamsiyah, Jauhari; Rahayu, Rahayu; Widijanto, Hery; Herdiansyah, Ganjar; Herawati, Aktavia; Anggita, Akas; Hasanah, Khalyfah; Hardian, Tiara; Istiqomah, Nanda Mei; Irmawati, Viviana
Agroindustrial Journal Vol 10, No 2 (2023)
Publisher : Department of Agroindustrial Technology, Faculty of Agricultural Technology UGM

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/aij.v10i2.90130

Abstract

Kebonagung Sub-district, Sidoharjo District, Wonogiri Regency is the Wonoagung Wonogiri Organic Farming Association (PPOWW) location. Mitra is an organization engaged in organic rice and cattle cultivation. The conversion of bovine dung into organic fertilizer, particularly liquid fertilizer containing biological agents, is one of the waste elimination strategies employed to prevent environmental contamination. The nutrient content of organic fertilizer material sources varies. Organic fertilizer of high quality conforms to the Standard for Organic Fertilizers established by the Ministry of Agriculture of the Republic of Indonesia. Only some producers are aware of the standard quality requirements for organic fertilizer. It is necessary to analyze the nutrient content of organic fertilizer products to determine whether the quality of organic fertilizer is excellent. A preliminary survey of partner conditions, preparation of materials (organic fertilizer), and analysis of fertilizer content are among the activities performed. The C/N ratio of organic fertilizer is 8.41, and its pH is 7.6. The analysis results indicate that the Wonoagung Wonogiri Organic Agriculture Association's organic fertilizer products meet the liquid organic fertilizer quality standards. This condition demonstrates that the raw materials used in organic fertilizer production are of high quality and that the appropriate procedures have been followed. Adding biological agents to the production of organic fertilizer can enhance the quality of the finished product.
Analisis Perbedaan Pertumbuhan Zoysia japonica pada Penggunaan Naungan dan Pengaruh Pemberian Hormon Auksin dengan Media Tanam Pasir Rahayu; Herawati, Aktavia; Suntoro; Nawangsari, Relly Yunila
Jurnal Lanskap Indonesia Vol. 17 No. 2 (2025): Jurnal Lanskap Indonesia
Publisher : http://arl-faperta.ipb.ac.id/

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29244/jli.v17i2.57472

Abstract

Soccer is one of the most popular sports in the world including Indonesia. However, the development of soccer in Indonesia has been delayed, one of the causes is the lack of soccer sports facilities. The management of soccer stadiums in Indonesia still pays little attention to proper treatment to grow turfgrass in accordance with international standards from FIFA. Another type of grass that can be used as an alternative to soccer stadium turfgrass in Indonesia is Japanese grass (Zoysia japonica), this type of grass is chosen because it has pointed leaves so it will not be quickly damaged by soccer shoe spool. Therefore, this study aims to determine the characteristics of Zoysia japonica with various management, especially on the use of shade and the effect of auxin hormone administration which can be used as a reference recommendation for improving grass quality and grass management suitable for soccer stadiums in Indonesia. This study used a Split Plot design with two factors. The results showed that the interaction of shade treatment and auxin hormone had a very significant effect on all observation parameters. In an environment with 70% shade, Zoysia japonica can still survive, but its growth will be better if given 100% auxin hormone.
Assessment of Land Suitability in Highly Area of Ende, East Nusa Tenggara, Indonesia, as a Basic Strategy for Growing Coffee (Coffea arabica) Mujiyo, Mujiyo; Lutfi, Hilda Fadhila; Herawati, Aktavia; Cahyono, Ongko; Wahyuni, Sri; Mutiara, Charly; Lanamana, Willybrodus
Agrikultura Vol 36, No 3 (2025): Desember, 2025
Publisher : Fakultas Pertanian Universitas Padjadjaran

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24198/agrikultura.v36i3.64802

Abstract

Ende Sub-District, East Nusa Tenggara, has various topographies with an altitude of 0-1,100 m asl that can potentially grow Arabica coffee. Still, there is no information available regarding the suitability of the land. This study aims to evaluate the actual land suitability of Arabica coffee based on soil and environmental characteristics. The research method is descriptive explorative through a field survey approach supported by laboratory analysis. Determination of SMU (soil map unit) was carried out by purposive sampling through boring at 31 points, then classified based on soil type to obtain five pedons that represent SMU in Ende Sub-District. Soil sampling was carried out on each layer of each pedon. Data analysis used ANOVA and Pearson correlation tests to determine the determining factors that influence the land suitability class of Arabica coffee. The evaluation results showed that the actual land suitability for Arabica coffee was marginally suitable (S3) and unsuitable (N) classes, with limiting factors, i.e. average temperature, altitude, length of dry period, drainage, base saturation, available P, slope, and erosion hazard. The results of the ANOVA test showed that altitude significantly affected the land suitability class for Arabica coffee, with the best land suitability class at an altitude of 800-1,100 masl. Based on the correlation between land suitability class and land characteristic parameters, the determining factors for land suitability class include average temperature, humidity, drainage, texture, coarse material, total N, available K, erosion hazard, surface rocks, and rock outcrops. Land improvement recommendations are based on making an irrigation system, providing shade plants, N fertilization (urea fertilizer), K fertilization (KCl fertilizer), and terracing.
Recovery of soil carbon pools and C–N stoichiometry under drought in degraded tin-mined soils using organic, inorganic, and bio-amendments RAHAYU, RAHAYU; ERDASWIN, FARHAN; ROSARIASTUTI, RETNO; DEWI, WIDYATMANI SIH; FATIMAH, FATIMAH; HERAWATI, AKTAVIA; ICHSAN, NURUL
Asian Journal of Agriculture Vol. 9 No. 2 (2025)
Publisher : Smujo International

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.13057/asianjagric/g090248

Abstract

Abstract. Rahayu, Erdaswin F, Rosariastuti R, Dewi WS, Fatimah, Herawati A, Ichsan N. 2025. Recovery of soil carbon pools and C–N stoichiometry under drought in degraded tin-mined soils using organic, inorganic, and bio-amendments. Asian J Agric 9: 818-830. Large-scale tin mining on Bangka Island, Indonesia, has severely degraded soils, resulting in low carbon reserves and imbalanced C–N stoichiometry, particularly under seasonal drought. This study evaluated the effectiveness of an integrated amendment strategy to restore soil carbon pools and improve C–N stoichiometry under these challenging conditions. A 100-day screenhouse experiment was conducted on degraded tin-mined soil using a Completely Randomized Design. Treatments included municipal compost, dolomite, Lactic Acid Bacteria (LAB), and NPK fertilizer, applied individually and in combination. Key physicochemical properties, carbon pools, stoichiometric ratios, and their interrelationships were analyzed using ANOVA, Redundancy Analysis, and Pearson correlation. The integrated combination treatment was synergistically superior (ANOVA, p<0.01). The recovery of carbon pools was marked by a seven-fold surge in microbial biomass carbon to 703.73 mg kg-¹ and a near-doubling of the soil organic carbon stock to 29.21 Mg C ha-¹. The improvement in C–N stoichiometry was evidenced by the optimization of key microbial efficiency ratios, with the MBC/SOC ratio reaching 13.99% and the MBC/TN ratio increasing to 45.18%. Redundancy Analysis confirmed that compost-based treatments formed a distinct, functionally efficient group. Furthermore, Pearson correlation revealed the integrated nature of this recovery, showing a tight coupling between the accumulation of key carbon pools (SOC and MBC; r=0.909) and the enhancement of microbial C-use efficiency. In contrast, the dolomite amendment created a dysfunctional system by causing a massive accumulation of Dissolved Organic Carbon (DOC) to 279.18 mg kg-¹ without a corresponding increase in microbial biomass. A holistic, multi-ameliorant strategy anchored by a substantial organic matter base is essential for restoring ecosystem functions. This approach provides a robust and practical framework for the sustainable land management of degraded post-tin mining landscapes, offering a viable pathway to rebuild soil health and enhance drought resilience.
PENGEMBANGAN DESA WISATA JATISARI EDUPARK MELALUI PENINGKATAN KUALITAS SARANA PRASARANA DAN KELEMBAGAAN Sulistyono, If Bambang; Irianto, Heru; Riptanti, Erlyna Wida; Herawati, Aktavia
Kumawula: Jurnal Pengabdian Kepada Masyarakat Vol 9, No 1 (2026): Kumawula: Jurnal Pengabdian Kepada Masyarakat
Publisher : Universitas Padjadjaran

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24198/kumawula.v9i1.56454

Abstract

Jatisari Edupark is an innovative tourism village situated in Jatisari Village, Jatisrono District, Wonogiri Regency. Jatisari Edupark embodies the principles of ecotourism, agricultural education, outdoor activities, and gastronomic experiences. The objective of this initiative is to transform Jatisari Village into a tourism destination—Jatisari Edupark—by enhancing the level of services, infrastructure, and institutions. Since its debut in 2022, this tourism village has faced numerous challenges, including inadequate facilities and infrastructure for visitors. The identified root problems comprise the absence of shade due to a lack of shade-providing vegetation, limited and homogeneous outbound equipment facilities, unattractive photo opportunities, inadequate promotion of the tourist village, and the nonexistence of a Tourism Awareness Group (TAG) institution. The suggested remedies encompass the planting of shade trees, the introduction of outbound equipment, landscaping with flowering plants, the creation of promotional content for social media dissemination, and the enhancement of the institutional structure. The employed strategy involves active participation and engagement from the Jatisari Edupark managers, along with direct involvement in all activities, monitoring, and assessment of outcomes. The outcomes of the activities indicated that shade plants—namely pule and ketapang kencana trees—were planted, with ten specimens of each type. Landscaping involved the planting of diverse ornamental flora, including golden shower, tapak dara, chrysanthemum, sunflower, asoka, and bougainvillea. Outbound equipment has been supplied, comprising safety helmets and rafts for rafting and outbound activities. Furthermore, training on the development of promotional content for social media has been conducted. Consequently, the site has become increasingly shaded, the amenities for outdoor activities are now sufficient, and members of the Tourism Awareness Group have successfully uploaded promotional content on social media. Jatisari Edupark merupakan rintisan desa wisata yang berada di Desa Jatisari, Kecamatan Jatisrono, Kabupaten Wonogiri. Jatisari Edupark mengusung konsep wisata alam, edukasi di bidang pertanian, outbound dan kuliner. Tujuan dari kegiatan ini adalah pengembangan Desa Jatisari menjadi Desa Wisata Jatisari Edupark melalui peningkatan kualitas sarana dan prasarana serta kelembagaan. Berbagai permasalahan dihadapi dalam mengembangkan rintisan desa wisata ini sejak diresmikannya pada tahun 2022, diantaranya minimnya fasilitas sarana prasarana untuk wisatawan. Akar permasalahan yang ditemukan diantaranya kurang teduhnya lokasi karena belum ada tumbuhan peneduh, fasilitas peralatan outbound masih terbatas dan belum variatif, spot foto pemandangan yang kurang menarik, promosi desa wisata belum masif, dan belum adanya kelembagaan kelompok sadar wisata (Pokdarwis). Solusi yang ditawarkan meliputi penanaman tanaman peneduh, introduksi peralatan outbound, penataan lansekap dengan tanaman bunga, membuat konten promosi dan melakukan promosi di media sosial, dan penguatan kelembagaan Pokdarwis. Metode yang diterapkan adalah partisipatif aktif dari pengelola Jatisari Edupark dan pelibatan langsung di seluruh kegiatan, monitoring dan evaluasi hasil kegiatan. Hasil kegiatan diperoleh bahwa telah dilakukan penanaman tanaman peneduh yaitu tanaman pule dan ketapang kencana masing-masing sebanyak 10 pohon. Dilakukan penataan lansekap dengan menanam berbagai tanaman hias meliputi bunga jatuh emas, bunga tapak doro, bunga krisan, bunga matahari, bunga asoka dan bunga kertas. Telah dilakukan pemberian peralatan outbond berupa helm pengaman dan ban untuk rafting/outbond. Selain itu juga telah dilakukan pelatihan pembuatan konten promosi untuk diunggah di media sosial. Hasilnya, lokasi menjadi lebih teduh, sarana prasarana untuk outbond memadai, dan anggota kelompok sadar wisata mampu mengunggah konten di media sosial untuk promosi.
Pedotransfer functions for soil organic carbon stock and soil porosity interpretation in diverse palm oil plantation soils Tinuntun, Riris Srigayuh Tegarningtyas; Dewi, Widyatmani Sih; Mujiyo, Mujiyo; Herawati, Aktavia; Herdiansyah, Ganjar; Sumani, Sumani; Cahyo, Angger; Widjojo, Bagus Guritno; Prasetyo, Bangun Budi; Kotroczó, Zsolt
SAINS TANAH - Journal of Soil Science and Agroclimatology Vol 22, No 1 (2025): June
Publisher : Universitas Sebelas Maret

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20961/stjssa.v22i1.93460

Abstract

The accurate estimation of soil organic carbon stocks (SOCs) is crucial in sustainable oil palm plantation management. Pedotransfer functions (PTFs) serve as an essential predictive tool for enhancing the interpretation and estimation of soil organic carbon stocks (SOCs) and soil porosity. This study aims to improve the precision of SOCs and soil porosity predictions across diverse soil types within oil palm plantations through the application of PTFs. The study was conducted using a survey approach and descriptive exploration in an oil palm plantation in Seruyan District, Central Kalimantan. The study area encompassed four distinct soil types (Alfisols, Inceptisols, Ultisols, and Entisols), with six replicates for each soil type. Soil samples were collected from a depth of 0–60 cm. Statistical analyses included ANOVA, Tukey’s pairwise comparisons, correlation, and stepwise regression. The results indicated that soil types within oil palm plantations did not significantly affect SOCs but significantly impacted soil porosity. SOCs and porosity estimated using PTFs were lower than those estimated without PTFs. Specifically, SOCs analysis with PTFs ranged from 3.4 to 7.1 kg m-²; without PTFs, the range was higher, between 8.1 and 10.9 kg m-². Among the soil types, Entisols exhibited higher porosity with PTFs (51.3%), while Ultisols had the lowest porosity (37.9%). The PTFs provide better predictions for SOCs and porosity, and predictor variables that contribute the most are sand, silt, bulk density (BD), and cation exchange capacity (CEC). PTFs provide an advanced, data-driven approach to assessing SOCs and soil porosity in oil palm plantations, supporting the development of smarter, sustainable, and highly efficient management strategies.
Co-Authors Abib Tri Purnomo Abraham Suriadikusumah Ahmad Norri Prasetyo Aling Sangwidi Anggita, Akas Anik Lestari Azizah Nadia Rahmawati Bae, Eun Ji Cahya Anugrah Setya Irawan Cahyo, Angger Charly Mutiara Damayanti, Atika Sari Danar Susilo Wijayanto Dewi Sulistianingrum Dewi, Kurnia Mukti Diefa Nasywa Aedelia Dita Risky Novianti Dwi Priyo Ariyanto Dwisetio, Pertiwi Kurnia Dwiwiyati Nurul Septariani Emma Trinurani Sofyan ERDASWIN, FARHAN Erlyna Wida Riptanti Essla, Verona Putri Fahryzal Bintang Nugraha Fatchur Rochman fatimah Fatimah Febrianti Zulfa Maghfira Fitri Nurbaiti Fitriana Romdhati Fitriana, Ummi Nur Ganjar Herdiansyah Ganjar Herdiansyah Ganjar Herdiansyah Ganjar Herdiansyah, Ganjar Garuda Ardhana Geun Mo Yang Hardian, Tiara Hasanah, Khalyfah Heru Irianto Hery Widijanto Hery Widiyanto Indri Hapsari Pusponegoro Irmawati, Viviana Istiqomah, Nanda Mei Jaka Suyana Jauhari Syamsiah Jauhari Syamsiyah Jauhari Syamsiyah Jauhari Syamsiyah Jauhari Syamsiyah Jauhari Syamsiyah Justine Diaz Damara Komariah Komariah Komariah Komariah Komariah Kotroczó, Zsolt Lanamana, Willybrodus Lestari, Audi Soekma Lutfi, Hilda Fadhila Mahfud Arifin Mapan Rochmadtulloh Mo, Yang Geun Muhammad Ardenta Putra Sani Mujiyo Mujiyo Mujiyo Nawangsari, Relly Yunila Novianti, Dita Risky Nugroho, Diki Nur Faizaturrohmah NURBAITI, FITRI Nurul Farahin Ongko Cahyono Pangastuti, Triyana Suryaning Prasetyo, Bangun Budi Putri, Elvia Febriani Putri, Nuraini Dwi Agustina Rafirman, Rizkisadi Rahayu Rahayu Rahayu Rahayu Rahayu Rahayu Rahayu Rahayu Rahayu Rahayu Retno Rosariastuti Retno Rosariastuti Retno Rosariastuti Rochmadtulloh, Mapan Romadhon, Muhammad Rizky S Suntoro Saedi Bawana Salsabila, Harjayanti Auliyaa Sari, Safira Indrias Slamet Minardi Sri Hartati Sri Hartati Sri Wahyuni Sukamto, Ika Sumiyarsi Sulistyono, IF Bambang Sumani . Sumani Sumani Sumani Sumani Suntoro Suntoro Suntoro Suntoro Suntoro Supriyadi Supriyadi Supriyadi Supriyadi Susila, Afifah Afiana Sutarno Sutarno Sutarno Sutarno Sutarno Sutarno Sutarno Syamsyiah, Jauhari Tiara Hardian Tinuntun, Riris Srigayuh Tegarningtyas WIDHI LARASATI Widiastuti, Indah Widjojo, Bagus Guritno Widyatmani Sih Dewi Yang, Geun Mo Yogi Sukma Mahendra Yosua Yoga Setyawan