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All Journal Jurnal Ilmu Pertanian Indonesia Jurnal Ilmu Tanah dan Lingkungan (Journal of Soil Science and Environment) Indonesian Journal of Geography Journal of Tropical Soils Majalah Geografi Indonesia JURNAL ANALISIS KEBIJAKAN KEHUTANAN Journal of Degraded and Mining Lands Management AGRIVITA, Journal of Agricultural Science Jurnal Pengelolaan Sumberdaya Alam dan Lingkungan (Journal of Natural Resources and Environmental Management) Jurnal Tataloka MAJALAH ILMIAH GLOBE Journal of Regional and Rural Development Planning Seminar Nasional Lahan Suboptimal JURNAL SUMBER DAYA AIR Jurnal Tanah dan Iklim Jurnal Pusat Inovasi Masyarakat JME (Journal of Mathematics Education) Jurnal Geografi LIngkungan Tropik (Journal of Geography of Tropical Environments)
Dwi Putro Tejo Baskoro
Departemen Ilmu Tanah Dan Sumber Daya Lahan, Fakultas Pertanian, Institut Pertanian Bogor, Kampus IPB Dramaga, Bogor 16680
Agriculture, Biological Sciences & Forestry Humanities Biochemistry, Genetics & Molecular Biology Civil Engineering, Building, Construction & Architecture Earth & Planetary Sciences Economics, Econometrics & Finance Education Engineering Environmental Science Mathematics Social Sciences Other

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ANALISIS DAYA DUKUNG SUMBER DAYA AIR UNTUK MENINGKATKAN KETERSEDIAAN AIR DI KABUPATEN BANDUNG, JAWA BARAT Fayra Parahita; Dwi Putro Tejo Baskoro; Darmawan Darmawan
JURNAL SUMBER DAYA AIR Vol 18, No 2 (2022)
Publisher : Bina Teknik Sumber Daya Air, Kementerian Pekerjaan Umum dan Perumahan Rakyat

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32679/jsda.v18i2.721

Abstract

DAS Cisangkuy merupakan sumber utama dalam memenuhi kebutuhan air baku di wilayah Kota Bandung dan Kabupaten Bandung. Kondisi hidrologisnya saat ini telah mengalami penurunan yang ditunjukkan dengan tingginya fluktuasi aliran sungai. Tujuan penelitian ini yaitu untuk mengevaluasi perubahan penggunaan lahan dan ketersediaan air di DAS Cisangkuy serta untuk menyusun arahan rekomendasi penggunaan lahan untuk dapat meningkatkan ketersediaan air di Kabupaten Bandung berdasarkan hasil simulasi hidrologi Data yang digunakan antara lain  peta tata guna lahan, peta rencana tata ruang kabupaten bandung, penduduk,  kebutuhan air industri, debit, luas sawah, areal tambak ikan air tawar serta  jumlah hewan ternak. Secara ringkas, tahapan penelitian ini diawali dengan evaluasi perubahan penggunaan lahan untuk mendapatkan output antara berupa matriks perubahan penggunaan lahan dan inkonsistensi berdasarkan RTRW Kabupaten Bandung, kemudian menghitung neraca air dengan menggunakan model SWAT. Perubahan penggunaan lahan di DAS Cisangkuy dari tahun 2007-2017 terjadi dari tutupan lahan bervegetasi menjadi non-vegetasi yang berdampak pada sistem hidrologi dan ketersediaan air di DAS Cisangkuy. Potensi ketersediaan air permukaan di DAS Cisangkuy dengan skenario eksisting (tahun 2017) sebesar 495,58 juta m3 dan total kebutuhan air konsumsi pengguna sebesar 592,78 juta m3, sehingga terdapat defisit neraca air sebesar 97,20 juta m3.  Penerapan skenario perbaikan pengelolaan lahan melalui peningkatan luas pertanian lahan kering campur dengan metode agroforestri, melakukan reboisasi pada lahan hutan tanaman, penerapan sumur resapan pada permukiman dan penerapan terasering pada lahan sawah memberikan respon hidrologi yang cukup baik sehingga terjadi penurunan defisit air baku dari 174,91 juta menjadi 63,98 juta m3.Kata kunci: perubahan penggunaan lahan, kebutuhan air, ketersediaan air, neraca air,  DAS Cisangkuy
Alokasi Pemanfaatan Lahan Komoditas Unggulan Tanaman Pangan di Kabupaten Purwakarta Desy Fatmawati; Dwi Putro Tejo Baskoro; Dyah Retno Panuju
Jurnal Ilmu Pertanian Indonesia Vol. 28 No. 1 (2023): Jurnal Ilmu Pertanian Indonesia
Publisher : Institut Pertanian Bogor

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.18343/jipi.28.1.1

Abstract

Purwakarta Regency is one of the regencies in West Java Province that plays an essential role in agricultural development. One of the efforts to encourage sustainable agricultural development is by developing potential commodities so that scenarios can be drawn up that are in accordance with the region's potential. Optimum land use scenarios with several constraint targets need to be prepared by considering food needs, ecological sustainability, and farm income. This study aims to identify land available for food commodities and simulate the land use allocation of food commodities in Purwakarta Regency to meet food needs, farm income, and tolerance for erosion. Location quotient index, shift-share analysis, land suitability & capability analysis, and Multiple Goals Programming were used to achieve research objectives. The identified leading commodities are peanuts, cassava, and sweet potato. We suggest 15 classes of land available for optimum land use allocation. Space optimization is organized into four scenarios considering erosion control targets, meeting farmers' minimum incomes, and rice production. The smallest erosion is 13,159 tons/ha/year, while the highest possible income is IDR300,500,000,000. The highest rice production is 202.070 tonsGKP, cassava production is 16,919 tons, sweet potato is 2.014 tons, and peanut production is 531 tons. Achieving production targets can support agricultural development and food security improvement programs through sustainable production improvement. Keywords: erosion, farming, income, land suitability, MGP
THE EFFECTIVENESS OF COOPERATIVE LEARNING MODEL TYPE TEAMS GAMES TOURNAMENT (TGT) ON LEARNING OUTCOMES ON THE MATERIAL OF RATIONALIZING THE DENOMINATOR OF ROOT FORM Nabila Nurhaliza; Ratna Yestina; Agis Mulyani; Supratman .
JME (Journal of Mathematics Education) Vol 8, No 1 (2023): JME
Publisher : Universitas Sembilanbelas November Kolaka

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (298.764 KB) | DOI: 10.31327/jme.v8i1.1832

Abstract

Team Games Tournament (TGT) learning is well prepared with the right procedures, it will be better than conventional methods such as lectures that tend to be monotonous. This encourages researchers to conduct research with the title "The Effectiveness of the Team Games Tournament (TGT) Learning Model on Mathematics Learning Outcomes on the Material of Rationalizing Denominators of Root Forms". This study aims to analyze the effect of mathematics learning outcomes of class X IPA 1 MAN 1 Tasikmalaya City on the material of rationalizing the denominator of the root form presented with the Teams Games Tournament (TGT) learning model. The type of research used is quantitative with action research. Data collection techniques are done by observation and giving instruments in the form of pre-test and pot-test questions and minute papers. The sample was taken with purposive sampling technique so that 15 students were obtained as research subjects. Before conducting hypothesis testing, data requirements were first tested including: normality testing using SPSS 25 with the Shapiro Wilk Test and homogeneity testing using SPSS 25 with the Shapiro Wilk Test. Hypothesis testing using the t-test. The results of this study indicate that student learning outcomes in the material rationalize the denominator of the root form by using the Teams Games Tourbament (TGT) learning model there is a difference between the pre-test and post-test results. 
PENGARUH EMBUNG DAN KOMBINASINYA DENGAN TEKNIK KONSERVASI TANAH DAN AIR LAINNYA TERHADAP KOEFISIEN REGIM ALIRAN DAN KOEFISIEN ALIRAN TAHUNAN Rahman, Latief M; Nursari, Evi; Baskoro, Dwi Putro Tejo
Jurnal Geografi Lingkungan Tropik (Journal of Geography of Tropical Environments) Vol. 2, No. 2
Publisher : UI Scholars Hub

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

Abstract

Government of Indonesia planned to build 30.000 embung in 2017. Embung or mini reservoir is one of soil and water conservation methods to decrease surface runoff, enhance water surface retention, and increase water entering to the soil by infiltration, that finally influence the values of Discharge Ratio and Runoff Coefficient of a watershed. This research that was done in 2017 is about the effect of embung and it’s combination with other soil and water conservation technics (strip cropping and agroforestry) on Discharge Ratio (DR) and Runoff Coefficient (RC) in Cilemer Watershed by using SWAT method. The result shows that the Scenario 1 (mini reservoir technic alone) decreased DR and RC by 25.45% (from 119.70 to 94.25) and 32% (from 0.25 to 0.17), respectively. The Scenario 2 (combination of embung and strip cropping) decreased DR and Runoff Coefficient by 40.92% (from 119.70 to 78.78) and 32% (from 0.25 to 0.17), respectively. The Scenario 3 (combination of mini reservoir and agroforestry) decreased DR and RC by 41.38% (from 119.70 to 78.31) and 36% (from 0.25 to 0.16), respectively. The application of mini reservoir and its combination with other soil and water conservation (SWC) techniques were able to decrease DR and RC meaningfully.
Hydrological function of rewetted peatlands linked to saturated hydraulic conductivity in Kubu Raya, West Kalimantan, Indonesia Mahardika, Rabbirl Yarham; Tarigan, Suria Darma; Baskoro, Dwi Putro Tejo; Lovita, Vinni; Gangga, Adi; Asyhari, Adibtya; Fatoni, Arif; Jepri, Kristoporus; Ravelle, Adzan Pandu
Journal of Degraded and Mining Lands Management Vol. 11 No. 3 (2024)
Publisher : Brawijaya University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15243/jdmlm.2024.113.5717

Abstract

The hydrological function of peatlands, one of which is acting as a medium for storing and releasing water, undergoes alteration due to degradation. Saturated hydraulic conductivity (Ks) is a pivotal parameter for comprehending the hydraulic properties of peatlands. Ks plays a crucial role in the transmission and release of water influenced by other peat properties. This research examined the impact of Ks and selected peat properties, namely bulk density and available water content, to depict the hydrological function in rewetted peatlands. The study sites are rubber plantation (RB), oil palm plantation (OP), and drained secondary forest (SF). Results revealed a significantly higher Ks in OP (106.7 cm hr-1) compared to RB (19.56 cm hr-1) and DSF (15.1 cm hr-1). The hydrological function at all study sites was categorized as high, with minor degradation in OP and moderate degradation in RB and SF. Nonetheless, these findings necessitate fundamental interpretation and adjustment. The outcomes of this study can be utilized to prioritize rewetting efforts in the study sites, emphasizing the importance of prioritizing immature peat (fibric) with high Ks.
Evaluasi Algoritma Machine Learning untuk Klasifikasi dan Prediksi Penggunaan Lahan Nugraha, Fajar; Baskoro, Dwi Putro Tejo; Tarigan, Suria Darma
Majalah Geografi Indonesia Vol 39, No 1 (2025): Majalah Geografi Indonesia
Publisher : Fakultas Geografi, Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/mgi.99150

Abstract

Abstrak. Pemantauan, perencanaan, dan pengelolaan sumberdaya lahan membutuhkan data penggunaan lahan yang akurat. Banyak penelitian telah dilakukan mengenai klasifikasi dan prediksi penggunaan lahan. Namun, penelitian terkait penentuan metode klasifikasi dan prediksi yang akurat masih sangat penting. Penelitian ini bertujuan untuk mengevaluasi algoritma machine learning dalam klasifikasi dan prediksi penggunaan lahan serta menganalisis perubahan penggunaan lahan tahun 2002- 2032. Area studi penelitian ini yaitu Sub DAS Tanralili, klasifikasi menggunakan Dzetsaka dengan algoritma seperti kNN, GMM, RF, dan SVM, dan prediksi menggunakan MOLUSCE dengan model CA yang dikombinasi dengan ANN, LR, WoE, dan MCE. Model dievaluasi menggunakan overall accuracy dan kappa, akurasi tertinggi pada tahun 2002, 2012, dan 2022 masing-masing adalah kNN (kappa 0,92), SVM (kappa 0,86), dan GMM (kappa 0,74). Algoritma SVM memiliki kappa rata-rata tertinggi untuk klasifikasi sebesar 0,83, sedangkan model CA-ANN menunjukkan nilai kappa tertinggi untuk prediksi sebesar 0,65. Pada periode 2002-2022, terjadi penurunan hutan sekunder (4.184,0 ha), pertanian lahan kering (1.259,3 ha), dan badan air (328,0 ha), sedangkan peningkatan pada semak belukar (5.303,3 ha), sawah (367,0 ha), padang rumput (64,5 ha), dan permukiman (36,5 ha). Pada periode 2022-2032 menunjukkan penurunan hutan sekunder (554,2 ha), sawah (332,6 ha), padang rumput (192,8 ha), dan badan air (33,4 ha), sedangkan peningkatan pada semak belukar (700,9 ha), pertanian lahan kering (401,1 ha), dan permukiman (1,1 ha). Abstract. Monitoring, planning, and managing land resources require accurate land use data. Many studies have been conducted on land use classification and prediction. However, research related to determining accurate classification and prediction methods is still very important. This study aimed to evaluate machine learning algorithms in land use classification and prediction and analyzed land use change from 2002 to 2032. The study area of this research was the Tanralili Sub Watershed, with classification using Dzetsaka and algorithms such as kNN, GMM, RF, and SVM, and prediction using MOLUSCE with the CA model combined with ANN, LR, WoE, and MCE. The models were evaluated using overall accuracy and kappa; the highest accuracy in 2002, 2012, and 2022 were kNN (kappa 0.92), SVM (kappa 0.86), and GMM (kappa 0.74), respectively. The SVM algorithm had the highest average kappa for classification at 0.83, while the CA-ANN model showed the highest kappa value for prediction at 0.65. In the period 2002-2022, there was a decrease in secondary forests (4,184.0 ha), dry land agriculture (1,259.3 ha), and water bodies (328.0 ha), while an increase in shrubs (5,303.3 ha), rice fields (367.0 ha), grasslands (64.5 ha), and settlements (36.5 ha). The 2022-2032 period predicted a decrease in secondary forests (554.2 ha), rice fields (332.6 ha), grasslands (192.8 ha), and water bodies (33.4 ha), while an increase in shrubs (700.9 ha), dry land farming (401.1 ha), and settlements (1.1 ha). Submitted: 2024-08-14 Revisions:  2024-11-13 Accepted: 2025-02-17 Published: 2025-02-17 
Coal fly ash amendment: affecting soil resistance, water retention, and root growth in sandy soils Jubaedah, Jubaedah; Iskandar, Iskandar; Baskoro, Dwi Putro Tejo; Mulyanto, Budi; Nurida, Neneng Laela; Yustika, Rahmah Dewi; Maswar, Maswar
Journal of Degraded and Mining Lands Management Vol. 12 No. 4 (2025)
Publisher : Brawijaya University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15243/jdmlm.2025.124.8421

Abstract

Studies have shown that coal fly ash (CFA) can improve soil physical properties (such as bulk density) and increase available water content. However, its pozzolanic properties may also contribute to soil compaction. The overall impact of these contrasting effects on soil behavior remains insufficiently understood. This study investigated the effects of CFA amendment on soil resistance, water retention, and corn root growth in sandy soil. Using a completely randomized design, the research was conducted at the Taman Bogo Agricultural Station in East Lampung for two planting seasons (October 2022 - June 2023). Four CFA rates (0%, 3%, 6%, and 12% w/w) were applied in lysimeter plots with five replications. The results demonstrated that CFA application reduced soil bulk density (BD) at 6% and 12% rates due to CFA’s lower BD than the soil. However, higher CFA doses increased soil penetration resistance (PR), likely due to surface crust formation rather than pozzolanic reactions. Plant available water capacity (PAWC) significantly increased by 6% and 12% CFA, thus improving soil water retention. Improving physical properties in the second season promoted root growth at the 12% CFA rate. The use of CFA in sandy soils leads to improvement in selected physical properties and enhances water retention. Therefore, while CFA enhances water retention, its effects on soil compaction and root growth must be carefully managed to ensure optimal results.
Parameter Sensitivity Test of SWAT Hydrological Model On Two Different Resolutions (A Case Study of Upper Cisadane Subbasin, West Java) Alim, Nurmaranti; Tarigan, Suria Darma; Tejo Baskoro, Dwi Putro; Wahjunie, Enni Dwi
JOURNAL OF TROPICAL SOILS Vol. 23 No. 1: January 2018
Publisher : UNIVERSITY OF LAMPUNG

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.5400/jts.2018.v23i1.47-53

Abstract

A sensitivity analysis of SWAT parameters was conducted on different spatial resolutions. The sensitivity analysis aimed to determine the input parameters that have the most impact on the of output of the model. Resolution of different inputs in the SWAT analysis can produce different input parameters that can affect the output. The purpose of this study was to identify the level of sensitivity of the parameters used in the SWAT model simulated on two different resolutions, i.e. 1: 100,000 and 1: 250,000. A sensitivity test was conducted manually using the absolute sensitivity method, i.e. a method to test the sensitivity of the parameters of SWAT model that can change (either increase or decrease) one by one while the other parameters are constant. The results show that the Nash-Sutcliffe Efficiency (NSE) coefficients derived after calibration of the SWAT models on both resolutions of maps indicate similar performance of the models, with the category for the daily simulation of excellent (NSE coefficients of 0.55 and 0.54), while the monthly simulation is categorized as very satisfactory (NSE coefficients of 0.80 and 0.82). The sensitive parameters of the SWAT model identified in the current study include CN2 (initial SCS runoff curve number for moisture condition II), Alpha_BNK (flow recession constant or recession proportional to the banks of the river), CH_K2 (effective hydraulic conductivity in main channel alluvium), CH_N2 (Manning’s “n” value for the main channel), ESCO (soil evaporation compensation factor), GW_Delay (groundwater delay), and GW_Revap (groundwater “revap” coefficient).  
CO2 Flux from Tropical Land Uses on Andisol in West Java, Indonesia Hendri, Jon; Sumawinata, Basuki; Baskoro, Dwi Putro Tejo
JOURNAL OF TROPICAL SOILS Vol. 19 No. 3: September 2014
Publisher : UNIVERSITY OF LAMPUNG

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.5400/jts.2014.v19i3.121-130

Abstract

This study measured CO2 flux by segregating effect of root respiration and organic matter decomposition by microbes. The study involved a mineral soil containing high organic matter (Andisols), in the tropic devoted to different land uses i.e. natural forest, tea plantation, and horticultural farm CO2 emission from those land uses were compared to from peatland. Observed CO2 fluxes came out in the following order: bare plot  7.32, tea plantation  10.22, horticultural farm  15.60, and natural forest  15.62 Mg C-CO2 ha-1 yr-1. While, root respiration accounted for substantial proportions: tea plantation  28%, horticultural farm  53%, and natural forest  53%. Soil temperature demonstrated a significant positive correlation with the CO2 flux, except in the natural forest. On the other hand, water-filled pore spaces displayed varying correlation with site CO2 flux: a negative relationship in both bare plot and tea plantation, appreciably positive in the horticultural farm, and weakly related in the natural forest. Soil respiration and C-organic content appeared to be strongly correlated; the rate of soil respiration increased with higher C-organic content. In field, CO2 flux from organic matter decomposition in Andisols, Latosols, and peatland ranged from 5.35-13.22 Mg C-CO2 ha-1 yr-1, with root respiration contributing most of the flux, which was, in turn, influenced by type vegetation, humidity and soil temperature.Keywords: CO2 flux; decomposition; horticultural farm; natural forest; organic matter; tea plantation [How to Cite: Jon H, Suwardi, B Sumawinata and DPT Baskoro. 2014. CO2 Flux from Tropical Land Uses on Andisol in West Java, Indonesia. J Trop Soils 19: 121-130. Doi: 10.5400/jts.2014.19.3.121]     
Soil Aggregate Stability Index on Agricultural, Plantation, and Forest Lands Hidayat, Yayat; Baskoro, Dwi Putro Tejo; Purwakusuma, Wahyu; Siregar, Mariana Sella; Ramadhi, Muhammad Haris Achyar
Jurnal Ilmu Tanah dan Lingkungan Vol 27 No 2 (2025): Jurnal Ilmu Tanah dan Lingkungan
Publisher : Departemen Ilmu Tanah dan Sumberdaya Lahan, Fakultas Pertanian, IPB University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29244/jitl.27.2.56-62

Abstract

The soil aggregate stability index is one of the critical indicators of soil physical quality, primarily related to the soil's ability to absorb water into the soil and the soil's resistance to rainwater splashing and surface flow erosion in the soil erosion process. The study aimed to determine the soil aggregate stability index class criteria using the dry and wet sieving methods on the OSK 10701 sieve type and to identify the stability of soil aggregates on agricultural land, plantations, and forests around the IPB Dramaga campus. The transformation of the soil aggregate stability class criteria from the conventional sieve to the OSK 10701 sieve types gave excellent results with a coefficient of determination (R2) of 0.89. The soil aggregate stability index differs significantly between soil types and land uses. Podsolic Jasinga has a higher aggregate stability index than Podsolik Dramaga, Regosol Dramaga, and Latosol Dramaga in the upper layer (0-20 cm) and the lower layer (20-40 cm). Forests have a better aggregate stability index than conservation agricultural land, conventional agricultural land, rubber plantations, and oil palm plantations. The difference in stability index between land uses is closely related to soil organic matter contents. Although the soil is denser/more compact, the soil in oil palm and rubber plantations has a lower stability index and is classified as unstable.
Co-Authors A Akbar Aditia Sapto Utomo Affan Chahyahusna Agis Mulyani Alim, Nurmaranti Andrea Emma Pravitasari, Andrea Emma Andria Harfani Qalbi Ansori Ansori Araswati, Fulki Dwiyandi Asti Nurmilah Astrid Aryani Ndun Asyhari, Adibtya Baba Barus Balqis Nur Aisyah Basuki Sumawinata Benadikta Widjayatnika Boedi Tjahjono Budi Mulyanto Carolyn, Rully Dhora Darmawan Darmawan Darmawan Darmawan Desy Fatmawati Diyah Novita Kurnianti Dyah Retno Panuju Elianah Elvina Nora Lubis Enni Dwi Wahjunie Enny Dwi Wahyunie Ernan Rustiadi Evi Nursari Evi Nursari Fajar Nugraha Fatmawaty Fatmawaty, Fatmawaty Fatoni, Arif Fayra Parahita Gangga, Adi Gilang Munggaran Harisman Edi Hendi Hendra Bayu Henry D. Manurung Iman Sadesmesli Irvan Zidni Iskandar Iskandar Jepri, Kristoporus Jon Hendri JUBAEDAH JUBAEDAH, JUBAEDAH Khursatul Munibah Komarsa Gandasasmita Kukuh Murtilaksono Kukuh Murtilaksono Kukuh Murtilaksono Latief M Rahman Latief Mahir Rachman Leonard Kristofery LILIK BUDIPRASETYO M. Galih Permadi Mahardika, Rabbirl Yarham Mahartika Setianingsih Malahayati, Sri Marisa Dwi Putri Maswar Maswar Maudy Susanti Mohammad Sofyan Muhammad Yahya Fadhil Nabila Nurhaliza Navisha Maulita Dewi Neneng Laela Nurida Nur Etika Karyati Nuraida Nuraida Nurmaranti Alim Nursari, Evi Omo Rusdiana Oteng Haridjaja Parahita, Fayra Purwakusuma, Wahyu Putri, Savitri Khairunnisa Rahmah Dewi Yustika, Rahmah Dewi Rahman, Latief M Ramadhi, Muhammad Haris Achyar Ratna Yestina Ravelle, Adzan Pandu Reni Kusumo Tejo Selamet Kusdaryanto Seniarwan Seniarwan Siregar, Mariana Sella Suria Darma Tarigan Surya Darma Tarigan Syaiful Anwar Tiwi Astriani Toga Pandapotan Sinurat Vinni Lovita Widiatmaka Wistha Nowar Yayat Hidayat Yusuf, Sri Malahayati Zluyan Firdaus Afif