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Correlation of Soil Chemical, Biological, and Physical Characteristics on Productivity of Maize in Cibugel District, Sumedang Regency Alifa Salsabila Anindya; Marenda Ishak Sonjaya Sule; Betty Natalie Fitriatin
Paspalum: Jurnal Ilmiah Pertanian Vol. 12 No. 1 (2024)
Publisher : Lembaga Penelitian dan Pengabdian Universitas Winaya Mukti

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35138/paspalum.v12i1.685

Abstract

Maize as one of the national food commodities, experiences an increase in demand every year. Both internal and external factors influenced the growth of corn plants. Internal factors originated from the plant, such as inherited genetic traits, while external factors came from the environment, including soil properties and climate. External factors that affected plant growth included biological, physical, and chemical soil characteristics. This research aimed to understand the interrelation between soil acidity (pH), phosphorus availability (P), cation exchange capacity (CEC), nitrogen-fixing bacteria, earthworm population, carbon-nitrogen ratio (C/N), and soil texture on the productivity of maize in Cibugel District and how these factors were interconnected to support plant growth. The research employed a descriptive survey and comparative method, with soil samples taken from 18 soil samples from six villages in the Cibugel Subdistrict, Sumedang Regency. The correlation analysis results showed a significant positive relationship between cation exchange capacity and corn productivity and a significant negative relationship between available phosphorus and corn productivity. This implied that increasing cation exchange capacity could enhance productivity while increasing available phosphorus could decrease productivity. The research aided in identifying soil characteristics influencing high land productivity in the area. 
Effect of NPK and Bacillus-coated NPK fertilizer on biomass, nutrient content in soil and nutrient uptake by lettuce Hindersah, Reginawanti; Setiawati, Mieke Rochimi; Suryatmana, Pujawati; Fitriatin, Betty Natalie; Aditya, Fasa; Nugraha, Gita Bina; Risanti, Rara Rahmatika; Asmiran, Priyanka
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.v22i1.43608

Abstract

The Inoculation of beneficial soil microbes is an effective method for lowering doses of inorganic fertilizers. This study was aimed to observe and compare the effect of doses and formulas of Bacillus-coated NPK (BCN) and conventional NPK fertilizers on biomass, major macro-nutrient in soil and their uptake by shoots of lettuce (Lactuca sativa L.); as well as evaluate the potency of BCN for decreasing doses of NPK fertilizers. The greenhouse experiment was set up in a randomized block design with seven treatments and five replications. The treatments included one and a half doses of recommended NPK fertilizer and two BCN fertilizer formulas; control treatment was without any fertilizer. This experiment showed that NPK fertilizer had comparable effect with BCN on growth traits; but application of NPK and coated NPK had a potency to increase the fresh weight of lettuce up to 24-45% which was in line with the increase of shoot-to-roots ratio. The potassium (K) content in soil and their uptake in lettuce shoots depend on doses and type of NPK but Nitrogen (N) and Phosphorus (P) content in soil and in shoot were not determined by treatments. The results showed that the recommended NPK dose (200 kg/ha) for lettuce can be reduced up to 50%; moreover, 50% of BCN enabled to maintain the N, P and K uptake as well as the lettuce yield.
Phosphate availability, P-uptake, phosphatase, and yield of maize (Zea mays L.) affected by kaolin based P-solubilizer and P fertilizer in Inceptisols Fitriatin, Betty Natalie; Budiman, Muhammad Nafariz; Suryatmana, Pujawati; Kamaluddin, Nadia Nuraniya; Ruswandi, Dedi
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.v22i1.42847

Abstract

Inceptisols have problem in phosphate availability. Soil P content is very low available to plants because it is bound by soil colloids. One of the efforts to increase the P nutrient in the soil in a sustainable way by using P-Solubilizers that can dissolve phosphate in the soil so that it is available for plants. The purpose of experiment was to determine the effect of the combination dose of kaolin based P-Solubilizer and P fertilizer for improving P availability, P uptake, phosphatase, and maize yield on Inceptisols. The kaolin-based P-Solubilizer was used a consortium of phosphate solubilizing microbes (PSM) consisting of Bacillus subtilis, Burkholderia cepacea, Pseudomonas mallei, and Trichoderma asperellum. This experiment was conducted in the experimental field of the Laboratory of Soil Chemistry and Plant Nutrition, Faculty of Agriculture, Universitas Padjadjaran, Jatinangor, from July to December 2021. The experiment used a randomized block design (RDB) method with nine treatments and three replications, with details of 0 P-Solubilizer + 0 P-fertilizer; 100% P-fertilizer; 100% P-solubilizer; and combination 50%, 75 %, 100%, and 150% P-solubilizer with 50%, 75%, and 100% P-fertilizer. P-solubilizer 100% recommended dose 50 kg ha-1 and P-fertilizer recommended dose 100 kg ha-1. The results showed that the dose of 100% P-Solubilizer (50 kg ha-1) + 75% P (75 kg ha-1) showed the best results in increased P-availability (346,93%), P-uptake (312,5%), Phosphate activity (33,5%), and maize yields (48,09%) compared to without application of P-solubilizer and P-fertilizer. This consortium isolate could be developed as a P-Solubilizer with the ability to increase the efficiency of P up to 25%.
Urea Berlapis Bakteri untuk Mengurangi Dosis Pupuk Urea pada Budidaya Kentang Hindersah, Reginawanti; Suryatmana, Pujawati; Fitriatin, Betty Natalie; Asmiran, Priyanka; Nurbaity, Anne; Setiawati, Mieke Richimi
Jurnal Penelitian Pertanian Terapan Vol 24 No 1 (2024)
Publisher : Politeknik Negeri Lampung.

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25181/jppt.v24i1.2750

Abstract

Urea fertilizers and biofertilizers play an important role in potato (Solanum tuberosum L.) cultivation, but urea fertilizers are volatile and leach out easily that reduce their effectiveness. Urea coated with beneficial bacteria-enriched organic matter is expected to increase nitrogen used efficiency. The purpose of the experiment was to determine the ability of bacterial-coated urea (BCU) included Bacillus and Azotobacter to improve the growth, nutrient status and yields of potatoes grown in field; as well as to reduce urea dose. The experiment was setup in randomized block design with five treatments and six replications. The treatments were four combinations of the dose and formulation of BCU; and conventional urea fertilizer as control treatment. Application of both BCU formulation increased plant height as well as N and P uptake particularly when the recommended dose was used.  In contrast, the doses and formulation of BCU did not affect chlorophyll content. Application of BCU-A or BCU-B at the rate of 200 kg/ha increased tuber weight by 59% and 81% respectively.  Both high and low dose of BCU did not reduce the vegetative growth and yield compared to the plants fertilized with conventional urea. This experiment showed that BCU is considered to reduce the rate of Urea in potatoes cultivation.
PEMANFAATAN SUMBER DAYA HAYATI UNTUK MENINGKATKAN PERTUMBUHAN DAN HASIL JAGUNG DI DESA CILELES KECAMATAN JATINANGOR Fitriatin, Betty Natalie
Dharmakarya Vol 13, No 1 (2024): Maret, 2024
Publisher : Universitas Padjadjaran

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24198/dharmakarya.v13i1.50356

Abstract

Upaya pemahaman kepada petani tentang pemanfaatan sumber daya hayati untuk dijadikan pupuk organik cair perlu ditingkatkan melalui sosialisasi dan praktek pembuatan pupuk organic cair dan mikrooganisme lokal untuk mengurangi kebutuhan pupuk kimia serta menerapkan pertanian berkelanjutan. Aplikasi pupuk organik cair  yang dibuat dengan bahan limbah  pertanian dan limbah sayuran  di lahan petani secara langsung merupakan contoh untuk penerapan sistem pertanian berkelanjutan (ramah lingkungan). Tujuan kegiatan pengabdian kepada masyarakat yang dilaksanakan di Kawasan Kecamatan Jatinnagor  ini memberikan  informasi dan keterampilan kepada masyarakat melalui penyuluhan dalam bentuk ceramah, praktek lapangan (demplot), dan diskusi pada temu lapang tentang upaya pemanfaatan sumber daya hayati untuk meningkatkan produksi tanaman dan mengurangi kebutuhan pupuk anorganik. Metode kegiatan pengabdian kepada masyarakat ini berupa penyuluhan, praktek pembuatan pupuk organic cair atau mikroorganisme lokal dan demonstrasi plot. Pupuk organik cair hasil pembuatan oleh masyarakat yang digunakan dalam demontrasi plot terdiri dari dua formula yaitu formula A dengan bahan dasar limbah buah-buahan dan daun-daunan dengan tambahan air cucian beras sebagai pelarut dan sumber energy. Sedangkan formula B yaitu bahan dasar dari sayuran.  Hasil demonstrasi plot menunjukkan bahwa aplikasi pupuk organic cair dapat meningkatkan pertumbuhan tanaman serta mengurangi dosis pupuk NPK. 
Effect of biofertilizer with reduced dose of nutrient solution on yield of Pak Choy on Nutrient Film Technique System Hindersah, Reginawanti; Maulana, Nurzen; Damayani, Maya; Setiawati, Mieke Rochimi; Suryatmana, Pujawati; Fitriatin, Betty Natalie; Setiawan, Ade
Soilrens Vol 21, No 2 (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.v21i2.53445

Abstract

The Nutrient Film Technique (NFT) in hydroponic crop production systems generally uses chemical nutrient solutions to provide plant nutrients, even though biofertilizer inoculation can enrich liquid nutrients. The purpose of this experiment was to observe the effect of liquid biofertilizers applied with chemical nutrient solutions on changes in the acidity and electrical conductivity of nutrient solutions, as well as the growth and yields of pak choy (Brassica rapa L.) grown in Nutrient Film Technique. This experiment was set up in a completely randomized design with three nutrient solution treatments and eight replications. The treatments included the application of 100% chemical nutrient solution (control), and 75% and 50% concentrations of chemical nutrient solution enriched with a consortium biofertilizer. The results showed that at the end of the experiment, the acidity of all nutrient solutions increased, but their electrical conductivity (EC) was reduced. The fresh weight of pak choy shoots in medium B (75% chemical nutrition with biofertilizers) was 34% lower than the control (A), although statistically it was not significant. However, 50% chemical nutrition with biofertilizers produced the same shoot weight as the recommended dose of chemical nutrition. Moreover, 75% chemical nutrient with biofertilizers increased root weight. This current experiment verified that a reduced concentration of nutrient solution enriched with biofertilizer can be used to maintain the yield of pak choy grown in NFT.
Application of Soil Conditioner, Nutrient Solution with Biofertilizer to Improve Soil Bio-chemical Properties on Red Chili Plant Fitriatin, Betty Natalie; Putri, Envry Artanti Duidahayu; Simarmata, Tualar
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.v22i1.57230

Abstract

Plant productivity is influenced by soil quality and availability of plant nutrients. Soil conditioner can improve soil quality by enhancing soil properties. Both macro and micronutrients can be fulfilled through application of nutrient solution containing macro and micronutrients and biofertilizer. This experiment was conducted from at experimental field of the Faculty of Agriculture, Universitas Padjadjaran to test the combination of soil conditioner, NPK fertilizer, nutrient solution (NS), and biofertilizer (BF) effects on soil biological and chemical properties and red chili growth. The experiment was designed using a Randomized Block Design with seven treatments and four replications. The treatments consisted of control, combination of NPK and NS with a dose of 0, 6, and 12 kg.ha-1 BF contained Azotobacter sp., Azospirillum sp., and Pseudomonas sp.. The doses used for a single application were 15 gplant-1 NPK and 300 mLplant-1 NS. Manure was applied to the control treatment and soil conditioner to the other treatments as a basic fertilizer at a dosage of 4 ton.ha-1. The results showed that the combination of soil conditioner, NPK fertilizer, nutrient solution, and biofertilizer had significant effects on soil biological properties and red chili growth, but didn’t show significant effect on soil chemical properties. The combination of soil conditioner + NPK + 12 kg.ha-1 BF increased soil fungal population (113,4 x 103 CFU.mL-1) and bacterial population (599,5 x 108 CFU.mL-1). Meanwhile, the combination of soil conditioner + NS + 6 kg.ha-1 BF increased plant height (60,48 cm).
Pengaruh Pemupukan Bakteri Pelarut Fosfat Dan Dosis Batuan Fosfat Terhadap Ketersediaan Fosfor Pada Tanah Budidaya Tanaman Jagung (Zea Mays L.) Di Ultisol Kentrong Yanti Ningtyas, Dewi Nurma; Fitriatin, Betty Natalie; Setiawati, Mieke Rochimi; Simarmata, Tualar
Jurnal Ekonomi Pertanian dan Agribisnis Vol. 2 No. 1 (2024): Juli - Desember
Publisher : CV.ITTC INDONESIA

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.62379/jepag.v2i1.1941

Abstract

The use of Ultisols for plant cultivation has constraints, namely the nature of the soil is acidic and the availability of phosphate for plants is low. The use of Rocks Phosphate (RP) and Phosphate Solubilizing Bacteria (PSB) can be used as an alternative to increasing the availability of phosphate for environmentally friendly plants. PSB has the potential to increase the solubility and availability of phosphate in plants. The increase in the availability of phosphate for plants can be through the enzyme phosphatase and organic acids produced by PSB. This study aims to examine the effect of the type of PSB consortium and the dose of Rocks Phosphate on P uptake and growth of maize in Ultisols from Kentrong. The research was conducted at the Ciparanje Experimental Garden, Faculty of Agriculture, Padjadjaran University, Jatinangor. The design used was a randomized block design with factorial pattern consisting of phosphate solubilizing bacteria (without the PSB consortium, exogenous PSB consortium, indigenous PSB consortium, and mixed consortium) and Rocks Phosphate dosage (100% SP-36, 100% RP, 80% RP, 60% RP) with three replications. The results showed no interaction between the type of PSB consortium and the dose of Rocks Phosphate. The results of the independent effect showed that the treatment of using SP-36 was the best treatment in available P.
Bioassay of phosphorus solubilizing isolates for enhance P solubility and growth of rice (Oryza sativa L.) Fitriatin, Betty Natalie; Manurung, Dahlia Florencia; Setiawati, Mieke Rochimi
Jurnal AGRO Vol 9, No 1 (2022)
Publisher : Jurusan Agroteknologi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15575/17754

Abstract

Fosfat merupakan salah satu unsur yang berperan penting bagi pertumbuhan tanaman dan kesuburan tanah. Namun, ketersediaan unsur P terlarut yang dapat diserap oleh tanaman sangat kecil karena berikatan dengan kation yang berada di dalam tanah. Salah satu upaya dalam meningkatkan P tersedia dalam tanah adalah dengan pemanfaatan agen hayati Bakteri Pelarut Fosfat (BPF). Penelitian ini bertujuan untuk menguji isolat BPF yang dapat meningkatkan kelarutan P dan pertumbuhan padi pada uji hayati. Percobaan ini dilaksanakan di Rumah Kaca Departemen Ilmu Tanah dan Sumber Daya Lahan, Fakultas Pertanian, Universitas Padjadjaran. Rancangan percobaan yang digunakan adalah Rancangan Acak Kelompok (RAK) dengan 6 perlakuan dan 5 ulangan. Masing-masing perlakuan jenis bakteri adalah kontrol, Bacillus substilis, B. megatherium, Pseudomonas mallei, Burkholderia sp., dan isolat campuran. Hasil percobaan menunjukkan isolat BPF yang diuji memiliki kemampuan yang bervariasi dalam meningkatkan enzim fosfatase, kelarutan P, dan pertumbuhan padi pada uji hayati. Lebih lanjut, perlakuan BPF campuran memberikan pengaruh lebih baik terhadap aktivitas fosfatase, P terlarut dan pertumbuhan padi dibandingkan isolat tunggal.ABSTRACTPhosphorus is an element that important for soil fertility and plant growth. However, the phosphate nutrient can be uptaken by plants only in a small amount because it binds to cations in the soil. The effort for enhancing the soil P availabilty is by the phosphorus solubilizing bacteria (PSB). This study aimed to test PSB  isolates  for increasing P solubility and rice growth using bioassay. The experiment conducted at the greenhouse in Jatinangor District, Sumedang Regency, West Java with  Randomized Block Design (RBD) for PSB isolates with five replications. Each type of bacteria treatment was control, Bacillus substilis, B. megatherium, Pseudomonas mallei, Burkholderia sp., and mixed isolates. The results showed that the P solubilizing  isolates had various abilities to enhance phosphatase, P solubility, and rice growth using bioassay. Furthermore, the mixed PSB isolates had a better effect on phosphatase activity, dissolved P and rice growth than single isolates.
The influence of ameliorant, nutrient solution and bioferilizer on soil P, plant P uptake, and yield of red chili. Fitriatin, Betty Natalie; Dupa, Putri Siska Ekayanti; Fauziah, Nicky Oktav; Wong, Mui-Yun; Simarmata, Tualar
Jurnal AGRO Vol 11, No 1 (2024)
Publisher : Jurusan Agroteknologi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15575/35886

Abstract

The productivity and quality of red chili are greatly influenced by soil conditions and the availability of nutrients. Nutrients play a critical role in the growth and development of red chili plants. This experiment aimed to determine the combination of ameliorant, nutrient solution, and biofertilizer on the population of phosphate-solubilizing bacteria (PSB), available P, P-uptake, and red chili production in Inceptisols. The experiment was conducted at the experimental field of the Faculty of Agriculture, Universitas Padjadjaran. The experiment used a Randomized Complete Block Design (RCBD) with seven treatments and four replications, consisting of control, NPK, and nutrient solution (NS) with doses of 0, 6, and 12 kg ha-1 biofertilizers. The dosage used in a single application was 15 g plant-1 of NPK fertilizer and 300 mL plant-1 of nutrient solution. The base fertilizer consisted of manure in the control treatment and an ameliorant in other treatments at a dose of 4 t ha-1. The results showed that the combination of ameliorant + NPK + 6 kg ha-1 biofertilizer increased PSB population (4.93 x 106 CFU mL-1), available P (15.4 ppm), and P-uptake (0.74 g plant-1). Meanwhile, the combination of ameliorant + nutrient solution + 6 kg ha-1 biofertilizer increased fruit diameter (15 mm), and length of red chili (17.3 cm). Correlation analysis indicated positive correlation between red chili production with stem diameter and fruit length, but a negative correlation with P-uptake. Regression analysis indicated that stem diameter and PSB population had the most dominant effect on red chili yield. Produktivitas dan kualitas cabai merah sangat dipengaruhi oleh kondisi tanah dan ketersediaan unsur hara. Unsur hara memegang peranan penting dalam pertumbuhan dan perkembangan tanaman cabai merah. Percobaan ini bertujuan untuk mengetahui kombinasi amelioran, larutan hara dan biofertilizer terhadap populasi bakteri pelarut fosfat (BPF), P tersedia, serapan P, dan produksi cabai merah pada tanah Inceptisols. Percobaan dilaksanakan di lahan percobaan Fakultas Pertanian Universitas Padjadjaran. Percobaan menggunakan Rancangan Acak Kelompok Lengkap (RAKL) dengan tujuh perlakuan dan empat kali ulangan, terdiri dari: kontrol, NPK dan Larutan Hara dengan dosis 0, 6, dan 12 kg ha-1 pupuk hayati. Dosis yang digunakan dalam satu kali aplikasi adalah pupuk NPK 15 g tanaman-1 dan larutan hara 300 mL tanaman-1. Pupuk dasar berupa pupuk kandang pada perlakuan kontrol dan amelioran pada perlakuan lain dengan dosis 4 t ha-1. Hasil penelitian menunjukkan bahwa kombinasi amelioran + NPK + 6 kg ha-1 pupuk hayati mampu meningkatkan populasi BPF (4,93 x 106 CFU mL-1), P tersedia (15,4 ppm), dan serapan P (0,74 g tanaman-1). Sementara itu, kombinasi amelioran + larutan hara + 6 kg ha-1 pupuk hayati mampu meningkatkan diameter buah (15 mm), dan panjang cabai merah (17,3 cm). Analisis korelasi menunjukkan korelasi positif antara produksi cabai merah dengan diameter batang dan panjang buah, tetapi korelasi negatif dengan serapan P. Analisis regresi menunjukkan bahwa diameter batang dan populasi BPF memiliki pengaruh paling dominan terhadap hasil cabai merah.
Co-Authors Ade Setiawan Adinda Putri Amanda Aditya, Fasa Agus Wahyudin Agus Wahyudin Alifa Salsabila Anindya Alyani Shabrina Anas Ramdhani Anggi Jingga Anggi Jingga Anne Nurbaity ANNE NURBAITY Anni Yuniarti Anny Yuniarti Antonio Yusuf Aristyo Rahardiyan Asmiran, Priyanka Azhari, Yolanda Dewi Azwari, Fachruddin Budiman, Muhammad Nafariz Chotimah, Andina Damayani, Maya Dedi Nursyamsi Dedi Nursyamsi Dedi Nursyamsi Dedi Ruswandi Dedy Nursyamsi Dewi, Yeni Wispa Dirga Sapta Sara Dita, Limbong Agatha Dita Diyan Herdiyantoro DIYAN HERDIYANTORO Dupa, Putri Siska Ekayanti Dwi Suci Rahayu Dzakaria Yogaswara Dzakaria Yogaswara Emma Trinurani Sofyan Fadhilla Oktavianingtyas Trisilvi Fakhrurroja, Hanif Fakhrurroja, Hanif Fakhrurroja Fauziah, Nicky Oktav Fauziah, Nicky Oktav Fauziah Feni Siti Fauziah2 Fidya A Puspafirdausi Fiky Yulianto Wicaksono Fiky Yulianto Wicaksono Fiqriah Hanum Khumairah Fiqriah Hanum Khumairah Fitri Widiantini Ghifari, Raden Faqih Hilmiy Haryo Probo Kusumo Iis Nur Asyiah Khumairah, Fiqriah Hanum Leoni Silvia Maharani, Nadhira Saniya Mahdi Argawan Putra Manurung, Dahlia Florencia Marenda Ishak Sonjaya Sule Maulana, Nurzen Mayang Agustina Meddy Rachmady Mieke Rochimi Setiawati Mohamad Dion Tiara Muhamad Aristiyo Muhamad Aristiyo, Muhamad Muhamad Iqbal Kusma Sudana Muhammad Agi Pratama Muhammad Amir Solihin Muhammad Iqbal Maulana Yusuf Mulya, Agus Surya Mulyadi Mulyadi Muthia Erwina Nabila Nabila Syifa Ariani Nadia Nuraniya Kamaluddin Nadia Nuraniya Kamluddin Nono Carsono Nugraha, Gita Bina Nurfitriana, Nofalia Oviyanti Mulyani Pirda Nurhopipah Pudjawati Suryatmana Pujawati Suryatmana Puspafirdausi, Fidya A. Putri, Envry Artanti Duidahayu Rachelita, Nadia Randy Nugraha Rangga Jiwa Wibawa Reginawanti Hindersah Ria, Elly Roosma Risanti, Rara Rahmatika Rita Harni Robi Natalie Silpanus Ruminta Ruminta Septyani Sofatin Setiawati, Mieke Richimi Simanjuntak, Edo Kelvin Simarmata, Tualar Simarmata Syifa Nabila Kurnia Tien Turmuktini Toto Bustomi Triani Dewi Triyani Dewi Tualar Simarmata Tualar Simarmata Tualar Simarmata Tualar Simarmata Wahyuda Rachman, Wahyuda Wawan Rachman Wong, Mui-Yun Yanti Ningtyas, Dewi Nurma Yenny Muliani yeti kartika Yuhanidz Yuhanidz Yuliati Machfud