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All Journal Jurnal Agronomi Indonesia (Indonesian Journal of Agronomy) Journal of Tropical Soils Berkala Ilmiah Pertanian Agrovigor: Jurnal Agroekoteknologi Techno: Jurnal Penelitian Journal of Degraded and Mining Lands Management Jurnal Agro Caraka Tani: Journal of Sustainable Agriculture Martabe : Jurnal Pengabdian Kepada Masyarakat PengabdianMu: Jurnal Ilmiah Pengabdian kepada Masyarakat Menara Perkebunan J-Dinamika: Jurnal Pengabdian Kepada Masyarakat Jurnal Pengabdian Masyarakat IPTEKS Jurnal Bioindustri Journal of Soilscape and Agriculture Warta LPM Jagur: Jurnal Agroteknologi Journal of Bioindustry

Tri Candra Setiawati

Department Of Soil Science, Faculty Of Agriculture, The University Of Jember Jl. Kalimantan 37, Jember-68121

Author-ID : 405152

Religion Agriculture, Biological Sciences & Forestry Arts Humanities Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Civil Engineering, Building, Construction & Architecture Economics, Econometrics & Finance Education Energy Engineering Environmental Science Health Professions Law, Crime, Criminology & Criminal Justice Public Health Social Sciences

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Pemanfaatan Tanaman Refugia sebagai Pestisida Nabati untuk Mengurangi Serangan Hama pada Sistem Budidaya Hidroponik: Utilization of Refugia Plant as a Biopesticide to Reduce Pest Attack on Hydroponic Cultivation Systems Tri Candra Setiawati; Sigit Prastowo
PengabdianMu: Jurnal Ilmiah Pengabdian kepada Masyarakat Vol. 7 No. 6 (2022): PengabdianMu: Jurnal Ilmiah Pengabdian kepada Masyarakat
Publisher : Institute for Research and Community Services Universitas Muhammadiyah Palangkaraya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33084/pengabdianmu.v7i6.3870

Cultivation of plants by utilizing a small area can be developed, especially during a pandemic, among others, by using a hydroponic system. Vegetable yields (pakcoy, lettuce) do not always have good quality due to pest attacks, including in the hydroponic system, resulting in a decrease in both quantity and quality, which affects the income and turnover of this micro-enterprise (UMKM). The objectives of this service are 1) provide knowledge and skills in making biopesticides based on refugia plants or organic pesticides (“pestisida nabati”) in order to improve the quality and quantity of production, and 2) The practice of “pestisida nabati” application for hydroponic cultivation. Service activities are carried out with the following methods: providing material and discussion, making vegetable pesticides/biopesticides, and applying “pestisida nabati” in hydroponic cultivation in Micro Business Groups (UMKM "Ini Hydroponics." Accordingly, 12 participants in the training for making biopesticides and their application were practitioners, partners, and students interested in developing hydroponics. The training on making biopesticides with the essential ingredients of mischievous (Cosmos caudatus) and neem leaves (Azadirachta indica) has resulted in a solution of vegetable pesticides ready to be applied in hydroponic cultivation. The spraying application is carried out on the first day after the biopesticide is made and a week later. Based on observations of the quality of lettuce harvested a week after spraying, the product obtained showed a lower pest attack than before.

The Application of Silica Fertilizer to Increase Resistance of Chili Pepper Plant (Capsicum annuum L.) to Waterlogging Stress Luhur Alif Budinuljanto Zainul; Sigit Soeparjono; Tri Candra Setiawati
Jurnal Agronomi Indonesia (Indonesian Journal of Agronomy) Vol. 50 No. 2 (2022): Jurnal Agronomi Indonesia
Publisher : Indonesia Society of Agronomy (PERAGI) and Department of Agronomy and Horticulture, Faculty of Agriculture, IPB University, Bogor, Indonesia

Tanaman cabai rawit (Capsicum annuum L.) merupakan komoditas hortikultura yang banyak dibudidayakan di lahan sawah, namun sering mengalami cekaman genangan air akibat banjir. Upaya untuk mengatasi kendala tersebut yaitu dengan aplikasi unsur hara silika. Penelitian ini bertujuan untuk mengetahui peran silika dalam meningkatkan toleransi cabai rawit terhadap cekaman genangan. Percobaan dilakukan di rumah kaca milik Universal PT Tempu Rejo, Kabupaten Jember, Jawa Timur mulai bulan Oktober sampai dengan Desember 2021. Penelitian dilaksanakan menggunakan rancangan acak lengkap faktorial (4x4) dengan 3 ulangan. Faktor pertama adalah dosis pupuk silika yaitu D0 = 0 mL, D1 = 0.15 mL, D2 = 0.30 mL, dan D3 = 0.45 mL per tanaman. Faktor kedua adalah cekaman genangan yaitu W1 = 50-70%, W2 = >70-90%, W3 = >90-110%, dan W4 = >110-130% dari kapasitas lapang. Hasil penelitian menunjukkan bahwa interaksi antara perlakuan dosis silika dengan cekaman genangan tidak berpengaruh nyata pada peubah tinggi tanaman, jumlah daun dan luas daun, namun berpengaruh nyata pada peubah kadar air relatif, kandungan H2O2, prolin dan klorofil. Pupuk silika mampu meningkatkan ketahanan tanaman cabai rawit terhadap cekaman genangan ditunjukkan dengan korelasi positif antara silika dengan klorofil dan prolin serta korelasi negatif antara silika dengan kandungan H2O2. Kata kunci: fase vegetatif, hidrogen peroksida, klorofil, prolin

Soil Drenching with Silicon Improves the Adaptive Response of Tobacco Cultivation under Excess Water Condition Almansyah Nur Sinatrya; Sigit Soeparjono; Tri Candra Setiawati
Caraka Tani: Journal of Sustainable Agriculture Vol 37, No 2 (2022): October
Publisher : Universitas Sebelas Maret

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20961/carakatani.v37i2.60756

Tobacco variety H382 was a cigar type tobacco that has a high economic value and potential as export trade commodity in Indonesia. The development stage of tobacco was very sensitive to water stress, like the water excess. Silicon was one of the most abundant elements in earth crust and has a role in water stress reduction to the plant. The objective of this study was to determine the response of tobacco crop variety H382 with the application of silicon fertilizer to adapt in waterlogging stress condition. This study used a factorial randomized block design with first factor was silicon fertilizer (0, 0.15, 0.30 and 0.45 ml) and second factor was excess water stress treatments (50% to 70%, 70% to 90%, 90% to 110% and 110% to 130% of field capacity). All treatments were replicated three times. The results showed that the addition of 0.45 ml silicon fertilizer to waterlogged tobacco crop could escalate the adaptive response of plant to cope with stress; seen from the increasing of the opened stomata, aerenchyma formation and the chlorophyll content of tobacco crop under excess water stress compared to control. Silicon supplementation improves the water availability in root surroundings and repairs the root architecture; thus, lead to a better hydraulic conductivity of the root for water and nutrient intake. Furthermore, authors found that the application of silicon fertilizer helped tobacco crop variety H382 improve plant adaptability to deal with excess water stress.

Peningkatan Pengetahuan Petani melalui Pelatihan Pembuatan Pupuk Organik Cair di Desa Karangrejo, Gumukmas, Kabupaten Jember. Sugeng Winarso; Rendy Anggriawan; Laily Mutmainnah; Tri Candra Setiawati
Warta LPM WARTA LPM, Vol. 26, No. 1, Januari 2023
Publisher : Universitas Muhammadiyah Surakarta

The use of agrochemicals is still an option in terms of providing fast nutrition and increasing plant growth more efficiently to a certain extent. However, its continuous use results in a decrease in soil quality and soil fertility, which in turn causes the accumulation of heavy metal ions in plant tissues, and affects nutritional yields and food safety. The community service activities were carried out by the SBF (Soil Biodiversity and Fertility) team of the Jember University Soil Science study program in Karangrejo Village, Gumukmas District, Jember Regency. Field visits were conducted on farmers' fields to review, evaluate and discuss qualitative characteristics of soil properties. This service activity aims to increase understanding of sustainable soil fertility management and training in making liquid organic fertilizer based on a local bacterial consortium. The results of the activity showed that farmers' knowledge of the parameters of soil properties, especially pH, nutrients, and soil organic matter, was still minimal. The level of acidity (pH) of the soil determines the factors of production through the ease with which nutrients are absorbed by plants as well as the possibility of the presence of toxic elements that can interfere with plant growth. Knowledge of soil pH is needed in relation to nutrient management and liming. A deeper understanding of several parameters of soil properties, especially soil pH values, needs to be emphasized and followed up through mentoring activities. Mentoring activities as follow-up activities for farmer groups are carried out with the target output of liquid organic fertilizer products. Entrepreneurship training for farmer groups members also needs to be carried out to build an entrepreneurial spirit and added value from livestock products by farmers so that the farmer's household economy can sustainable.

Peningkatan Ketersediaan dan Serapan P pada Tanaman Jagung Di Lahan Tercemar Limbah Padat Kapur (Lime Mud) Melalui Penambahan Bahan Organik Tiara Rizky Oceananda Suharto; Tri Candra Setiawati; Sugeng Winarso
JURNAL AGROTEKNOLOGI UNIVERSITAS ANDALAS Vol 2 No 2 (2018)
Publisher : Program Studi Agroteknologi Fakultas Pertanian Universitas Andalas

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25077/jagur.2.2.17-26.2018

The soil contaminated by lime mud has a high content of Ca and Na. It affects the availability of nutrients within the soil. Calcareous soil conditions tend to disperse, sensitive to washing and erosion. Meanwhile, the availability of P nutrients is also low due to the binding of P by Ca in the form of (Ca3PO4)2 that leads the soil productivity to be low. Organic material is a soil enhancer which has complete function, easily available, abundant and can increase P nutrients especially for the plants in the long-term. Hence, the objective of this research was to observe the response of increasing level of soil P contaminated by lime mud and P uptake in maize plant tissues toward the treatment of adding organic material. The research design used in this study was factorial randomized block design comprising of two factors and three replications. The first factor was the source of fertilizer (1) no fertilizer (P0), (2) animal waste bokashi (P1), (3) straw bokashi (P2), (4) guano organic (P3), and (5) NPK inorganic (P4). The second factor was (1) polluted soil (T1) and (2) unpolluted soil (T2). The results revealed that combination of fertilizer types and planting media could significantly increase soil Ca and wet weight of maize crops, additionally gave impact indirectly toward soil pH, P and C-Organic content in the soil, P uptake, plant height, root volume, and dry weight of maize crops. By doing a treatment of giving animal waste bokashi fertilizer combined with contaminated soil media, it apparently produced better results than controlling, and resulted better product than treating them with straw bokashi fertilizer and guano organic fertilizer.

Penyusunan Dokumen Mutu Laboratorium Guna Peningkatan Kualitas Pengelolaan Laboratorium di Sekolah Menengah Kejuruan Negeri (SMKN): Preparation of Quality Laboratory Documents to Improve the Quality of Laboratory Management in State Vocational Schools (SMKN) Tri Candra Setiawati; Wachju Subchan; Sigit Prastowo; Basuki Basuki
PengabdianMu: Jurnal Ilmiah Pengabdian kepada Masyarakat Vol. 8 No. 3 (2023): PengabdianMu: Jurnal Ilmiah Pengabdian kepada Masyarakat
Publisher : Institute for Research and Community Services Universitas Muhammadiyah Palangkaraya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33084/pengabdianmu.v8i3.4720

Vocational High Schools (SMK) in the learning process are supported by laboratories or workshops that provide competence to students. The existence of the Teaching Factory program as a result of cooperation between SMKN and industry is one factor that requires the school to prepare quality documents, competent laboratory managers, and skilled students. Therefore, well-organized Laboratory Management will benefit schools, students, laboratory users, and stakeholders. This activity aims to provide understanding and assistance in compiling laboratory quality documents that adopt the SNI ISO 17025:2017 quality management system. This system regulates testing laboratories and calibration laboratories, but it is very appropriate if adopted in several cases to be applied to educational laboratories, especially the preparation of laboratory quality documents. Community Service activities were conducted at SMKN 4 in Bondowoso Regency and SMKN 8 in Jember Regency. Based on the discussion and questionnaire results, the activity showed that at both SMKNs, the understanding of the laboratory quality management system increased (72.7%) for both students and managers (teachers and technicians/labor). Quality documents for levels 2, 3, and 4 at both SMKNs have been compiled. The number of Standard Operational Procedure (SOP) documents at SMKN 4 is 8 SOPs; at SMKN 8, as many as 31 SOPs are based on SNI ISO 17025:2017 laboratory QMS.

PELATIHAN BUDIDAYA MAGGOT (HERMETIA ILLUCENS) SEBAGAI PEREDUKSI SAMPAH ORGANIK DAPUR DI BANK SAMPAH DESA TEMPUREJO KABUPATEN JEMBER Millatuz Zahroh; Moh. Hasan; Tri Candra Setiawati
Martabe : Jurnal Pengabdian Kepada Masyarakat Vol 6, No 11 (2023): Martabe : Jurnal Pengabdian Kepada Masyarakat
Publisher : Universitas Muhammadiyah Tapanuli Selatan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31604/jpm.v6i11.4212-4223

Bank Sampah Unit Desa Tempurejo didirikan untuk mengatasi permasalahan sampah di Desa Tempurejo-Jember. Dalam mengelola sampah anorganik, bank menerima tabungan sampah dari warga kemudian dikirim ke tempat pengepul. Namun demikian, sampah organik terutama sampah organik dapur (SOD) masih belum terkelola. Jika SOD terus menumpuk, maka dapat menimbulkan bau yang tidak sedap dan juga menghasilkan gas metana yang dapat menimbulkan kerusakan lingkungan. Solusi yang dapat digagaskan untuk mendegradasi SOD dengan cepat dan efektif yaitu melalui budidaya maggot (Hermetia Illucens). Selain dapat mengurai SOD, maggot memiliki banyak kelebihan lain diantaranya tidak menularkan penyakit pada manusia, mudah dibudidayakan dan bernilai ekonomis, yaitu sebagai alternatif pakan ternak bernutrisi tinggi. Tujuan pelaksanaan program pengabdian ini adalah untuk memberikan pelatihan budidaya maggot (Hermetia Illucens) sebagai pereduksi sampah organik dapur di Bank Sampah Desa Tempurejo Kabupaten Jember. Tahapan dalam melaksanakan kegiatan ini adalah persiapan, studi tiru, pengadaan alat dan bahan, pelatihan dan sosialisasi hingga dilakukan monitoring, pendampingan serta evaluasi. Kegiatan ini telah dilaksanakan pada bulan Juli hingga November 2022.

Aplikasi bakteri pemacu tumbuh dan ameliorant terhadap ketersediaan hara P dan K di tanah masam serta serapannya pada tanaman padi (Oryza sativa L.) Tri Candra Setiawati; Salsabila Alifia Widinda; Wiwik Hartatik
Jurnal AGRO Vol 10, No 1 (2023)
Publisher : Jurusan Agroteknologi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15575/22633

Acidic soils are marginal soils with low pH, dominated by Al and Fe ions which can bind essential nutrients such as P. Dissolving P and K from sources in the soil can be accelerated by microbial activity and ameliorant materials, also to improve nutrient availability and other soil properties. This study aimed to determine the effect of inoculation growth promoting bacteria and ameliorants to improve the chemical properties of acid soils and rice nutrient uptake of P and K. The research was conducted in greenhouse of Agriculture Faculty, Universitas Jember, from November 2021 – April 2022. It used a completely randomized design with two factors and three replications: ameliorant materials namely organic matter (A1), gypsum (A2), dolomite (A3), and NPK fertilizer (A4). The second factor was the inoculation of growth-promoting bacteria, namely without inoculation of bacteria (P0), phosphate solubilizing bacteria (PSB) (P1), potassium solubilizing bacteria (KSB) (P2), and a combination of PSB and KSB (P3). The bacterial species used were Bacillus valezensis and Bacillus sp.. The rice variety used was the local Pendok rice variety. The results showed no interaction between the application of growth-promoting bacteria and ameliorant. Ameliorant factor affected the increase in soil pH, the P concentration, and the uptake on the shoot of rice plants. The treatment of organic matter ameliorant and gypsum increased the phosphorus content of the plant canopy tissue by 0.420% to 0.426%. The P uptake of the rice plant shoot was increased by up to 27.59% with the addition of gypsum compared to the addition of NPK fertilizer.ABSTRAKTanah masam merupakan tanah marjinal dengan pH yang rendah, didominasi ion Al dan Fe yang dapat mengikat unsur hara esensial seperti P. Penelitian ini bertujuan untuk mengetahui pengaruh pemberian bakteri pemacu tumbuh dan amelioran terhadap perbaikan sifat kimia tanah masam dan serapan hara P dan K tanaman padi. Pelaksanaan penelitian di rumah kaca Fakultas Pertanian Universitas Jember pada November 2021 – April 2022 menggunakan Rancangan Acak Lengkap 2 faktor dan diulang tiga kali, faktor pertama Amelioran (A): bahan organik (A1), gypsum (A2), dolomit (A3), dan pupuk NPK (A4). Faktor kedua yaitu : (1) tanpa inokulasi bakteri (P0), (2) bakteri pelarut fosfat (BPF) (P1), (3) bakteri pelarut kalium (BPK) (P2), dan (4) kombinasi BPF dan BPK (P3). Spesies bakteri yang digunakan adalah Bacillus valezensis dan Bacillus sp.. Varietas padi yang digunakan adalah varietas padi lokal Pendok. Hasil penelitian menunjukkan tidak terdapat interaksi antara aplikasi bakteri pemacu tumbuh dan amelioran. Amelioran berpengaruh terhadap pH tanah, serta peningkatan kadar dan serapan hara fosfor pada jaringan tajuk tanaman padi. Perlakuan amelioran bahan organik dan gypsum meningkatkan kadar fosfor jaringan tanaman bagian tajuk sebesar 0,420% hingga 0,426%. Serapan hara P bagian tajuk meningkat hingga 27,59% pada penambahan amelioran gypsum dibanding penambahan pupuk NPK. Aplikasi bahan amelioran memberikan perubahan yang lebih nyata dibanding perlakuan inokulasi bakteri pemacu tumbuh.

APLIKASI BAKTERI PELARUT FOSFAT DAN ROCK PHOSPHATE TERHADAP KARAKTERISTIK FISIOLOGI TANAMAN TOMAT (Solanum lycopersicum L.) Sherly Meirdania Lestari; R. Soedradjad; Sigit Soeparjono; Tri Candra Setiawati
JURNAL BIOINDUSTRI (JOURNAL OF BIOINDUSTRY) Jurnal Bioindustri: VOL. 2 NO. 1 (2019)
Publisher : Universitas Trilogi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31326/jbio.v2i1.178

Phosphorus (P) is one of the essential nutrients that functions is metabolism in plant. Based on these functions, it indicates that nutrient P has an important role for plant growth and production. However, its availability in soil is very low, which is less than 0.01% of the total P. Therefore, the availability of P nutrients in the soil needs to be increased by increasing the activity of soil microorganisms through the use of phosphate solubilization bacteria. This research is aimed to show the changes in the physiological characteristics of tomato plants through the application of phosphate solubilization bacteria and rock phosphate. Experiment using factorial randomized block design (RBD) which consisted of 2 factors with 2 consultation levels on the first factor (phosphate solubilization bacteria) and 4 levels on the second factor (rock phosphate), and it consist of 8 combinationed of phosphate solubilization bacteria and rock phosphate with 3 replicated. The results showed that the combination treatment of phosphate solubilization bacteria and rock phosphate affected the physiological characteristics of tomato plants, especially on the variables of stomata density, leaf chlorophyll, plant height, plant dry weight, fruit weight and plant P-tissue content in the vegetative final phase. The recommendation of an efficient fertilizer combination to improve physiological characteristics and high yields is use the phosphate solubilization bacteria and rock phosphate 0.69 grams Keywords: phosphate solubilization bacteria, physiological characteristic, rock phosphate

Pelarutan P dan K dari batuan leusit dan apatit menggunakan kombinasi senyawa humat-BPF-BPK Mohammad Jimmy KURNIATA; Tri Candra SETIAWATI; Jay JAYUS
Menara Perkebunan Vol. 87 No. 2 (2019): 87 (2), 2019
Publisher : INDONESIAN OIL PALM RESEARCH INSTITUTE

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22302/iribb.jur.mp.v87i2.330

AbstractDue to the limited availability of potassium and phosphate in soil and the high price of their synthetic mineral fertilizers, the importance of minerals-solubilizing microorganismshas been increasingly significant aimed at sustainable agriculture achievement. Apatite and leucite are considerably abundant minerals; however, their solubility is low. This study was aimed to study the effects of the combination of phosphate-and potassium-solubilizing bacteria (PhSB and PSB) and humic acid of cassava as bioleaching agents in the solubilization process of potassium and phosphate from agromineral material. Some leucite agromineral materials were obtained from Situbondo and Pati, while apatite materials were obtained from Tuban and Ciamis, Indonesia. The minerals were treated with 2.10 x 107CFU/g PhSB and 1.61 x 107CFU/g PSB isolates, combined with 100 ppm organic C humic compounds from cassava as the media. The minerals solubility was monitored every two weeks for 12 weeks ofobservation, which includes the concentration of dissolved K and P, as well as the pH of the media. The presence of organic acids was observed to monitor the bacterial activity by using HPLC, while the physical changes of the rock surface due to bacterial dissolution were scanned by using scanning electron microscopy (SEM). The results showed that the highest dissolution of P was recorded at week 4 (344.23 ppm) released from Tuban apatite with the combination of PhSB and PSB under the humic compound.In contrast, the highest K dissolution was obtained at week 6 for Situbondo leucite (44.21 me/100 g) with a combination of humic cassava compound and PSB only. Statistical analyses showed a mark different on both minerals for dissolution of K and P. The SEM result indicates breakage of the rock surface after a three month observation period indicating that the dissolution minerals occurred. Selected organic acids such as citric, ferulic, coumaric, syringic, and malic acids were detected during the treatment.[Keywords: leucite, apatite, humic compounds, organic acid] Abstrak Ketersediaan kalium (K) dan fosfat (P) dalam tanah terbatas,danharga pupuk sintetik relatif mahal, menjadikan mikroorganismepelarut mineral memegang peranan penting dalam menunjang pertanian berkelanjutan.Batuan mineral apatit dan leusitmerupakan sumber daya mineral dengan ketersediaan tinggi tetapi mempunyai kelarutan mineral rendah. Penelitian bertujuan untukmempelajari pengaruh kombinasi bakteri pelarut fosfat (BPF), bakteri pelarut kalium (BPK), dan humatsingkong sebagai agen bioleachingdalam proses pelarutan K dan P dari bahan agromineral. Bahan agromineral leusitdiperoleh dariKabupatenSitubondo dan Pati, sedangkan bahan apatit berasal dari Kabupaten Tuban dan Ciamis, Indonesia. Bahan mineral diperlakukan dengan 2,10 x107CFU/gBPF dan 1,61 x 107CFU/gBPK, dikombinasikan dengan 100 ppm C organik senyawa humatdari singkong sebagai media. Kelarutan mineral diamati setiap dua minggu sekali selama 12 minggu meliputi kelarutan K dan P, dan pH media. Produksi asam organik dianalisis untuk mengamati aktivitas bakteri menggunakan HPLC dan perubahan fisik permukaan batuan akibat pelarutan bakteri dipindai menggunakan SEM.Hasil penelitian menunjukkan bahwa pelarutan fosfat tertinggi tercatat pada minggu ke 4 (344,23 ppm) yang dilepaskan dari apatit Tuban dengan kombinasi BPF dan BPK dengan senyawa humat, sedangkan pelarutan kalium tertinggi diperoleh pada minggu ke 6 dari leusitSitubondo (44,21 me / 100 g) dengan kombinasi senyawa humatsingkong dan BPK. Secara statistikpada kedua mineral pelarutan K dan P menunjukkan berbedanyata. Hasil analisis dengan menggunakan SEMterjadi kerusakan permukaan batuansetelah periode pengamatan tigabulan yang menunjukkan bahwa terjadi pelarutan mineral. Selama percobaan dideteksi beberapa asam organik seperti asam sitrat, ferulat, kumarat, siringatdan malat. [Kata kunci: leusit, apatit,senyawa humat,asam organik]

Co-Authors Aisyah Valentini Sonia Almansyah Nur Sinatrya Arie Mudjiharjati Bambang Hermiyanto Bambang Hermiyanto Basuki, Basuki Farida Wahyu Ningtyias, Farida Wahyu I Gusti Bagus Wiksuana I Indasah Indah Nurul Safitri Jayus Jayus Kartika Sholehatin Laily Mutmainnah Luhur Alif Budinuljanto Zainul Marinus H Pandutama Millatuz Zahroh, Millatuz Moh. Hasan Mohammad Jimmy KURNIATA NIKEN SULISTYANINGSIH Raden Soedradjad Rendy Anggriawan Salsabila Alifia Widinda Sari, Retno Purnama Sari Sherly Meirdania Lestari Sigit PRASTOWO Sigit Soeparjono Sugeng Winarso Sugeng Winarso Sukron Romadhona Taufik Kurrohman Tiara Rizky Oceananda Suharto Wachju Subchan Wachju Subchan Wiwik Hartatik

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