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All Journal Jurnal Agronomi Indonesia (Indonesian Journal of Agronomy) Jurnal Pengendalian Hayati Journal of Tropical Soils JTSL (Jurnal Tanah dan Sumberdaya Lahan) Pelita Perkebunan Journal of Degraded and Mining Lands Management AGRIVITA, Journal of Agricultural Science Journal TABARO Agriculture Science Jurnal Teknik Pertanian Lampung (Journal of Agricultural Engineering) Jurnal Agrotek Tropika Seminar Nasional Lahan Suboptimal Studi Kasus Inovasi Ekonomi Jurnal Manajemen Bisnis dan Kewirausahaan Jurnal Pengabdian Mandiri Business Innovation Management and Entrepreneurship Journal Jurnal Riset Multidisiplin Edukasi International Journal of Economics and Management Research
Eko Handayanto
Fakultas Pertanian, Universitas Brawijaya
Agriculture, Biological Sciences & Forestry Humanities Biochemistry, Genetics & Molecular Biology Decision Sciences, Operations Research & Management Economics, Econometrics & Finance Energy Engineering Environmental Science Languange, Linguistic, Communication & Media Social Sciences Other

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Pengaruh Kombinasi Senyawa Humik dan CaCO3 terhadap Alumunium dan Fosfat Typic Paleudult Kentrong Banten Winarso, Sugeng; Handayanto, Eko; Syekhfani, Syekhfani; Sulistyanto, Didik
JOURNAL OF TROPICAL SOILS Vol. 14 No. 2: May 2009
Publisher : UNIVERSITY OF LAMPUNG

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.5400/jts.2009.v14i2.89-95

Abstract

Effect of Humic Compounds and CaCO3 Combination on Aluminium and Phosphate of Typic Paleudult Kentrong Banten (S. Winarso, E. Handayanto, Syekhfani and D. Sulistyanto): Decomposition of organic matter releases humic compounds, that can chelate metals include Al in acidic soils. This chelation of Al is important for decreasing of Al activity and P fixation in acidic soils. This study was aimed to test the effect of humic compounds extracted from rice-straw compost and CaCO3 combination on aluminium activity and phosphate (available P) on an Ultisol (Typic Paleudult) collected from Kentrong Banten.  A laboratory study was conducted by series consentration of CaCO3 (0, 500, 1.000, 2.000, dan 3.000 ppm) in 8 grams of acidic soil. The acidic soil had previously been subjected to continuously addition of humic compounds and none. Then, these mix of soil and CaCO3 were added 40 ml contained 5.000 ppm humic compounds to obtain 1:5 soil:suspension ratio and  control was made by using aquadest. They were shaked for 2 hours every day and pH was measured. At 11st days incubation  Alexch (N KCl) and soluble of P (PB and PC) were measured.  The results  showed that liming or addition of CaCO3 to the acidic soils decreased Alexch (precipitated to be Al(OH)3) linearly with formula y = -0.778x + 6.108; y = Alexch (Cmol kg-1), x = CaCO3 (M); R² = 0,916. Combination addition of humic compounds and CaCO3 was able to increase pH and Alexch up to not detected. The increased of P-soluble or desorption P untill 384% took place at addition of 0.0016 M CaCO3 and 5000 ppm humic compounds. More desorption of P was observed if the acidic soils has previously been subjected to continuously addition of humic compounds, such us the increased of soluble P up to 739% at addition of CaCO3 0.0008 M.
PENINGKATAN EKONOMI KEUARGA DENGAN DAUR ULANG BARANG BEKAS Dewi Nurjannah; Fien Zulfikarijah; Eko Handayanto
JURNAL PENGABDIAN MANDIRI Vol. 4 No. 10 (2025): Oktober 2025
Publisher : Bajang Institute

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.53625/jpm.v4i10.11509

Abstract

The community service activities carried out aim to foster an entrepreneurial spirit among households as an effort to improve the economy of families in the Gading Kasri sub-district. In addition, it also aims to encourage the surrounding community to be aware of maintaining environmental cleanliness and health, as well as the need for proper waste management. The community service methods included counseling, discussions, question and answer sessions, and hands-on practice in processing used items into items with added economic value. The results of this activity, which was attended by 15 representatives of PKK members, are expected to contribute to improving the economy of PKK mothers, to share knowledge, and to encourage the community to develop their resources in a sustainable manner to improve the family economy. This effort to recycle used items, specifically plastic waste, is intended to motivate the community to improve their abilities and skills and to work to bring benefits to themselves and the surrounding community by producing recycled plastic products such as flower vases, plastic flowers, wall decorations, and others.
Study of the Relationship of e-WOM to Purchase Decision and Brand Image as A Mediation Variable Eko Handayanto; Iqbal Ramadhani Fuadiputra
International Journal of Economics and Management Research Vol. 3 No. 3 (2024): December : International Journal of Economics and Management Research
Publisher : Pusat Riset dan Inovasi Nasional

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55606/ijemr.v3i3.436

Abstract

This research aims to examine the influence of Electronic Word of Mouth (e-WOM) on Purchase Decisions, with Brand Image serving as a mediating variable, focusing on Torch Bag products in the Malang region. Utilizing a quantitative research approach, data were collected through structured questionnaires from 150 respondents and analyzed using the Structural Equation Modeling - Partial Least Squares (SEM-PLS) method. The findings reveal that e-WOM significantly affects both Brand Image and Purchase Decisions. Moreover, Brand Image has a strong positive impact on Purchase Decisions and also acts as a partial mediator in the relationship between e-WOM and purchasing behavior. This indicates that positive online reviews and consumer interactions not only build trust and enhance a brand's image but also significantly influence the final purchasing decision. The study contributes to the growing literature on digital consumer behavior and highlights the importance of managing online presence and consumer-generated content. For marketers, the results suggest that investing in strategies to stimulate and manage e-WOM can enhance brand perception and drive sales. Maintaining a consistent and positive brand image through online platforms is crucial in today's competitive digital market landscape.
Isolation of Mercury-Resistant Endophytic and Rhizosphere Microorganisms from Grasses in Abandoned Gold Mining Area Reni Ustiatik; Suharjono; Yulia Nuraini; Eko Handayanto
Jurnal Agronomi Indonesia (Indonesian Journal of Agronomy) Vol. 49 No. 1 (2021): Jurnal Agronomi Indonesia
Publisher : Indonesia Society of Agronomy (PERAGI) and Department of Agronomy and Horticulture, Faculty of Agriculture, IPB University, Bogor, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (595.264 KB) | DOI: 10.24831/jai.v49i1.32356

Abstract

Terdapat sekitar 900 titik pertambangan emas skala kecil (PESK) di Indonesia yang memperoleh emas melalui teknik amalgamasi dan sianidasi. Teknik amalgamasi menyebabkan pencemaran merkuri (Hg) di tanah. Penelitian ini merupakan penelitian pendahuluan (preliminary study) yang bertujuan untuk mengisolasi mikroorganisme endofit dan rhizosfer resisten Hg dari rumput pionir yang tumbuh di tanah yang tercemar Hg. Mikroorganisme paling berpotensi akan diaplikasikan pada fitoremediasi merkuri di penelitian selanjutnya. Sampel rumput pionir diambil dari lahan pertanian bekas kawasan pertambangan emas dengan teknik amalgamasi di Desa Bonjeruk, Kecamatan Jonggat, Kabupaten Lombok Tengah, Nusa Tenggara Barat. Total mikroorganisme dihitung menggunakan Colony Forming Unit (CFU) atau Standard Plate Count. Koloni mikroorganisme dikarakterisasi berdasarkan ciri morfologi. Mikroorganisme endofit dan rizosfer yang resisten Hg berhasil diisolasi dari rumput pionir (Cynodon dactylon dan Eleusine indica) di lokasi penelitian. Koloni mikroorganisme rizosfer sangat beragam secara morfologi dibandingkan dengan mikroorganisme endofit berdasarkan jumlah mikroorganisme terisolasi, berturut-turut 20 isolat dan 17 isolat. Kepadatan mikroorganisme rizosfer lebih tinggi (96%) dibandingkan mikroorganisme endofit (4%). Kepadatan bakteri dan jamur rizosfer masing-masing adalah 47x103 dan 2x103 CFU g-1 sedangkan kepadatan bakteri endofit dan jamur masing-masing hanya 2x103 dan 1x103 CFU g-1.
Co-Authors abdullah Taufiq Abdullah Taufiq Aditya Putri Utami Aditya, Rizal Bayu Ali Rahmat Ali Rahmat Amirul Izzul Haq Amrullah Fiqri Ananda, Nadia Putri Aniek Rumijati Ardik Praharjo Bambang Siswanto Bebi Ratnasari Bonauli Christianoyd Siahaan Cahyaningati, Nilam Chalimatuz Sa'diyah Cynthia Monica Sugiono Dayu kristianto Dewi Nurjannah Dewi Puspita Widiarini Didik SULISTYANTO Didik SULISTYANTO Didik Sulistyanto Didik Suprayogo Dwi Agustiyani Erlisa Karmila Dewi F Fahrunsyah Fatihah Baroroh Fien Zulfikarijah Gema Junyo Gusti Irya Ichriani Hany Handajani Helvi Yanfika Iqbal Ramadhani Fuadiputra Jihadi, Muhammad John Bako Baon Juliati, Ratih Kurniatun Hairiah Lestari, Novi Puji Lia Kurniawati Odar Serang Lia Nova Triadriani Luqman Dzul Hilmi Maulita, Elma Dea Moch. Dawam Maghfoer Muhammad Achiril Haq Naima Haruna Nisma Ula Shoumi Rahmawati Novi Rahmawati Sutopo Nur Diana Nur Laili Nur Laili Prasidya Perwitasari Purwanto . Rahayu Relawati Ramadhani, Winih Sekaringtyas Ratih Juliati Ratny Witanti Arista Retno Wilujeng Retno Wilujeng Ridesti Rindyastuti Riezka Setya Pratiwi Rifdah Aprianti Rony Irawanto Sari, Titis Ragilia Luxyta SATRIYAS ILYAS Sa’diyah, Chalimatuz Siska Nurfitriani Siska Nurfitriani Sonia Tambunan Sri Rahayu Utami Sugeng Winarso Suharjono SYEKHFANI . Syekhfani Syekhfani Syekhfani Syekhfani Sykehfani Sykehfani Tatik Wardiyati Umi Chasanah Ustiatik, Reni Wahyu Ningtyas Wani Hadi Utomo Yulia Nuraini Yulia Nuraini Yulist Rima Fiandari