15 results on '"Purnomo, Dedi"'
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2. Efektivitas Pendistribusian Zakat Oleh Badan Amil Zakat Nasional Kabupaten Siak
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Kartius, Herman, Herman, and Purnomo, Dedi
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Materials Chemistry ,Effectiveness ,Baznas ,Distribution - Abstract
The National Amil Zakat Agency (Baznas) of Siak Regency is a zakat management agency in the Siak Regency area which is responsible for reports to the Regent. The purpose of this study was to analyze and explain the effectiveness of the distribution of Zakat by the National Amil Zakat Agency of Siak Regency (Koto Gasib District Study). The type of research used is descriptive research with qualitative methods by analyzing data in the form of interviews and observations. The study was conducted in Koto Gaasib District, Siak Regency by assessing the effectiveness of the distribution of zakat carried out by Baznas, Siak Regency, to Mustahik in Koto Gasib District. The sample in this study consisted of the Head of Baznas, Deputy II for Distribution and Utilization, staff, UPZ Koto Gasib and Mustahik. The results of the research conducted have not been fully effective because there are still several obstacles found, including the socialization carried out by Baznas has not been maximized because the purpose of socialization is focused on muzakki. In addition, reporting from mustahik regarding its business development is also not clear. The suggestions that will be recommended are that the socialization must be balanced to both muzakki and mustahik, as well as the reporting provided by mustahik about business development to the Baznas of Siak Regency.
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- 2023
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3. Maintaining understory vegetation in oil palm plantations supports higher assassin bug numbers.
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Stone, Jake, Advento, Andreas Dwi, Pashkevich, Michael D., Aryawan, Anak Agung Ketut, Caliman, Jean‐Pierre, Hood, Amelia S. C., Foster, William A., Naim, Mohammad, Pujianto, Purnomo, Dedi, Suhardi, Tarigan, Ribka Sionita, Rambe, Tuani Dzulfikar Siguga, Widodo, Rudy Harto, Luke, Sarah H., Snaddon, Jake L., and Turner, Edgar C.
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- 2023
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4. Oil Palm Yield Over is Negatively Associated with Increased Rainfall Up to Six Months Before Harvest, and Highly Influenced by Site-Level Variation
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Popkin, Megan, primary, Advento, Andreas Dwi, additional, Aryawan, Anak Agung Ketut, additional, Caliman, Jean-Pierre, additional, Naim, Mohammad, additional, Foster, William A., additional, pujianto_smartri@yahoo.com, Pujianto, additional, Purnomo, Dedi, additional, Snaddon, Jake L., additional, suhardi.smartri@gmail.com, Suhardi, additional, Tarigan, Ribka Sionita, additional, Rambe, Tuani Dzulfikar Siguga, additional, Widodo, Rudy Harto, additional, Luke, Sarah, additional, and Turner, Edgar C., additional
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- 2023
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5. Analysis of Student Motivation in Online Learning for the Tourism and Hospitality Management Information System Course during the Covid-19 Pandemic
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Purnomo, Dedi Joko, primary, Lewa, Andi Hallang, additional, and Asshofi, Izza Ulumuddin Ahmad, additional
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- 2021
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6. Habitat heterogeneity supports day-flying Lepidoptera in oil palm plantations.
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Reiss-Woolever, Valentine Joy, Dwi Advento, Andreas, Aryawan, Anak Agung Ketut, Caliman, Jean-Pierre, Foster, William A., Naim, Mohammad, Pujianto, Purnomo, Dedi, Snaddon, Jake L., Soeprapto, Suhardi, Tarigan, Ribka Sionita, Wahyuningsih, Resti, Siguga Rambe, Tuani Dzulfikar, Ps, Sudharto, Widodo, Rudy Harto, Luke, Sarah H., and Turner, Edgar C.
- Abstract
Oil palm is one of Southeast Asia's most common crops, and its expansion has caused substantial modification of natural habitats and put increasing pressure on biodiversity. Rising global demand for vegetable oil, coupled with oil palm's high yield per unit area and the versatility of the palm oil product, has driven the expansion of oil palm agriculture in the region. Therefore, it is critical to identify management practices that can support biodiversity in plantations without exacerbating negative impacts on the environment. This study focuses on day-flying Lepidoptera (butterflies and moths), which contribute to the ecosystem functioning as pollinators, prey, and herbivore species. We assessed whether density and behaviours of day-flying Lepidoptera varied between different habitats within oil palm plantations and across seasons. We surveyed the density and behaviours of Lepidoptera communities in mature industrial oil palm plantations within the Biodiversity and Ecosystem Function in Tropical Agriculture (BEFTA) Programme sites, in Riau, Indonesia. We surveyed two distinct habitats within the plantations in March and September 2013: Edge habitats, which were bordered by plantation roads on one side, and Core habitats in the centre of oil palm planting blocks. We conducted analyses on the effect of habitat type and season on both the overall density and behaviour of Lepidoptera communities and, independently, on the most common species. In our surveys, we observed 1464 individuals across 41 species, with a significantly higher density in Edge than in Core habitats. While there was no significant difference between overall density in March and September surveys, there was an interaction between season and habitat, with density increasing more markedly in Edge than Core areas in September. There was also a significant effect of habitat and season on behavioural time budget for the community as a whole, with more active behaviours, such as foraging and mating, being recorded more frequently in Edge than Core habitats, and more commonly in September than March. The effect of habitat type, season, and their interaction differed between the six most common species. Our findings indicate that Lepidoptera abundance is affected by habitat characteristics in a plantation and can therefore be influenced by plantation management practices. In particular, our study highlights the value of road edges and paths in plantations for day-flying Lepidoptera. We suggest that increased non-crop vegetation in these areas, achieved through reduced clearing practices or planting of flowering plants, could foster abundant and active butterfly communities in plantations. These practices could form part of sustainability management recommendations for oil palm, such as those of the Roundtable on Sustainable Palm Oil. [ABSTRACT FROM AUTHOR]
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- 2023
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7. Managing oil palm plantations more sustainably: large-scale experiments within the biodiversity and ecosystem function in tropical agriculture (BEFTA) programme
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Luke, Sarah H., Advento, Andreas Dwi, Agung Ketut Aryawan, Anak, Nugroho Adhy, Dwi, Ashton-Butt, Adham, Barclay, Holly, Prajna Dewi, Jassica, Drewer, Julia, Dumbrell, Alex J., Eycott, Amy E., Harianja, Martina F., Hinsch, Julie K., Hood, Amelia S. C., Kurniawan, Candra, Kurz, David J., Mann, Darren J., Matthews Nicholass, Kirsty J., Naim, Mohammad, Pashkevich, Michael D., Prescott, Graham W., Ps, Sudharto, Purnomo, Dedi, Purwoko, Rizky Rajabillah, Putra, Syafrisar, Rambe, T. Dzulfikar S., Spear, Dakota M., Tan, David J. X., Tao, Hsiao-Hang, Tarigan, Ribka Sionita, Wahyuningsih, Resti, Waters, Helen S., Harto Widodo, Rudi, Woodham, Christopher R., Caliman, Jean-Pierre, Slade, Eleanor M., Snaddon, Jake L., Foster, William A., and Turner, Edgar C.
- Abstract
Conversion of tropical forest to agriculture results in reduced habitat heterogeneity, and associated declines in biodiversity and ecosystem functions. Management strategies to increase biodiversity in agricultural landscapes have therefore often focused on increasing habitat complexity; however, the large-scale, long-term ecological experiments that are needed to test the effects of these strategies are rare in tropical systems. Oil palm (Elaeis guineensis Jacq.)—one of the most widespread and important tropical crops—offers substantial potential for developing wildlife-friendly management strategies because of its long rotation cycles and tree-like structure. Although there is awareness of the need to increase sustainability, practical options for how best to manage oil palm plantations, for benefits to both the environment and crop productivity, have received little research attention. In this paper we introduce the Biodiversity and Ecosystem Function in Tropical Agriculture (BEFTA) Programme: a long-term research collaboration between academia and industry in Sumatra, Indonesia. The BEFTA Programme aims to better understand the oil palm agroecosystem and test sustainability strategies. We hypothesise that adjustments to oil palm management could increase structural complexity, stabilise microclimate, and reduce reliance on chemical inputs, thereby helping to improve levels of biodiversity and ecosystem functions. The Programme has established four major components: (1) assessing variability within the plantation under business-as-usual conditions; (2) the BEFTA Understory Vegetation Project, which tests the effects of varying herbicide regimes; (3) the Riparian Ecosystem Restoration in Tropical Agriculture (RERTA) Project, which tests strategies for restoring riparian habitat; and (4) support for additional collaborative projects within the Programme landscape. Across all projects, we are measuring environmental conditions, biodiversity, and ecosystem functions. We also measure oil palm yield and production costs, in order to assess whether suggested sustainability strategies are feasible from an agronomic perspective. Early results show that oil palm plantation habitat is more variable than might be expected from a monoculture crop, and that everyday vegetation management decisions have significant impacts on habitat structure. The BEFTA Programme highlights the value of large-scale collaborative projects for understanding tropical agricultural systems, and offers a highly valuable experimental set-up for improving our understanding of practices to manage oil palm more sustainably.
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- 2020
8. Complexity within an oil palm monoculture:The effects of habitat variability and rainfall on adult dragonfly (Odonata) communities
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Luke, Sarah H., Dwi Advento, Andreas, Dow, Rory A., Aryawan, Anak Agung Ketut, Barclay, Holly, Eycott, Amy E., Hinsch, Julie K., Kurniawan, Candra, Naim, Mohammad, Pujianto, Purnomo, Dedi, Rambe, Tuani Dzulfikar Siguga, Slade, Eleanor M., Soeprapto, Ps, Sudharto, Suhardi, Tarigan, Ribka Sionita, Wahyuningsih, Resti, Widodo, Rudy Harto, Caliman, Jean-Pierre, Snaddon, Jake L., Foster, William A., Turner, Edgar C., Luke, Sarah H., Dwi Advento, Andreas, Dow, Rory A., Aryawan, Anak Agung Ketut, Barclay, Holly, Eycott, Amy E., Hinsch, Julie K., Kurniawan, Candra, Naim, Mohammad, Pujianto, Purnomo, Dedi, Rambe, Tuani Dzulfikar Siguga, Slade, Eleanor M., Soeprapto, Ps, Sudharto, Suhardi, Tarigan, Ribka Sionita, Wahyuningsih, Resti, Widodo, Rudy Harto, Caliman, Jean-Pierre, Snaddon, Jake L., Foster, William A., and Turner, Edgar C.
- Abstract
Recent expansion of oil palm agriculture has resulted in loss of forest habitat and forest-dependent species. However, large numbers of species—particularly insects—can persist within plantations. This study focuses on Odonata (dragonflies and damselflies): a charismatic indicator taxon and a potentially valuable pest control agent. We surveyed adult Odonata populations biannually over three years within an industrial oil palm plantation in Sumatra, Indonesia. We assessed the effects of rainfall (including an El Niño Southern Oscillation-associated drought), the role of roadside ditches, and the importance of understory vegetation on Odonata populations. To assess the impacts of vegetation, we took advantage of a long-term vegetation management experiment that is part of the Biodiversity and Ecosystem Function in Tropical Agriculture (BEFTA) Programme. We found 41 Odonata species, and communities varied between plantation core and roadside edge microhabitats, and between seasons. Abundance was significantly related to rainfall levels four months before surveys, probably indicating the importance of high water levels in roadside ditches for successful larval development. We found no significant effect of the BEFTA understory vegetation treatments on Odonata abundance, and only limited effects on community composition, suggesting that local understory vegetation structure plays a relatively unimportant role in determining communities. Our findings highlight that there are large numbers of Odonata species present within oil palm plantations and suggest that their abundance could potentially be increased by maintaining or establishing waterbodies. As Odonata are predators, this could bring pest control benefits, in addition to enhancing biodiversity within intensive agricultural landscapes. Abstract in Indonesian is available with online material.
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- 2020
9. Managing Oil Palm Plantations More Sustainably:Large-Scale Experiments Within the Biodiversity and Ecosystem Function in Tropical Agriculture (BEFTA) Programme
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Luke, Sarah H., Advento, Andreas Dwi, Aryawan, Anak Agung Ketut, Adhy, Dwi Nugroho, Ashton-Butt, Adham, Barclay, Holly, Dewi, Jassica Prajna, Drewer, Julia, Dumbrell, Alex J., Edi, Eycott, Amy E., Harianja, Martina F., Hinsch, Julie K., Hood, Amelia S. C., Kurniawan, Candra, Kurz, David J., Mann, Darren J., Nicholass, Kirsty J. Matthews, Naim, Mohammad, Pashkevich, Michael D., Prescott, Graham W., Ps, Sudharto, Pujianto, Purnomo, Dedi, Purwoko, Rizky Rajabillah, Putra, Syafrisar, Rambe, T. Dzulfikar S., Soeprapto, Spear, Dakota M., Suhardi, Tan, David J. X., Tao, Hsiao-Hang, Tarigan, Ribka Sionita, Wahyuningsih, Resti, Waters, Helen S., Widodo, Rudi Harto, Whendy, Woodham, Christopher R., Caliman, Jean-Pierre, Slade, Eleanor M., Snaddon, Jake L., Foster, William A., Turner, Edgar C., Luke, Sarah H., Advento, Andreas Dwi, Aryawan, Anak Agung Ketut, Adhy, Dwi Nugroho, Ashton-Butt, Adham, Barclay, Holly, Dewi, Jassica Prajna, Drewer, Julia, Dumbrell, Alex J., Edi, Eycott, Amy E., Harianja, Martina F., Hinsch, Julie K., Hood, Amelia S. C., Kurniawan, Candra, Kurz, David J., Mann, Darren J., Nicholass, Kirsty J. Matthews, Naim, Mohammad, Pashkevich, Michael D., Prescott, Graham W., Ps, Sudharto, Pujianto, Purnomo, Dedi, Purwoko, Rizky Rajabillah, Putra, Syafrisar, Rambe, T. Dzulfikar S., Soeprapto, Spear, Dakota M., Suhardi, Tan, David J. X., Tao, Hsiao-Hang, Tarigan, Ribka Sionita, Wahyuningsih, Resti, Waters, Helen S., Widodo, Rudi Harto, Whendy, Woodham, Christopher R., Caliman, Jean-Pierre, Slade, Eleanor M., Snaddon, Jake L., Foster, William A., and Turner, Edgar C.
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- 2020
10. Habitat Heterogeneity Helps Support Day-Flying Lepidoptera Biodiversity in Oil Palm Plantations
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Reiss-Woolever, Valentine Joy, primary, Advento, Andreas Dwi, additional, Aryawan, Anak Agung Ketut, additional, Caliman, Jean-Pierre, additional, Foster, William A., additional, Naim, Mohammad, additional, Purnomo, Dedi, additional, Snaddon, Jake L., additional, Tarigan, Ribka Sionita, additional, Wahyuningsih, Resti, additional, Rambe, Tuani Dzulfikar Siguga, additional, Ps, Sudharto, additional, Widodo, Rudy Harto, additional, Luke, Sarah H., additional, and Turner, Edgar C., additional
- Published
- 2021
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11. Respon Pertumbuhan dan Hasil Tanaman Kentang (Solanum tuberosum L.) Terhadap Pemberian Naungan dan Pupuk Kieserite di Dataran Medium
- Author
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Purnomo, Dedi, Damanhuri, FNU, and Winarno, Wahyu
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Solanum tuberosum L ,Respon pertumbuhan ,Dataran medium ,Midland altitute ,Growth response - Abstract
Development of potato cultivation need to be done in order to meet the need of national demand, one of its effort is cultivating potato in medium altitute land, that is 300 to700 m asl. This research was aimed to develop cultivation technology of potato in medium altitude land through applying treatment of kieserite fertilizer (Magnesium fertilizer) and the shading. the research was conducted in August to December 2016. This study used a randomized design group (RDG) factorial composes of two factors. The first factor was using kieserite fertilizer that consisted of five levels, those were 0 kg/ha, 50 kg/ha, 100 kg/ha, 150 kg/ha, and 200 kg/ha. The second factor was shading by using 60% density and no shading. Data was analyzed using Anova (Analyzed of Variance).The results of the analysis suggests that the use of shade with 60% density gave a significant effect on plant height of 14 DAP (Day After Planting), 28 DAP, and 42 DAP, leaf area 42 DAP, and gave a significant effect in number of tuber and no real effect in number of branch. Treatment of kieserite fertilizer (Mg) gave a real effect in the number of branch of plant of 42 DAP, but there was no effect in plant height aged 14 DAP, 28 DAP, and 42 DAP, leaf area 42 DAP, the number of tuber, the weight of tuber. Interaction between shading and kieserite fertilizer (Mg) showed real significant in plant height, leaf area, number of branch, number of tuber, and tuber weight, however the application of the dose and an intensity of kieserite fertilizer may less appropriate., Pengembangan budidaya kentang perlu dilakukan untuk meningkatkan hasil produksi nasional, salah satu langkahnya yaitu dengan mengembangkan kentang di dataran medium 300 sampai 700 m dpl. Penelitian ini bertujuan untuk mengembangkan teknologi budidaya kentang pada dataran medium melalui pengaplikasian pupuk kieserite (Mg) dan naungan. Pelaksanaan penelitian di mulai dari bulan Agustus 2016 sampai dengan bulan Desember 2016. Penelitian ini menggunakan rancangan acak kelompok (RAK) faktorial yang terdiri dari dua faktor. Faktor pertama yaitu pupuk kieserite terdiri dari lima taraf : 0 kg/ha, 50 kg/ha, 100 kg/ha, 150 kg/ha, dan 200 kg/ha. Faktor kedua yaitu naungan dengan kerapatan 60% dan tanpa naungan. Hasil analisis data menunjukkan penggunaan naungan dengan kerapatan 60% berpengaruh sangat nyata pada tinggi tanaman umur 14 HST, 28 HST, dan 42 HST, luas daun 42 HST, serta berpengaruh sangat nyata terhadap jumlah umbi persampel, berat umbi persampel dan tidak berpengaruh nyata pada jumlah cabang tanaman. Perlakuan pupuk kieserite (Mg) memberikan pengaruh nyata pada jumlah cabang tanaman umur 42 HST, tetapi tidak berpengaruh terhadap tinggi tanaman umur 14 HST, 28 HST, dan 42 HST, luas daun 42 HST, jumlah umbi persampel, berat umbi persampel. Interaksi antara naungan dan pupuk kieserite (Mg) tidak memberikan pengaruh nyata pada tinggi tanaman, luas daun, jumlah cabang, jumlah umbi, dan berat umbi, hal ini diduga karena kurang sesuainya dosis dan intensitas pemberian pupuk kieserite (Mg) yang di aplikasikan.
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- 2018
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12. Understory Vegetation in Oil Palm Plantations Promotes Leopard Cat Activity, but Does Not Affect Rats or Rat Damage
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Hood, Amelia S. C., primary, Aryawan, A. Agung K., additional, Advento, Andreas D., additional, Purnomo, Dedi, additional, Wahyuningsih, Resti, additional, Luke, Sarah H., additional, Ps, Sudharto, additional, Snaddon, Jake L., additional, Foster, William A., additional, Caliman, Jean-Pierre, additional, Turner, Edgar C., additional, and Naim, Mohammad, additional
- Published
- 2019
- Full Text
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13. PEMANFAATAN PASIR NAMBO SEBAGAI BAHAN CAMPURAN LAPIS TIPIS ASPAL PASIR (LATASIR) KELAS B
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Purnomo, Dedi Indra, Sarita, Umran, and Prasetia, Muhammad Syarif
- Abstract
The latasir mixture using nambo sand and cemet tonasa as filler in the mixture is expected to obtain flexibility. For for that the aggregate characterisrtics and composition of the mixture must meet the specifications. The method used in this study using trial and error method is by making some specimens to be sampled. Methods of research aggregate testing , asphalt test and manufacture of specimSens on asphalt mixture with variation of bitumen content le 5,0%,5,5%,6,0%,6,5%,7,0%,7,5%,8%,8,5%,9%. Based on the results obtained from the aggregate sieve analysis data for Latasir mixture composition ie Sand nambo = 90% and Semen Tonasa Filler =1in 0%. In The Marshall mixture of Latasir between Pasir nambo and Semen Tonasa, the value of Asphalt Optimum (KAO) was 8.5%.
- Published
- 2017
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14. Complexity within an oil palm monoculture: The effects of habitat variability and rainfall on adult dragonfly (Odonata) communities.
- Author
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Luke, Sarah H., Dwi Advento, Andreas, Dow, Rory A., Aryawan, Anak Agung Ketut, Barclay, Holly, Eycott, Amy E., Hinsch, Julie K., Kurniawan, Candra, Naim, Mohammad, Mann, Darren J., Pujianto, Purnomo, Dedi, Rambe, Tuani Dzulfikar Siguga, Slade, Eleanor M., Soeprapto, Ps, Sudharto, Suhardi, Tarigan, Ribka Sionita, Wahyuningsih, Resti, and Widodo, Rudy Harto
- Subjects
ODONATA ,OIL palm ,DRAGONFLIES ,VEGETATION management - Abstract
Copyright of Biotropica is the property of Wiley-Blackwell and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
- Published
- 2020
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15. Replanting of first‐cycle oil palm results in a second wave of biodiversity loss.
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Ashton‐Butt, Adham, Willcock, Simon, Purnomo, Dedi, Suhardi, Aryawan, Anak A. K., Wahyuningsih, Resti, Naim, Mohammad, Poppy, Guy M., Caliman, Jean‐Pierre, Peh, Kelvin S.‐H., and Snaddon, Jake L.
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OIL palm ,INVERTEBRATE diversity ,INVERTEBRATE communities ,FOREST conversion ,BIODIVERSITY - Abstract
Conversion of forest to oil palm plantations results in a significant loss of biodiversity. Despite this, first‐cycle oil palm plantations can sustain relatively high biodiversity compared to other crops. However, the long‐term effects of oil palm agriculture on flora and fauna are unknown. Oil palm has a 25‐year commercial lifespan before it must be replanted, due to reduced productivity and difficulty of harvesting. Loss of the complex vegetation structure of oil palm plantations during the replanting process will likely have impacts on the ecosystem at a local and landscape scale. However, the effect of replanting on biodiversity is poorly understood.Here, we investigate the effects of replanting oil palm on soil macrofauna communities. We assessed ordinal richness, abundance, and community composition of soil macrofauna in first‐ (25‐ to 27‐year‐old) and second‐cycle oil palm (freshly cleared, 1‐year‐old, 3‐year‐old, and 7‐year‐old mature).Macrofauna abundance and richness drastically declined immediately after replanting. Macrofauna richness showed some recovery 7 years after replanting, but was still 19% lower than first‐cycle oil palm. Macrofauna abundance recovered to similar levels to that of first‐cycle oil palm plantations, 1 year after replanting. This was mainly due to high ant abundance, possibly due to the increased understory vegetation as herbicides are not used at this age. However, there were subsequent declines in macrofauna abundance 3 and 7 years after replanting, resulting in a 59% drop in macrofauna abundance compared to first‐cycle levels. Furthermore, soil macrofauna community composition in all ages of second‐cycle oil palm was different to first‐cycle plantations, with decomposers suffering particular declines.After considerable biodiversity loss due to forest conversion for oil palm, belowground invertebrate communities suffer a second wave of biodiversity loss due to replanting. This is likely to have serious implications for soil invertebrate diversity and agricultural sustainability in oil palm landscapes, due to the vital ecosystem functions that soil macrofauna provide. [ABSTRACT FROM AUTHOR]
- Published
- 2019
- Full Text
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