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Danang Widjajanto
Sekretariat Unit Penelitian dan Pengabdian kepada Masyarakat (UP2M) Politeknik Negeri Jakarta Gedung Direktorat Lt.2, Telp.(021) 7270036 Psw. 236 Fax (021)7270034 Kampus Baru Universitas Indonesia Depok, DEPOK 16425 Email: politeknologi_pnj@yahoo.co
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Journal : AGROTEKBIS

 1 
PENGARUH PEMBERIAN BOKASI TITONIA (Titonia diversifolia) PADA OXIC DYSTRUDEPTS LEMBAN TONGOA TERHADAP SERAPAN P DAN PRODUKSI BAWANG MERAH (Allium ascalonicum L.) VARIETAS LEMBAH PALU Rara, Sely Limbong; Wahyudi, Imam; Widjajanto, Danang
AGROTEKBIS Vol 1, No 1 (2013)
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This study attempted to determine changes in Phosphorus (P)  uptake and the onion production by applying Titonia bokashi (Titonia diversifolia) in this oxic Dystrudepts  soil from Lemban Tongoa village from Palolo district, in pot experiment. The research was compiled in a Randomized Design (RBD) consists of 7 level of doses  of bokashi  namely control (without bokashi),  5 t ha-1,  10 t ha-1,  15 t ha-1 ,  25 t ha-1, 40 t ha-1, and 60 t ha-1, each treatment was repeated three times. Results showed that application of bokashi in oxic Dystrudepts significantly affect on changes in soil chemical properties, the Aldd reduced but available and total P, soil pH, plant dry weight, C-organic,  P uptake by onion increased.  Highest phosphorus (P) in onion (Allium ascalonicum L.) was found when Titonia bokashi  applied at a dose of 40 t ha-1.
KARAKTERISTIK FISIK TANAH PADA BEBERAPA PENGGUNAAN LAHAN DI DESA BEKA KECAMATAN MARAWOLA KABUPATEN SIGI Bintoro, Ahmad; Widjajanto, Danang; Isrun, Isrun
AGROTEKBIS Vol 5, No 4 (2017)
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This study aimed to determine the characteristics of the soil under forest land, dry land, degraded land, shifting cultivation, mixed plantation, and house yards in Beka Village, Marawola Sub District of Sigi District. Three sites from each land use were determined where three soil samples were taken from each site at 0–20 cm depth using soil rings. Parameters observed included soil permeability, bulk density, porosity, water content at saturated and field capacity condition, and upper and lower plasticity limits. The soil permeability ranged from less to very fast while the soil bulk density from light to heavy. The saturated water contents were found to be 40.35% to 53.00% while the field capacity water content to be 20.18% to 26.50%. The upper and lower plasticity limits ranged from moderate to high. Key Words : Beka village, land use, and soil physical characteristic.
BEBERAPA SIFAT FISIKA INCEPTISOL WATUTELA DALAM KAITANNYA DENGAN PEMBERIAN BAHAN ORGANIK DAN SUHU PEMANASAN Jusman, Jusman; Widjajanto, Danang; Hasanah, Uswah
AGROTEKBIS Vol 5, No 2 (2017)
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This study aims to determine some physical properties Inceptisols Watutela in relation to organic matter and heating temperature. The research method is through laboratory experiments using completely randomized design (CRD), which consists of two factors. The first factor is the treatment of soil organic matter derived from goat droppings and the second factor is the heating temperature treatment. Each treatment consists of three levels and repeated 6 times to obtain         54 experimental units. Treatments organic matter goat manure include: without organic matter or Control (A0), organic matter with a level of 2.5% by weight of the ground (A1), and organic matter to the level of 5% of the weight of the soil used in the research (A2). Level-the level used in the heating temperature treatment includes heating at room temperature (P0), heating in an oven at a temperature of 50°C (P1) and heating it in an oven at 70°C (P2). Data processing studies to determine the effect of treatment among study done using ANOVA F test, subsequent treatment effect was tested further by honestly significant difference test (HSD). The research variables were observed consisting of: saturated soil water content, water content of field capacity, soil bulk density, soil porosity and soil aggregate stability. The results showed that the characteristics of Inceptisols Watutela the initial soil analysis showed a sandy loam texture, organic C content of 0.89% (relatively low). Based on observations showed that organic matter goat droppings and the heating temperature individually provide highly significant effect on all variables observed physical properties of soil. The interaction between organic material and the heating temperature very significant effect on saturated soil water content and soil porosity. On the other hand, the interaction between organic matter and heating temperature effect no significant effect on the measurement of field capacity moisture content, soil bulk density and soil aggregate stability Keywords: Inceptisol, Organic Material, Physical Properties Of Soil,Temperature
IDENTIFIKASI MORFOLOGI FUNGI MIKORIZA ARBUSKULA (FMA) PADA BERBAGAI JENIS TANAMAN HORTIKULTURA DI LAHAN PERTANIAN DESA NUPABOMBA Liana, Liana; Patadungan, Yosep Soge; Widjajanto, Danang
AGROTEKBIS Vol 6, No 5 (2018)
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The research aimed at identifying the morphology of mycorrhizal arbuscular fungi (MAF) on the root zones of different horticultural crops (peppers, potato, leek, cabbage, tomato and chicory) in Nupabomba village Tanatovea sub district of Donggala.  It was descriptive exploratory study and conducted from October to December 2015. Samples of soil were purposively taken around the root zone and analyzed for its chemical and physical characteristics as well as for mycorrhizae  spore isolation and its identification.  The research results showed that the highest spore number of 303 spores per 10 g was found in the leek plantation whereas the lowest number of 43 spores per 10 g in the potatoes plantation.  There are four types of spore genus i.e. Acaulaspora, Entrophospora, Glomus and Paraglomu.  The Glomus genus was the dominant spores found in all types of the horticultural plantations.
PENGARUH PEMBERIAN BOKASI TITONIA (Titonia diversifolia) PADA OXIC DYSTRUDEPTS LEMBAN TONGOA TERHADAP SERAPAN P DAN PRODUKSI BAWANG MERAH (Allium ascalonicum L.) VARIETAS LEMBAH PALU Rara, Sely Limbong; Wahyudi, Imam; Widjajanto, Danang
AGROTEKBIS Vol 1, No 1 (2013)
Publisher : AGROTEKBIS

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

Abstract

This study attempted to determine changes in Phosphorus (P)  uptake and the onion production by applying Titonia bokashi (Titonia diversifolia) in this oxic Dystrudepts  soil from Lemban Tongoa village from Palolo district, in pot experiment. The research was compiled in a Randomized Design (RBD) consists of 7 level of doses  of bokashi  namely control (without bokashi),  5 t ha-1,  10 t ha-1,  15 t ha-1 ,  25 t ha-1, 40 t ha-1, and 60 t ha-1, each treatment was repeated three times. Results showed that application of bokashi in oxic Dystrudepts significantly affect on changes in soil chemical properties, the Aldd reduced but available and total P, soil pH, plant dry weight, C-organic,  P uptake by onion increased.  Highest phosphorus (P) in onion (Allium ascalonicum L.) was found when Titonia bokashi  applied at a dose of 40 t ha-1.
Co-Authors A.A. Ketut Agung Cahyawan W Abdul Rahman Adrianton Adrianton Ahmad , Virzha Rafiq Anthon Monde Aulia, Windi Baehaqi Bintoro, Ahmad Bunga Elim Somba Endang Saepudin, Endang Fera Frahastuti, Frahastuti Ilham Bakri Abdul Rahim Thaha,Isrun, Ilham Bakri Isrun Isrun Khaliq, Moh. Adnan Kusumastuti, Sri Lestari Liana Liana Nadhiroh, Nuha Nuraqil, Noufal Nurfadila Nurfadila, Nurfadila Oktavina, Trisni Patadungan, Yosep Soge Prahastuti, Sri Wahidah Rois Rosmaniar Gailea Sely Limbong Rara Setiana, Hatib Sutanto Sutanto Toto Supriyanto Uswah Hasanah Yuspita, Opi Isra Zainuddin, Rachmat