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31	Landfill	ABS-19
CPT DATA BASED GEOTECHNICAL INFORMATION SYSTEM WITH ARCGIS ASSISTANCE IN JAYAPURA CITY 1Reny Rochmawati, 2Iis Roin Widiati Faculty of Engineering, Universitas Yapis Papua, Jayapura, Indonesia Abstract Jayapura city, located in eastern Indonesia, is the center of the most populous settlement in Papua Province. Jayapura City is an area with a fairly fast economic growth rate. Constructing civil buildings needs special handling, especially in foundation design. To design a foundation, information on the quality of the soil that is able to support the load is needed so that the foundation can rest well on it. Therefore, a preliminary study is needed, namely geotechnical investigations can be carried out by direct investigation methods in the field (in situ test), one of which is the CPT (Cone Penetratinon Test). From the calculation of the soil bearing capacity obtained from the CPT method, it is used as a zoning map using ArcGis 10.3 software. Based on the distribution of CPT data in the city of Jayapura which was processed using ArcGIS 10.3, the results of the depth of soil density with a qc value of 20 kg / cm2 were obtained at a depth of 0.6 meters to 16 meters, the results of the depth of soil density with a qc value of 40 kg / cm2 were obtained in a depth of 1.6 meters to 18 meters, and the results of the depth of soil density with a qc value of 120 kg / cm2 are obtained at a depth of 2.9 meters to 20 meters. Keywords: Jayapura City, CPT (Cone Petetration Test), ArcGIS 10.3 Share Link | Plain Format | Corresponding Author (Reny Rochmawati)

32	Landfill	ABS-31
Identification and Behavior of Heavy Metals in Soil of Antang Landfill Makassar South Sulawesi Using AAS Method Andi Artiningsih (a), Sri Widodo (b*), Nurliah Jafar (c), Alfian Nawir (c), Harwan (c), Sitti Ratmi Nurhawaisyah (c) (a) Chemical Engineering, Faculty of Industrial Technology, Universitas Muslim Indonesia 90231, Indonesia (b) Mining Engineering Department, Faculty of Engineering, Hasanuddin University 90245, Indonesia *srwd007[at]yahoo.com (c) Department of Mining Engineering, Faculty of Industrial Technology, Universitas Muslim Indonesia 90231, Indonesia Abstract The Tamangapa Antang landfill located in the Antang Subdistrict is the center of Landfill for all regions in Makassar city. Waste processing techniques at Antang Landfill Makassar City South Sulawesi Indonesia use the Open Dumping system so that it has the potential to pollute the surrounding soil. Research has been conducted on the distribution of heavy metals Cu, Pb and Zn in the soil around the Antang landfill. The study aims to analyze the potential spread of heavy metals to the soil around the Antang Landfill. The sampling point is divided into four Points, two Points in the direction of ground water flow (Point A and Point C), two Points perpendicular to groundwater flow (Point B and Point D). Soil sampling is done with depth 0 to 10 cm, 10 to 20 cm and 20 t0 30 cm. Total soil samples analyzed by heavy metal element by Atomic Absorption Spectroscopy method, were twelve samples. The results showed that Cu heavy metals concentration was at the highest level. Followed by heavy metal Zn, where the highest concentration is detected at Point A and Point D, its concentration has exceeded the threshold, except at Point B and Point C, its concentration is still below the threshold permitted by the Government of Indonesia and General of Drug Control and food. While for heavy metal Pb at Point A, Point B and Point C, the concentration is still below the threshold, since it was in the rainy season when samples were taken, that is why the concentration of Pb heavy metal decreased. Keywords: Landfill- Soil- Open dumping- Heavy metal- Makassar City Share Link | Plain Format | Corresponding Author (Andi Artiningsih Manggappa)

33	Landfill	ABS-33
Landslide susceptibility mapping using Geographic Information System (GIS) and remote sensing data in North Luwu, South Sulawesi Province Citra Aulian Chalik (a), Sri Widodo(b*), Andi Fahdli Heriansyah (a), Muhammad Hardin Wakila (a), Nurliah Jafar (a), Sitti Ratmi Nurhawaisyah (a), Firdaus (a) (a) Mining Engineering Department, Faculty of Industrial Technology, Universitas Muslim Indonesia 90231, Makassar (b) Mining Engineering Department, Faculty of Engineering, Hasanuddin University 90245, Indonesia *srwd007[at]yahoo.com Abstract Climate, topography, and rock conditions in Indonesia are relatively diverse, both physical and chemical, these conditions can cause adverse consequences such as floods, landslides, forest fires and droughts. The Information from Volcanology and Geological Disaster Mitigation on Monday July 13, 2020, flash floods and flow of debris due to landslides were occurred in Masamba and Baebunta, North Luwu, South Sulawesi Province. The purpose of this paper is to map the distribution of landslide susceptibility area using remote sensing and GIS data. The Method used to analyze the landslide susceptibility estimation model refers to the Center for Research and Development of Agricultural Land Resources (BBSDLP). The parameters used in this model are rainfall, soil type, rock type, slope, land use, and land movement. The BBSDLP Landslide Susceptibility Estimation Model in study area shown that there are three classes of landslide susceptibility, such as low, medium, and high susceptibilities. There are six subdistricts which are in medium to high landslide susceptibility, and the others are low to medium landslide susceptibility. The locations of landslides and flash floods that occurred in Masamba and Baebunta indicate areas with medium to high landslide susceptibility. Keywords: Landslide, Remote Sensing, GIS Share Link | Plain Format | Corresponding Author (Citra Aulian Chalik)

34	Landfill	ABS-69
Landslide Susceptibility Areas Mapping Using GIS and Remote Sensing Data in Palopo and North Luwu, South Sulawesi Province Citra Aulian Chalik (a), Andi Fahdli Heriansyah (a), Muhammad Hardin Wakila (a), Sri Widodo(b), Nurliah Jafar (a), Sitti Ratmi Nurhawaisyah (a) (a) Mining Engineering Department, Faculty of Industrial Technology, Universitas Muslim Indonesia 90231, Makassar (b) Mining Engineering Department, Faculty of Engineering, Hasanuddin University 90245, Indonesia Abstract Indonesia has two hot and rainy seasons which can show quite extreme changes in weather, temperature and wind direction. Climate, topography, and rock conditions in Indonesia are relatively diverse, both physically and chemically. These conditions can cause adverse consequences such as floods, landslides, forest fires and droughts. Besides the influence of natural conditions, human activities can also cause environmental damage that will increase and often occur in many regions in Indonesia. The landslide disasters that occurred in Palopo City on 26 June 2020 and in North Luwu on 13 July 2020 are evidence of landslide-prone areas in South Sulawesi. The aim of this research is to map landslide susceptibility areas using GIS and Remote Sensing data. Remote sensing data used is the ASTER L1T and DEMNAS image data. ASTER L1T image processing and supervised classification is carried out to obtain a vegetation density map. DEMNAS data is processed to obtain a slope map. The vegetation density map and slope map will be overlaid with geological maps, rainfall maps and land use maps then scoring is done to get landslide prone areas. The research result is a map of landslide-prone areas with a landslide level classification consisting of high, medium and low potential areas. This map can be used as a reference in natural disaster mitigation as well as for recommendations in spatial planning. Keywords: Landslide, Remote Sensing, ASTER, DEMNAS Share Link | Plain Format | Corresponding Author (Andi Savitri Reskiana)

35	Landfill	ABS-70
Identification And Behaviour Of Heavy Metals In Soil Of Antang Landfill Makassar South Sulawesi Using AAS Method A Artiningsih, S Widodo, Nurliah Jafar, Alvian Nawir, Harwan, and S Ratmi Nurhawaisyah Hasanuddin University, Universitas Muslim Indonesia Abstract The Tamangapa Antang landfill located in the Antang Subdistrict is the center of the Landfill for all regions in Makassar City. Waste processing techniques at Antang Landfill Makassar City South Sulawesi Indonesia use to Open Dumping System so that it has the potential to pollute the surrounding soil. Research has been conducted on the distribution of heavy metals Cu, Pb, and Zn in the soil around the Antang landfill. The study aims to analyze the potential spread of heavy metals to the soil around the Antang Landfill. The sampling point is divided into four Points, two Points in the direction of ground water flow (Point A and Point C), two Points perpendicular to groundwater flow (Point B and Point D). Soil sampling is done with depth 0 to 10 cm, 10 to 20 cm and 20 to 30 cm. Total soil samples analyzed by heavy metal element by Atomic Absorption Spectroscopy method, were twelve samples. The results showed that Cu heavy metals concentration was at the highest level. Followed by heavy metal Zn, where the highest concentration is detected at Point A and Point D, its concentration has exceeded the threshold, except at Point B and C its concentration is still below the threshold permitted by the Goverment of Indonesia and General of Drug Control and food. While for heavy metal Pb at Point A, Point B and Point C, the concentration is still below the threshold, since it was in the rainy seasion when samples were taken, that^s why the concentration of Pb heavy metal decreased. Keywords: Landfill, Soil, Open Dumping, Heavy Metal, Makassar City. Share Link | Plain Format | Corresponding Author (Afrizal Surya Erlangga)

36	Material Science and Health Community Services	ABS-5
Spatial Mapping of Aedes Sp. Densities and Endemicity Level of DHF in Three Villages in South Sulawesi, Indonesia Hasanuddin Ishak1, Anwar Mallongi1, Agus B Birawida1, Syahribulan2 1 Department of Environmental Health, Faculty of Public Health- 2Department of Biology, Faculty of Mathematics and Natural Sciences, Hasanuddin University Abstract The study aim to analyze the spatial map of the density of Aedes sp., and to analyze the relationship between environmental factors (temperature, humidity, mosquito netting) and mosquito densities in Makassar City, Maros and Gowa Cities. The research method used an ecological study design. In this study, surveys of larvae, ovitrap and Lighttrap were be used to measure the density of Aedes sp in Paccerakkang Village, Makassar City, Bontoa Village, Maros City and Jenetallasa Village in Gowa City. Mosquitoes were killed with chloroform and identified using the identification key Huang (1979). Data processing using SPSS version 22 and Arview GIS 10.5. The results showed that the Larva and Ovitrap survey methods were specific measured the density of Dengue vectors of Aedes aegypti while the Light Trap method was not specific. There was a significant relationship between temperature, humidity and egg density and Aedes aegypti mosquitoes in three DHF endemic sub-districts- except humidity and mosquito density was not significant in Bontoa Village, Maros Regency (p> 0.05). There was no significant relationship between the wire netting factor and the density of Aedes aegypti mosquitoes in the three DHF endemic sub-districts except for the mosquito density there was a significant relationship in Bontoa Village, Maros Regency. Keywords: Aedes, GIS, Mosquito Density, Air Temperature, Humidity Share Link | Plain Format | Corresponding Author (Prof dr. Hasanuddin Ishak, MSc, PhD)

37	Material Science and Health Community Services	ABS-6
Geology and hydrothermal alteration of Tambulun Cu-Au skarn prospect in Sulit Air area, Solok district, West Sumatra province, Indonesia Afrilita, Arifudin Idrus* and I Wayan Warmada Department of Geological Engineering, Universitas Gadjah Mada, Yogyakarta, Indonesia *Corresponding author: arifidrus[at]ugm.ac.id Abstract Study area is located at Tambulun copper-gold skarn prospect and its vicinity in Sulit Air area, Solok district, West Sumatra, Indonesia. The prospect has been known for a long time, however, detailed study on alteration and ore mineralization characteristics is not done yet. This study, therefore, is dealing with geological framework and characteritics of mineralogy, and geochemistry of the skarn prospect. Surface geological and alteration mapping as well as various laboratory analyses including petrography, ore microscopy, FA-AAS and ICP-MS of selected samples taken were performed. Skarn alteration and mineralization mostly occurs along the contact between Triassic crytalline limestone of Tuhur Formation and Jurassic granodiorite of Sulit Air granitoid suite. Ore mineralization is structurally controlled by WNW-ESE dextral slip-fault and NE-SW, N-S sinistral slip faults. Skarn alteration is zoned upon intrusions from proximal to distal consisting of garnet-pyroxene, pyroxene-garnet and chlorite-epidote zones. Silicified (quartz-clinopyroxene) alteration is also locally observed. Copper bearing sulfides such as bornite and chalcopyrite as well as supergene products such as chalcocite, covellite, chrysocolla, azurite and malachite are intimately associated with proximal garnet-pyroxene zone. Ore mineralization shows elevated grades of 20.9% Cu, 8.02 g/t Au and 573 g/t Ag, respectively, and they show a positive correlation. Those preliminary data exhibit that the skarn prospect seems to be promising to be followed-up for the next-step systematic exploration. Keywords: skarn, copper, gold, Tambulun, Sulit Air, West Sumatra, Indonesia Share Link | Plain Format | Corresponding Author (Afrilita Afrilita)

38	Material Science and Health Community Services	ABS-11
Preliminary Study of Geology, Alteration and Ore Mineralization at East Motoling Area, South Minahasa District, North Sulawesi, Indonesia. Faiza Rahman Hakim and Arifudin Idrus Department of Geological Engineering, Universitas Gadjah Mada, Yogyakarta, Indonesia Abstract Keywords: Epithermal, East Motoling, North Sulawesi Share Link | Plain Format | Corresponding Author (Faiza Rahman Hakim)

39	Material Science and Health Community Services	ABS-21
Synthesis of Stigmasterol-Molecularly Imprinted Polymer and its Adsoption Performance P Taba (a), Riskawati (a), NH Soekamto (a), P Budi (a), A Sumidarti,(b) St Fauziah (a*) a) Department of Chemistry, Faculty of Mathematics and Natural Sciences, Hasanuddin University Jl. Perintis Kemerdekaan KM. 10, Tamalanrea Indah, Tamalanrea, Kota Makassar, 90245 b) Department of Concervative Dentistry, Faculty of Dentistry, Hasanuddin University Jl. Perintis Kemerdekaan KM. 10, Tamalanrea Indah, Tamalanrea, Kota Makassar, 90245 * stfauziah[at]unhas.ac.id Abstract Molecularly Imprinted Polymers, MIPs are synthetic polymer materials that can selectively recognize a certain molecule. Synthesis of the MIP was conducted via precipitation polymerization using methacrylate acid as a monomer, trimethylolpropane trimethacrylate as a cross linker, and stigmasterol as a target molecule. We studied the effect of temperature and concentration on the performance of MIP in rebinding the target molecule. Based on BET data, MIP was microporous polymer with a pore diameter of 1,69 nm. The adsorption of MIP was studied at an optimum time of 150 minutes. The adsorption of stigmasterol best fitted a pseudo second order model and a Langmuir isotherm with a capacity adsorption of 1.57 mg per gram. Keywords: MAA, MIP, stigmasterol, TRIM, Precipitation polymerization. Share Link | Plain Format | Corresponding Author (Paulina Taba)

40	Material Science and Health Community Services	ABS-22
The Effect of Using Linear Low Density Polyethylene (LLDPE) Powder and Rice Husk Ash on Compressive Strength and Intital Setting Time of Alkaline-Activated Mortar. Muhammad Sofyan, Ade Okvianti Irlan, Abdul Rokhman, Dicki Dian Purnama, RR. Nadiyah Rachmadani Utami Institut Teknologi PLN, Universitas Trisakti, Institut Teknologi PLN, Institut Teknologi PLN, Institut Teknologi PLN Abstract Fly Ash, Rice Husk Ash and Linear Low Density Polyethylene (LLDPE) Plastic Waste also contribute to environmental problems. Starting from the problem of CO2 emissions to ecosystem damage due to the accumulation of waste on the earth^s surface. Therefore, this study focuses on the use of Fly Ash, Rice husk ash and LLDPE Powder as a mixture of Alkaline-Activated Mortar. In this study, Fly Ash as a Pozzolanic Material mixed with Alkaline Activator Solution serves as a binder for Mortar. Rice husk ash is used as a substitute material for Fly ash while LLDPE powder functions as a substitute material for sand. The percentage of LLDPE powder used in the mortar mixture is from 0 to 15% of the total weight of the mixture. While the percentage of rice husk ash used in the mixture is 7%, Alkali Activator Solution 27% and Sand ranging from 24.5 to 39.5%. There are six variations of the mortar specimen (AAMP1, AAMP2, AAMP3, AAMP4, AAMP5, AAMP6). Initial setting time testing is done on binder mortar. The mortar compressive strength test was carried out at the age of 7 days after curing the oven at temperatures of 40oC and 60oC. From the test results obtained the highest compressive strength of 11.3 MPa on the EM6 test object with a curing temperature of 60oC where the percentage of LLDPE powder on the specimen is 15%. The core of the longest setting time is in the AAMP6 Alkaline-Activated Mortar binder variation, which is 180 minutes. Keywords: LLDPE Powder, Rice Husk Ash, Alkaline-Activated Mortar, Compressive Strength, Initial Setting Time Share Link | Plain Format | Corresponding Author (Muhammad Sofyan)

41	Material Science and Health Community Services	ABS-27
Mineralogical Study of Bauxite of Kenco Area, Landak District, West Kalimantan Province Nurliah Jafar (a), Sitti Ratmi Nurhawaisyah (a), Sri Widodo (b*), Citra Aulian Chalik (a), Andi Fahdli Heriansyah (a), Muhammad Hardin Wakila (a) (a) Mining Engineering Department, Faculty of Industrial Technology, Universitas Muslim Indonesia 90231, Indonesia (b) Mining Engineering Department, Faculty of Engineering, Hasanuddin University 90245, Indonesia *srwd007[at]yahoo.com Abstract Bauxite is the result of weathering rocks which have high aluminum content, low iron content and little quartz content. The formation of bauxite deposits is controlled by source rock which is rich in Al element, tropical climatic conditions and geomorphological conditions that allow the formation of the accumulation of weathered source rock products. One of the perspective locations of bauxite deposits in Indonesia are in Kenco area, Landak district, West Kalimantan Province. The aim of this study was to determine the type of bauxite based on the mineral composition of bauxite. Mineralogical characteristics of bauxite were investigated by using XRD. Samples were taken from each horizon vertically in the test pit which represented each different characteristic including top soil, ore zone, clay and fresh rock. The results of X-Ray Diffraction (XRD) analysis reveals gibbsite as the major bauxitic mineral associated with kaolinite, goethite, titanium-rich anatase and quartz. Bauxite is classified as orthobauxite based on X-ray diffraction (XRD) with the appearance of minerals on each horizon. The mineral groups in the overburden horizon, bauxite ore horizon and clay horizon are alumina, iron, titanium, silicates, carbonates, sulfides, and sulfates, while the source rock mineral groups are iron, titanium, silicate, and sulfate. The distribution of bauxite deposits in the study area is generally found on the slopes that are not too steep. Keywords: Bauxite- X-Ray Diffraction- Mineralogy- Gibbsite Share Link | Plain Format | Corresponding Author (Nurliah Jafar)

42	Material Science and Health Community Services	ABS-32
A Petrography Study of Bauxite of Kenco Area, Landak District, West Kalimantan Province Sitti Ratmi Nurhawaisyah (a), Nurliah Jafar (a), Sri Widodo (b*), Andi Artiningsih (c), Suriyanto Bakri (a) (a) Department of Mining Engineering, Faculty of Industrial Technology, Universitas Muslim Indonesia 90231, Indonesia (b) Mining Engineering Department, Faculty of Engineering, Hasanuddin University 90245, Indonesia *srwd007[at]yahoo.com (c) Chemical Engineering, Faculty of Industrial Technology, Universitas Muslim Indonesia 90231, Indonesia Abstract Lateritic bauxite are the products of intense weathering of rocks. It is largely controlled by bedrock type, time, climate (rainfall), and geomorphology. It is located in Kenco area, Landak district, West Kalimantan Province which the rest of the development of Cretaceous volcanism consisting of the island of Borneo Volcanic Formations Mensibau with unit members Granodiorite, quartz diorite and diorite, and the Formation of the Kingdom Volcanic Andesite-trachite units and Formations of alluvium and swamp sediment quarter. Petrography analysis was used for identifying source rock of lateritic bauxite. Rock samples were taken from fresh and weathering rock types which represented each different characteristic. The results of petrographic analysis showed that the source rock of the study area was granodiorite, granodiorite porphyry, gabbro porphyry and basalt porphyry. The main minerals in these rock types are orthoclase, plagioclase, and biotite. Direct observations in the field also support the results of the petrographic analysis that the source rock of the study area is diorite, granodiorite, diorite quartz and an indication of andesite intrusion. Keywords: Bauxite- Petrography- Laterite- Granodiorite Share Link | Plain Format | Corresponding Author (Sitti Ratmi Nurhawaisyah)

43	Material Science and Health Community Services	ABS-35
Optimum Value of Compressive Strength and Tensile Strength in Self Compacting Concrete (SCC) Variations in Chicken Eggshell Substitution Nasruddin, Victor S., Pratiwi M. Universitas Hasanuddin Abstract In the development of a country like Indonesia, which is a developing country and is increasing its development, primarily in the infrastructure sector, therefore the use of building materials such as concrete is also an increasing demand. As a result of the large number of uses of concrete, it shows that the increasing need for concrete in construction in the future. This has led to the need for innovation regarding the concrete itself and developments in concrete technology. The decreasing number of experts led to the need for a self-compacting concrete mixture that only required a few experts to work on it and high quality concrete was obtained. The strength of SCC concrete is very important in building structures. To achieve the planned strength of the SCC concrete, the amount of cement needed is important. Cement in Self Compacting Concrete (SCC) is very important because it acts as an adhesive between coarse aggregate and fine aggregate. The use of substitutes for cement in concrete mixtures has been widely practiced, especially the use of both organic and inorganic waste materials. One of the many wastes that we can easily find in Indonesia is eggshell waste. The purpose of this discussion is to analyze the optimum value of compressive strength and tensile strength in the SCC variation of chicken egg shell substitution. The research method used in this research was experimental method which was carried out at the structural laboratory of the Department of Architecture, Hasanuddin University. Quantitative research with experimental based on two variables (age and concrete curing) was also used as the research method. The data were obtained from the test specimen by measuring compressive strength and tensile value of the concrete with a Universial Testing Machine (UTM). The data analysis method used in the research was comparative analysis by using tabulations and charts. The results showed that the optimum value of concrete compressive strength can be achieved Keywords: Compressive Strength, Tensile Strength, Eggshell, Substitution Share Link | Plain Format | Corresponding Author (Nasruddin Junus)

44	Material Science and Health Community Services	ABS-72
THE EFFECT OF CURING ON COMPRESSIVE STRENGTH OF GEOPOLYMER MORTAR MADE RICESTRAW ASH, FLY ASH AND LATERITE SOIL Parea Rusan Rangan1, Rita Irmawaty2, M. W. Tjaronge3A. Arwin Amiruddin4, Bambang Bakri4and M. Tumpu1 1Doctoral Course Student, Civil Engineering Department, Hasanuddin University, Indonesia 2Associate Professor, Civil Engineering Department, Hasanuddin University, Indonesia 3Professor, Civil Engineering Department, Hasanuddin University, Indonesia 4Assistant Professor, Civil Engineering Department Hasanuddin University, Indonesia Abstract This study aims to analyze the effect of curing on the compressive strength of geopolymer mortar made from straw ash, fly ash and laterite soil. This research is experimental in the laboratory. Geopolymer mortar was produced using straw ash, fly ash and laterite soil with a percentage ratio of 16.67: 41.67: 41.67. The alkaline activator used is sodium hydroxide (NaOH) with a concentration of 12 M. The compressive strength test of 5 x 10 cm cylinders is used to evaluate the geopolymer mortar mixture produced at the age of 3, 7 and 28 days with curing, namely air and water curing.The results showed that the compressive strength of the geopolymer mortar increased along with the increasing age of each curing. The compressive strength values produced in air curing 3, 7 and 28 days were respectively 1.64 N/mm2, 1.72 N/mm2and 3.22 N/mm2. While water curing, the resulting compressive strength values for each curing are 1.03 N/mm2, 1.63 N/mm2and 1.68 N/mm2. At the ages of 3, 7 and 28 days, there was an increase in the compressive strength values from water curing to air curing, which were 0.37%, 5.23% and 47.82%, respectively. It can be seen that the compressive strength of the geopolymer mortar made from straw ash, fly ash and laterite soil in air curing is greater than that of water curing. Keywords: unhasftuh Share Link | Plain Format | Corresponding Author (ZUL FIKRAN ARBIE)

45	Material Science and Health Community Services	ABS-73
A Petrographic Study of Bauxite of Kenco Area, Landak District, West Kalimantan Province Sitti Ratmi Nurhawaisyah (a), Nurliah Jafar (a), Andi Artiningsih (b), Sri Widodo (c*), Suryanto Bakri (a) (a) Department of Mining Engineering, Faculty of Industrial Technology, Universitas Muslim Indonesia 90231, Indonesia (b) Chemical Engineering, Faculty of Industrial Technology, Universitas Muslim Indonesia 90231, Indonesia (c) Mining Engineering Department, Faculty of Engineering, Hasanuddin University 90245, Indonesia Abstract Lateritic bauxite are the products of intense weathering of rocks. It is largely controlled by bedrock type, time, climate (rainfall), and geomorphology. It is located in Kenco area, Landak district, West Kalimantan Province which the rest of the development of Cretaceous volcanism consisting of the island of Borneo Volcanic Formations Mensibau with unit members Granodiorite, quartz diorite and diorite, and the Formation of the Kingdom Volcanic Andesite-trachite units and Formations of alluvium and swamp sediment quarter. Petrograhy analysis was used for identifying source rock of lateritic bauxite. Rock samples were taken from fresh and weathering rock types which represented each different characteristic. The results of petrographic analysis showed that the source rock of the study area was granodiorite, granodiorite porphyry, gabbro porphyry and basalt porphyry. The main minerals in these rock types are orthoclasts, plagioclase, and biotite. Direct observations in the field also support the results of the petrographic analysis that the source rock of the study area is diorite, granodiorite, diorite quartz and an indication of andesite intrusion. Keywords: Bauxite- Petrographic, Laterite Share Link | Plain Format | Corresponding Author (Andi Savitri Reskiana)

46	Material Science and Health Community Services	ABS-83
CLEAN WATER USER BEHAVIOR CLEAN WATER SAVINGS IN TOPOYO MAMUJU Takdir Musa1, Slamet Trisutomo2, Arifuddin Akil3 1Bagian Manajemen Perkotaan, Program Pascasarjana, Universitas Hasanuddin (email: takdir.musa[at]yahoo.com) 2Bagian Manajemen Perkotaan, Program Pascasarjana, Universitas Hasanuddin (email: trisutmo[at]gmail.com) 3Bagian Pengembangan Wilayah Kota, Program Pascasarjana, Universitas Hasanuddin (email: arifuddinak[at]yahoo.co.id) Abstract The purpose of this study is to analyze people^s behavior in using clean water based on their water source and the faktors that influence that behavior. This research method through data collection is done by observing the level of education, type of work, income level, number of people, analysis of the relationship between social and cultural faktors. Data were analyzed by crosstab analysis. The results showed that community behavior in using clean water tended to be very dependent on SPAM (90.6%) compared to wells (9.4%) as a source of clean water for household and non-household water use. Chi square test results show there is a relationship between the variables of clean water sources to domestic use (0.00) and non-domestic (0.025) <&#945- (0.05). Faktors that influence the behavior of clean water users in general in the Topoyo community are social and cultural faktors where the results of the domestic chi square test (0.00) and non-domestic (0.025). By zoning the use of clean water is only influenced by a number of variables. Keywords: Acid mine drainage, Acidic mine water, XRD Test, Microscopic Share Link | Plain Format | Corresponding Author (Afrizal Surya Erlangga)

47	Material Science and Health Community Services	ABS-87
Study of Mineralogy and Texture of Iron Ore Deposits Prospect Bontocani Area Bone Regency, Indonesia Hasbi Bakri1,2, A.M.Imran3, Ulva Ria Urfan3, Adi Maulana3 1Earth and Environmental Technology Study Program, Universitas Hasanuddin, Makassar 2Mining Engineering Department, Universitas Muslim Indonesia, Makassar 3Geological Engineering Department, Universitas Hasanuddin, Makassar Email : hasbi.bakri[at]umi.ac.id Abstract Study of mineralogy and texture of iron ore deposit from two sites (Pake and Tanjung) Bontocani area Bone Regency, South Sulawesi is reported. The objective of the study is to identify types of minerals and textures of Fe-bearing minerals, ore minerals other than Fe-bearing minerals and gangue. The identification of mineral types and textures was carried out by integrating the results of laboratory analysis on mineral and XRD (X-Ray Diffraction) samples. Iron ore-bearing minerals found in both sites consist of oxides (magnetic, hematite, ilmenite), hydroxide (goetite), carbonate (siderite). Other ores associated with iron -bearing in the Tanjung area include pyrite, chalcopyrite, covellite, sphalerite, cromite, manganite, cooperite and cristobalite whereas in Pake are manganite, pyrolusite, azurite, alabandite. The gangue minerals found in the Tanjung site consist of calcite, quartz, albite, diopside, hedenbergite, danalite, andradite, magnesite, fluorine and Pakke site including calcite, quartz, magnesite, flouroapatite, chlorite, anortite, andradite. The textures of the ore found in these two areas are open space filling, replacement, intergrowth and granular. Keywords: iron, XRD, mineral, texture, Tanjung, Pake Share Link | Plain Format | Corresponding Author (Hasbi Bakri)

48	Material Science and Health Community Services	ABS-91
Physical and Chemically Changes in Limestone Intruded by Trachytic Dyke: Implications for Cement Raw Material Ulva Ria Irfan (a*), A. M. Imran (a), M. Nur Asyikin Abbas (b) a) Geological Engineering Department, Faculty of Engineering, Universitas Hasanuddin, Gowa 92119, South Sulawesi, Indonesia. *ulvairfan[at]yahoo.com b) PT. Vale Indonesia Tbk., Sorowako, South Sulawesi, Indonesia Abstract The objective of this study to analyze the physical and chemical changes in limestone intruded by a trachytic dike, which is used as a raw material for cement. Limestone around the Poloe area, Pangkep Regency, South Sulawesi Province, Indonesia, has been used as raw material for cement. The research method was carried out by observed at the physical changes of limestone from intrusion contact every five meters so that there was invisible effect of the intrusion. Analysis of mineral and geochemical composition of rock samples used petrographic and XRF (X-Ray Fluorescence) methods. Field observations show a gradation of color difference from intrusion contacts in reddish-gray, gray to grayish-white at a distance of 70 meters from the intrusion contact. Microscopically, it shows distinction in grain size smoothing the limestone to the area of influence at a distance of 0 to 5 meters, and on a rock, contact indicate metasomatism in the limestone at a distance of 0 - 5 meters which forming garnet and wollastonite. Limestone shows a decreasing trend in degree of CaO2, Fe2O3, and an increase in SiO2, Al2O3, and MgO towards the intrusion contact. Based on the level of saturation, limestone in the study area can be used as raw material for cement. While the corresponding chemical composition of limestone constituents, a recommended distance of 5 - 70 meters from the intrusion contact. Keywords: Limestone, trachyte, mineralogy, geochemistry, cement, Pangkep Share Link | Plain Format | Corresponding Author (Ulva Ria Irfan)

49	Material Science and Health Community Services	ABS-101
Geoelectrical Resistivity and Geochemical Method for Groundwater Investigation in the Coastal Sediment Asnur Azis (a), Ulva Ria Irfan (b*), Ilham Alimuddin (b) a) Graduate Student of Geological Engineering Department, Faculty of Engineering, Universitas Hasanuddin, Gowa 92119, Indonesia. b) Geological Engineering Department, Faculty of Engineering, Universitas Hasanuddin, Gowa 92119, Indonesia. *E-mail: ulvairfan[at]yahoo.com Abstract New study on the use of geoelectrical resistivity methods, coastal sediment properties, and geochemical analysis for the delineation and mapping of heavy metals in aquifer systems are presented in this research. A total of 3 surveys geoelectrical resistivity lines with the Wenner Schlumberger configuration were carried out to determine the subsurface characteristics. Geochemical analysis was performed on sediment samples obtained from 3 selected locations. Based on the results of data analysis, the concentration of Cd (0.94-2.42 mg / kg) was found to be higher in the northern part and the concentration of Cr (4.39-72.98 mg / kg), Ni (12.11-47.69 mg / kg) and Co (7,19-12,86) were found to be higher in the southern part of the study site. While, the distribution of heavy metals in the northern and southern parts of the distribution of Cd, Cr, Ni and Co metals was relatively high while in the middle is low. Geochemical analysis of sediment samples shows that in the resistivity zone (<20 ohm-m) the concentrations of Cd and Cr are relatively high. Starting from the mid to northwest zone, the resistivity values appear to be low. While resistivity values of more than 40 ohm-m can be interpreted as an aquifer zone. Therefore, it can be concluded that the possibility of heavy metal zones in the aquifer system is easily described by the geoelectrical resistivity distribution presented in the form of a depth section. Keywords: Geoelectrical Resistivity- Groundwater- Heavy Metals- Geochemistry- Coastal Sediment Share Link | Plain Format | Corresponding Author (Ulva Ria Irfan)

50	Material Science and Health Community Services	ABS-108
Preliminary Study of Scandium Enrichment in Lateritic Profile from Weathered Ultramafic Rock in Lapaopao Area Kolaka Regency of Southeast Sulawesi Suharto Onggang (a*), Adi Maulana (b), Sufriadin (c), Ulva Ria Irfan (c) a) Doctoral Student in Earth and Environmental Technology Study Program, Faculty of Engineering, Hasanuddin University * Suharto_mks[at]yahoo.com b) Geology Department, Faculty of Engineering, Hasanuddin University c) Mining Department, Faculty of Engineering, Hasanuddin University Abstract Scandium is one of the rare earth elements which is currently widely used for various needs such as the aerospace industry, solid oxide fuel cells, electronics industry and in metallurgical applications. Generally, Scandium appears in small amounts so its structural role in the host minerals cannot be readily identified. Some studies reported the scandium extraction from lateritic nickel deposit where may contain considerable amount of scandium in addition to nickel and cobalt. Preliminary research of scandium enrichment has been investigated from the ultramafic rock indicates that an enrichment of scandium concentration was found in the red limonite. The aim of this study was to investigate the potentially enrichment of scandium mineral from nickel laterite in Lapaopao Area. There are a total of 38 samples from 1 (one) diamond drill holes which represent the limonite, saprolite and bedrock profiles have been collected and studied to investigate the distribution pattern of Sc grades within the lateritic profile. These samples are being analyzed by XRF for major and minor element and ICP-OES method for rare earth element assaying. The study has confirmed that scandium is enriched in limonite layer of weathered ultramafic laterite profile. The scandium content from the ultramafic bedrock is 15 ppm and has enriched until 81 ppm of scandium in the limonite layer. Keywords: Scandium, rare earth element, Lapaopao, Sulawesi, Indonesia. Share Link | Plain Format | Corresponding Author (Suharto Onggang)

51	Material Science and Health Community Services	ABS-112
The Effect of Covid-19 Pandemic on Supply Chain Management: A Review D Dwiraharja1* , R. Arifuddin2 and S Burhanuddin2 University Of Hasanuddin Abstract This study aims to identify the factors which affected to the distribution of supply chain in Indonesia. The exploitation of victims from 2019 to 2021 shows a negative trend by arising numbers of patients who felt the virus. The Indonesian government applied national border and restricted area around as well as health protocol in all over places. COVID-19 crisis has created a new set of challenges to which supply chain managers must respond. As demand for home delivery services surge, supply chains have to adapt their supply replenishment processes, their order fulfilment processes and hire new employees to be trained in the specifics of order picking and home delivery. The COVID-19 pandemic has emerged as a significant health risk, and countries around the world have responded with partial shutdowns of their economies to slow the pace of infections. These measures have reportedly led to massive disruptions in the global and domestic supply chains. The findings in extant literature show that supply chains during COVID-19 are more fragile for products that travel long distances before reaching their final point of sale. Our work highlights how online data can be used in conjunction with other data-sets for real-time policymaking. This paper conceptually examines the impact of COVID-19 on supply chain disruption and response strategies adopted. Keywords: supply, chain, management, covid Share Link | Plain Format | Corresponding Author (Deni Dwiraharja)

52	Renewable Energy	ABS-2
Rainwater Harvesting to Increase Freshwater Carrying Capacity on Small Islands (Study Case : Pramuka Island) Pugar Girdayanto (a*), Ahmad Munir (a), Peter Davey (b) a) Universitas Hasanuddin, Jl. Perintis Kemerdekaan KM.10, Tamalanrea Indah, Kec. Tamalanrea, Kota Makassar, Sulawesi Selatan 90245, Indonesia *pugarsg[at]gmail.com b) Griffith University, Nathan Campus, 170 Kessels Rd, Nathan Queensland 4111, Australia Abstract Pramuka Island is a small island which is covered with dense housing settlement, being inhabited by 1.715 people and experiencing rapid population growth with increasing tourist visits every year (Cahyadi, 2015). As a result, there is a high demand for freshwater that exploits a large amount of groundwater on that island. On the other hand, research conducted by Cahyadi (2015) indicated that groundwater on Pramuka Island is below the minimum standard of drinking water. This report will discuss the effectivity of the rainwater harvesting system as a solution to the freshwater carrying capacity on Pramuka Island. To do this, it will analyse freshwater carrying capacity based on water balance calculation between freshwater supply with rainwater harvesting and potential freshwater demands for domestic use, tourism, and other activities. The results revealed that the scenario to use the whole island as rainwater catchment is enough to supply freshwater demand for about 27 years Keywords: carrying capacity- freshwater scarcity- small island- rainwater harvesting Share Link | Plain Format | Corresponding Author (Pugar Septia Girdayanto)

53	Renewable Energy	ABS-15
ANALYSIS MIXED CHARACTERIZATION OF KALIMANTAN COAL AND MANGROVE WOOD CHARCOAL CHARACTER AS BRIQUETTE RAW MATERIAL Rahmaniar Rahman, Busthan Azikin, Dahlang Tahir, Sri Widodo 1 Graduate Student of Earth and Environmental Technology, Geological Engineering Department, Faculty of Engineering, Hasanuddin University 90245, Indonesia 2 Geological Engineering Department, Faculty of Engineering, Hasanuddin University 90245, Indonesia 3 Physics Sciences, Faculty of Science FMIPA, Hasanuddin University 90245, Indonesia 4 Mining Engineering Department, Faculty of Engineering, Hasanuddin University 90245, Indonesia Abstract This study using three types of coal from East Kalimantan and South Sulawesi Mangrove Wood Charcoal which consisted of various compositions. In sample analysis using analysis, namely: proximate, ultimate, and calorific value. Proximate analysis: ash content, volatile matter, moisture content, fixed carbon- ultimate analysis: carbon and sulfur content and the calorific value using the bomb calorimeter method. The results of the proximate analysis showed that the fixed carbon content was obtained in the mixture of MWC 75% + KJA 25% = 52.45%, while the lowest was obtained at IC 100% = 32.86%. The highest volatile matter was obtained at KJA 100% = 44.23%, the lowest was at MWC 75% + KJA 25% = 31.90%- The highest ash content was IC 100% = 9.14% the lowest was at MWC 75% + KJA 25% = 5.94% and the highest moisture content was seen at IC 100% = 15.17% but MWC 75% + IC 25% = 9.52%. The results of the ultimate analysis showed that the lowest sulfur content was in the mixed variation of MWC 75% + KJA 25% = 0.168%, while the highest sulfur content was obtained at IC 100% = 0.874%. However, it was still in the low sulfur category <1. The highest calorific value is obtained by varying the composition at MWC 75% + IC 25% = 5919 cal/gram, while the lowest was obtained at KJA 100% = 4913 cal/gram. So based on this research, the addition of mangrove charcoal is very good for increasing the calorific value. Keywords: coal, sulfur, calorific value, proximate, Utimate Share Link | Plain Format | Corresponding Author (RAHMANIAR RAHMAN)

54	Renewable Energy	ABS-18
The influence of intrusion on change characteristic of coal in Mallawa Formation of South Sulawesi Province Anshariah1,4, AM Imran2, S Widodo3 and UR Irvan2 1Doctoral student of Earth and Environmental Technology, Faculty Engineering, Hasanuddin University, 90245, Indonesia. 2Geological Engineering Department, Faculty of Engineering, Hasanuddin University, 90245, Indonesia. 3Mining Engineering Department, Faculty of Engineering, Hasanuddin University, 90245, Indonesia. 4Mining Engineering Department, Faculty of Industrial Technology, Universitas Muslim Indonesia, 90231, Indonesia. Abstract Abstract. Coal that is deposited in the same depositional environment, age, and formation will usually have the same characteristics. However, the influence of geological conditions in an area can cause differences in the characteristics of coal in the same formation. This study aims to analyze geological factors that can affect differences in the characteristics of coal in the same depositional environment, age and formation. The study was conducted at three different locations, namely Mallawa District, Maros Regency- Lanne District, Pangkep Regency- and Massenrengpulu Region, Bone Regency. The coal sampling method in the study area uses the channel sampling method (ply by ply) which represents the bottom, middle and top coal seams. The results of the proximate analysis of coal in the Mallawa District Maros Regency showed an average moisture content of 7.78%, an average ash content of 39.99%, volatile matter 32.85%, and fixed carbon 19.39%. While in the area of Lanne District, Pangkep Regency shows an average moisture content of 9.65%, an average ash content of 40.41%, volatile matter 33.80%, and fixed carbon 16.16%. The results of proximate analysis in the Massenrengpulu area of Pangkep Regency showed an average moisture content of 3.86%, an average ash content of 23.16%, volatile matter 35.53%, and fixed carbon 37.46%. Coal from Mallawa and Lanne District has relatively the same characteristics, while the Massenrengpulu coal has lower moisture and ash content, and higher fixed carbon caused by the intrusion of igneous rocks in the area which causes the coal maturation process to be faster than the other two regions. Keywords: Coal, Mallawa, proximate, characteristics, intrusion Share Link | Plain Format | Corresponding Author (ANSHARIAH ANSHARIAH)

55	Renewable Energy	ABS-30
Utilization of calcium carbonate and carbide waste as an alternative cement substitute Lisa Febriani (1*), Desi Sandy (1*), Suryanti R. Tonapa (1*), Pebrinar R. Sangle (1*) 1) Program Studi Teknik Sipil, Universitas Kristen Indonesia Paulus Abstract PCC cement is the main ingredient in the process of making fresh concrete, which is also a non-renewable natural material. In the future, it is necessary to replace cement that is environmentally friendly. In this study, calcium carbonate and carbide waste will be used as a substitute for partial cement. Calcium carbonate (CC) and carbide waste (CW) used in this study will be combined, by setting calcium carbonate as the fixed variation and carbide waste as the free variation. The variation of calcium carbonate used is 12% and the variation of carbide waste used is 4%, 5% and 6%, all percentages are taken based on the weight of cement. From the results of the compressive strength test, there was an increase of 4.9% in the CC+4% CW samples, the flexural strength test showed an increase of 5.36% in the CC+4% CW samples and the split tensile strength test showed an increase of 3,03% for the CC+4% CW specimen, all of the CC+0% CW samples. Based on the results of this test, the use of calcium carbonate and carbide waste can be used as an alternative to cement substitute materials in making concrete. Keywords: calcium carbonate, carbide waste, environmentally friendly, PCC Share Link | Plain Format | Corresponding Author (Desi Sandy)

56	Renewable Energy	ABS-52
The Effect of Soil Chemical on the Productivity of Specific Cocoa in West Sulawesi Baja S 1) , Harli 2) L Asrul 3) , R Padjung4) , R. Neswati 5) 1,3,4,5 ) Hasanuddin University, Makassar 2) Al Asyariah Mandar University, West Sulawesi Abstract As one of the largest producing country of cocoa in the world, cocoa plays an important role in the Indonesian economy. Nevertheless, cocoa bean production has continued to decline since 2012 in several cocoa producer regions in Indonesia including West Sulawesi. The main problem for cocoa in Indonesia is the low productivity of the plant. The average productivity of cacao plants in West Sulawesi in 2019 was only 797 kg/ha/year. The productivity of the cocoa plant can reach 2,000-3,000 kg/ ha/year. One of the causes of the low productivity of the cocoa plant is the mismatch of soil chemical properties. The study uses quantitative methods with a deductive approach. This research took place in four districts in West Sulawesi, namely Polewali Mandar, Majene, Mamasa and Mamuju Regencies. The determination of the 30 point representative profiles was based on cocoa productivity data. The results showed that there was a correlation between CEC and cocoa productivity. The amount of exchangeable bases (Ca, Ma and K) has a significant effect on cocoa plants in the high productivity category. There is a negative correlation of salinity for cocoa plants in the high productivity category (1500-2500 kg / ha / year. Higher salinity causes lower productivity of cocoa plants. Likewise in the low productivity category (<800kg/ha/year). There is no correlation between pH H20 with cocoa productivity at all representative profile points There was a positive correlation between pH H2O and other soil chemical characteristics, namely C-Organic, salinity, base saturation and the number of bases can be exchanged Keywords: effect, chemical of soil, productivity, cocoa Share Link | Plain Format | Corresponding Author (Afrizal Surya Erlangga)

57	Renewable Energy	ABS-53
The Effect of Climate Characteristics for the Suitability of Land and Cacao Productivity in West Sulawesi L Asrul 1) , Harli 2) Baja S. 3) , R Padjung4) 1,3,4 ) Hasanuddin University, Makassar 2) Al Asyariah Mandar University, West Sulawesi Abstract Climate characteristics and land suitability are the important factors that influence the growth of cocoa which is the non irrigated plant. Changes in rainfall patterns and extreme climate events cause the high level of pest and disease attacks on cocoa plants, causing a decrease in production by 10-50 percent in the last three years. West Sulawesi is one of the cocoa production centers in Indonesia that experienced a decline in cocoa production since 2012. Currently, the productivity far below the optimum level which is only around 0.79 t/ha/year. This study aims to study the effect of specific climate characteristics of West Sulawesi on land suitability and its effect on cocoa productivity. This research was conducted in 4 districts in West Sulawesi, namely Polewali Mandar, Majene, Mamuju and Mamasa, using quantitative methods with a deductive approach. Quantitative analysis is used in determining the correlation between land characteristics climate and cacao production in each subdistrict. The results showed that there was a significant effect between annual rainfall and annual average temperature with cocoa productivity in West Sulawesi. The highest productivity was obtained in the total annual rainfall of more than 1,600 mm / year with an annual air temperature of 25.22 0C, maximum temperature of 28.630C. Humidity did not significantly affect the productivity of cocoa plants in West Sulawesi. The highest cocoa productivity was obtained at 83.03% humidity. Keywords: cocoa- climate- land suitability- productivity Share Link | Plain Format | Corresponding Author (Afrizal Surya Erlangga)

58	Renewable Energy	ABS-54
The role of family in the seaweed Kappaphycus alvarezii farming in Southeast (SE) Sulawesi La Ode M.Aslan1, Manat Rahim2, Wa Iba1, Andi Besse Patadjai3, St. Aida Adha Taridala4, Nur Isiyana Wianti5, Laode Asrul6 1Department of Aquaculture, Faculty of Fisheries and Marine Science, Halu Oleo University, Kendari 93232, Indonesia 2Department of Economics Science and Development Study, Faculty of Economics and Business, Halu Oleo University, Kendari 93232, Indonesia 3Department of Fish Processing technology, Faculty of of Fisheries and Marine Science, Halu Oleo University, Kendari 93232, Indonesia 4Department of Agribusiness, Faculty of Agriculture, Halu Oleo University, Kendari 93232, Indonesia 5Department of Agricultural Extension, Faculty of Agriculture, Halu Oleo University, Kendari 93232, Indonesia 6Department of Agrotechnology, Faculty of Agriculture, Hasanuddin University, Makassar 90245, Indonesia Abstract The seaweed, K. alvarezii, is the most dominant seaweed farmed in SE Sulawesi. Seaweed farming cover at least 11 activities, namely site preparation, tying seeds, planting seeds, cleaning cultivation ropes during maintenance, preventing pests, harvesting, releasing the harvested seaweed to the para-para (drying block), drying the harvested seaweed, releasing the dried seaweed into sacks, transport the dried seaweed into the house, and sell the harvest to the buyer. Until these days, there have not been many studies describing the roles and duties of family members (husband and wife) in supporting these farming activities. The purpose of this study was to describe the role of the family in cultivating seaweed activities in Southeast Sulawesi. This study was conducted in two districts in SE Sulawesi: Langere Village, Bonegunu sub-district, North Buton District (BU) and in Bungin Indah Village, Tinanggea District, South Konawe District (KS). This study used structured interviews with a total of 62 household respondents respondents involved in BU and 90 household respondents in KS. The respondents in BU were dominated by the Kulisusu ethnicity, while those in KS were dominated by the Bajo ethnicity. The results showed that in general, of the 11 cultivation activities, all cultivation activities in BU were dominated by husbands (100%) except for tying the seeds, which were all carried out by mothers (100%). Meanwhile, in KS, the roles of men (M) and women (W) or those in cooperation between the two parties (M-W) vary widely. Site preparation was dominated by M (91.92%) followed by M-W (6.06%) and 2.02% women- planting seedlings: M (94.95%) followed by M-W (5.05%)- cleaning the cultivation rope during maintenance of M (86.87%) followed by W (8.08%) and M-W (5.05%)- pest prevention: M 100%- harvesting: M (84.85%) followed by M-W (15.15%)- releasing the harvested seaweed: M(87.88%) followed by M-W(8.08%) and W ( 4.04%)- drying the harvested seaweed: W (44.44%) followed Keywords: family, seaweed, farming, Southeast Sulawesi Share Link | Plain Format | Corresponding Author (Andiny Putri Batara I.B.D)

59	Renewable Energy	ABS-55
Application of bokashi goat manure and organic liquid fertilizer to improve the growth and yield of lembah palu shallot variety Ansar M, Bahrudin, Fathurrahman, S Darman and A R Thaha Department of Agriculture Cultivation, Faculty of Agriculture, Tadulako University Abstract Abstract. The study aims to determine the effect of the application of solid organic fertilizers from bokashi goat manure (BGM) and liquid organic fertilizer (LOF) of cow urine to improve the growth and yield of ^lembah palu^ shallot varieties. The study was conducted on farmers^ land in Sidera Village Subdistrict Sigibiromaru Sigi Regency in Central Sulawesi. Research using Random Complete Block Design (RCBD) in factorials design (two-factor) with three replications. The first factor is the application of BGM, consists of 2 levels, namely: (1) without BGM and (2) BGM 30 t ha-1- The second factor is the concentration of LOF consists of 3 levels: (1) without the LOF, (2) LOF 16 L ha-1 and (3) LOF 32 L ha-1. The results of research showed that BGM 30 t.ha-1, followed by application of 16 L.ha-1 LOF produce shallot crop is higher, and the number of tuber per hill and the fresh weight of tuber per hectare of shallot ^lembah palu^ variety is higher compared with a combination of other treatments. BGM 30 t.ha-1 produced more leaf number and fresh weight of tubers per plant higher and significantly different without BGM. Application LOF 32 L.ha-1 produce of shallot leaves more than without LOF and LOF 16 L.ha-1. Keywords: organic fertilizer Share Link | Plain Format | Corresponding Author (Andiny Putri Batara I.B.D)

60	Renewable Energy	ABS-56
A Modification of Land Suitability Requirements for Maize in The Humid Tropics of South Sulawesi, Indonesia Risma Neswati, Christianto Lopulisa, Sumbangan Baja Department of Soil Science, Hasanuddin University, Makassar, Indonesia Abstract Evaluation of land suitability needs to be supported by site-specific approach including criteria of the land use type. One of the important food crops in the humid tropic of Indonesia is maize (Zea mays L.). The main aim of this study was to modification land suitability requirements for maize in the specific humid tropic of Indonesia. There were 3 representative districts in the South Sulawesi of Indonesia, consists of Jeneponto (dry zone,climate type E), East Luwu (wet zone, climate type A), and Bulukumba (relative dry, climate type D). There were 20 profiles in each district so that total of representative are 60 farmers and 60 profiles. This study used the deductive parametric approach on determine land suitability index, the determination of observation^s point was purposive sampling, data analysis was use Pearson correlation and linier regression analysis including on determination of interval value of land characteristics that have correlation and significant effect to maize yield. The result showed that land characteristics that have significant effect (p<0.01) to maize yield in the humid tropic of South Sulawesi were precipitation of growing cycle, soil pH, C-organic, and base saturation. The range values of land characteristics which classified as optimal (S1) for humid tropic region of Indonesia were precipitation of growth cycle (650-900 mm), soil pH (6.8-7.0), C-organic ( >2,2%), and base saturation (>62%), furthermore classified as marginal (S3) whether precipitation of growth cycle(<270 mm), C-organic (<1.15%), soil pH (<5.47 or >8.0), and base saturation (10-41%). Keywords: land suitability index, maize, humid tropic, parametric Share Link | Plain Format | Corresponding Author (A. Imam Utama)

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