Judul: Evaluation of Regulations in Determining Suitable Areas for Chicken Farming Using Geographic Information System (Case Study in Singkawang West Kalimantan).
Abstrak: Singkawang, West Kalimantan, has the potential for developing chicken farming. Criteria for establishing chicken farming in Indonesia are regulated by a national regulation issued in 1982. The objective of this study was to evaluate the effectiveness of this regulation in determining suitable location for the development of broiler and layer farm in Singkawang. For comparison purposes, some process was carried out using similar regulation issued by the Australia Authority. Geographic Information System (GIS) equipped by spatial analysis with weighted overlay was used in the data processing. Pairwise comparison method was applied to obtain weight of each criterion base on expert judgment. The criteria used in this study were topography, environment, infrastructure, and social and poultry development plan. New formulation by combining criteria in the Indonesian and Australian regulation was introduced. The weight of theses criteria were adjusted accordingly by emphasizing some factor relevant namely water source, feed source and flood risk area The amount of land area suitable for the layer and broiler farm development in Singkawang was wider when applying criteria from Australia regulation than criteria from Indonesia regulation (96.10% or 56, 624 ha versus 70.66% or 43, 104 ha). Equal weighting of the criteria produced wider suitable area. Suitable area for chicken farming was 43,359.96 ha or 71.5 % when applying new formulation. It is concluded that the Indonesia regulation has not been effective to apply in Singkawang. Combining and adjusting the citeria of both regulations in the new formulation produced satisfy results in determining the suitable area.
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Judul: Determination of Agricultural Potential Area Based on Land Suitability and Revenue Cost Analysis. Case study in Bantul Regency, Yogyakarta
Abstrak: Nowadays, the population of the world is growing dramatically. Under present situations, where the land is a limiting factor, it is impossible to bring more area under cultivation (extensive farming), so farming community should tackle this challenge of producing more and more food with the available land only (intensive farming). Bantul regency which one of the food source in Yogyakarta has undergone rapidly tremendous economic growth during last few years. This condition caused the decreasing of agricultural areas to industrialized, tourism and settlement areas. The objective of this research is to explore the geographic information systems on defining potential agricultural area based on land suitability and revenue cost analysis in Bantul Regency. Land suitability analysis is a prerequisite for sustainable agricultural production. It involves evaluation of the criteria ranging from soil, terrain to socio-economic, market and infrastructure. Many of these factors are vaguely defined and characterized by their inherent vagueness. Multicriteria decisionmaking techniques like weighting, ranking, rating etc. are employed for suitability analysis. Simple Additive Weighting (SAW) or Weighted Linear Combination (WLC) is the most often used technique in multi-criteria decision making. As this process incorporates expert knowledge and judgment by decision makers at various levels, it is very much subjective in nature. Revenue cost analysis is needed in this research for determining agricultural potential area, in order to get the maximum benefit out of the land in the research area which had several land suitability level of several crops. The result of this research showed how land suitability and revenue cost analysis approach were very useful to determine the agricultural potential area in Bantul Regency. The agricultural potential area consists of potential area for corn, rice, soybean, and peanut.
Keyword: Agricultural Potential Area, Land Suitability, Revenue Cost Analysis, GIS

Judul: Katalis Zink Ferit Tersubstitusi Cu untuk Oksidasi Benzil Alkohol
Abstrak: Katalis berperan dalam menurunkan energi aktivasi. Katalis ZnFe2O4 dan ZnFe2O4 tersubstitusi Cu disintesis menggunakan metode kopresipitasi untuk digunakan dalam oksidasi benzil alkohol. Katalis dicirikan dengan spektrofotometer inframerah (FTIR) dan difraktometer sinar-X. Spektrum FTIR menunjukkan puncak serapan dari ikatan Zn-O dan Fe-O masing-masing pada rentang 559‒575 cm-1 dan 419‒447 cm-1. Difraktogram menunjukkan terbentuknya fase tunggal Zn0.6Cu0.4Fe2O4 pada katalis ZnFe2O4 tersubstitusi Cu 20%. Benzil alkohol dioksidasi dengan sistem refluks. Konversi benzil alkohol meningkat dengan meningkatnya suhu. Kadar benzaldehida yang dihasilkan dengan katalis ZnFe2O4 tersubstitusi Cu 20% lebih tinggi dibandingkan dengan katalis ZnFe2O4 yang tidak tersubstitusi dan yang tersubstitusi Cu 60 dan 80%. Hal tersebut menunjukkan bahwa katalis ZnFe2O4 tersubstitusi Cu 20% memiliki kinerja yang lebih baik dalam oksidasi benzil alkohol menjadi benzaldehida dengan kadar benzaldehida 8.763%.
Keyword: Benzil alkohol, katalis, oksidasi, ZnFe2O4