Judul: Analisis Produksi dan Pendapatan Usahatani Padi Sistem Subak (Kasus: Usahatani Padi Beras Merah Desa Jatiluwih, Kecamatan Penebel, Tabanan, Bali)
Abstrak: The increasing of rice consumption level in Indonesia with high population growth indicates the need for effort to increase the productivity of rice farm. Tabanan as the district that produced the most rice in Bali is mentioned by BPS (2012). Tabanan has 40 859 ha rice farm area with a total production of 210 762 ton of rice and productivity of 5.16 ton/ha. The purpose of this research are to analyze the characteristics and the factors that affecting the rice production rice farm at Jatiluwih, to analyze the income of rice farming at Jatiluwih. Production function analysis use Cobb Douglas production function model and the analysis of rice farm income earned by finding the gap between total revenue and total expenditure. Factors that affecting rice production in Jatiluwih are seed, fertilizer, urea, KCl, liquid pesticides, and labor. R/C ratio of the direct cost is 2.95 and R/C ratio of total cost is 2.43, which indicates that the revenue which is received by the farmer can cover the entire cost of farming
Keyword: Subak, rice, revenue, analysis of production

Judul: Analysis of Rice Farming Income and Technical Efficiency (Case Study of Warungkondang Sub-District, Cianjur Regency and Cibungbulang, Bogor Regency)
Abstrak: Kecamatan Warungkondang dan Cibungbulang memiliki potensi lahan yang luas untuk ditanami padi, namun produksi padi rendah. Peningkatan produksi padi menjadi hal yang sangat penting mengingat pertumbuhan penduduk meningkat setiap tahun sehingga kebutuhan terhadap padi sebagai sumber pangan meningkat. Jumlah produksi yang lebih banyak akan meningkatkan pendapatan petani. Produksi padi yang tinggi belum tentu menunjukkan proses produksi yang efisien. Penelitian ini memiliki tujuan untuk: (1) menganalisis pedapatan usahatani padi, (2) mengidentifikasi faktor-faktor yang memengaruhi produksi padi, dan (3) menganalisis efisiensi teknis usahatani padi di Kecamatan Warungkodang dan Cibungbulang. Pendapatan usahatani padi akan dianalisis menggunakan analisis penndapatan dan R/C Ratio. Faktor-faktor yang memengaruhi produksi padi akan dianalisis dengan analisis linear berganda. Efisiensi teknis usahatani padi akan dianaisis menggunakan Stochastic Frontier Analysis. Hasil penelitian menunjukkan bahwa R/C ratio petani Kecamatan Warungkondang dengan luas lahan sempit dan luas adalah 1,20 dan 1,30 dan petani padi Kecamatan Cibungbulang yang memiliki lahan sempit dan luas memiliki nilai R/C ratio adalah 1,10 dan 1,12. Pada kedua kecamatan faktor-faktor yang memengaruhi usahatani adalah jumlah benih dan tenaga kerja. Kecamatan Warungkondang dan Cibungbulang memiliki nilai efisiensi teknis sebesar 0,86 dan 0,65. Faktor inefisiensi Kecamatan Warungkondang adalah pendidikan petani dan pada Kecamatan Cibungbulang adalah pedidikan dan tanggungan keluarga., Warungkondang and Cibungbulang Sub-District have potentially spacious land to be planted by rice, however their rice production are low. Increasing rice production become important considering there’s increasing population every year. Efficient rice farmers will produce more rice than others who don’t efficient. That is why the purposes of this study are: (1) to analyze income of rice farming, (2) to identify the factors that influence the production of rice, (3) to analyze the technical efficiency of rice farming in Warungkondang and Cibungbulang Sub-District. The method for income analysis is R/C ratio. The factors that influence rice production will be analyzied with Ordinary Least Square. Technical efficiency will be analyzed with Stochastic Frontier Analysis. The results of this study showed that rice farmers of Warungkondang Sub-District with narrow land and wide land R/C ratio are 1,20 and 1,30 and rice farmers of Cibungbulang Sub-District with land narrow wide R/C ratio are 1,10 and 1,12. The factors that influence rice production in both SubDistrict are seed and labor. Warungkondang and Cibungbulang Sub-District efficiency values are 0,86 and 0,65. Factors that influence technical inefficiency in Warungkondang Sub-District are farmers’ education and for Cibungbulang SubDistrict are farmers’ education and family members.
Keyword: ordinary least square, productivity factors, inefficiency, R/C ratio, Stochastic Frontier Analysis

Judul: Hydroxyapatite-Chitosan Composite Coating on Stainless Steel 316 to Improve Corrosion Resistance
Abstrak: Metals that were used in bone implantation should have good corrosion resistance that were not easily corroded when implanted into the body. Metal corrosion resistance of stainless steel 316 can be enhanced through the metal coating by hydroxyapatite-chitosan composite with composition ratio of hydroxyapatite (gram) and chitosan 3% (mL) 0.2:0, 0.2:0.1, 0.2:0.5, 0.2:1.0, and 0.2:1.5. Besides improving the corrosion resistance of metal, the presence of chitosan also maintain the position of hydroxyapatite on metal surfaces. Corrosion resistance increases with increasing amount of chitosan added and the best composition of hydroxyapatite-chitosan composite was 0.2:1.0.
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