Judul: Analysis Farming Income and Factors Affecting Production Rice in the Kecamatan Grabag
Abstrak: Kecamatan Grabag merupakan salah satu sentra produksi padi di Kabupaten Purworejo yang memiliki potensi lahan pertanian yang tinggi khususnya untuk pengembangan tanaman padi. Produksi padi yang dihasilkan relatif meningkat dengan luas lahan panen yang turun. Produksi yang tinggi belum tentu menjamin tingginya pendapatan yang diterima petani. Produktivitas padi yang dihasilkan di Kecamatan Grabag belum mencapai produktivitas yang optimal, produktivitas padi yang dihasilkan masih dapat ditingkatkan dengan penggunaan faktor produksi yang efektif dan efisien supaya dapat mencapai produktivitas optimal yang akan berpengaruh tehadap pendapatan petani. Tujuan penelitian ini untuk menganalisis seberapa besar pendapatan petani padi di Kecamatan Grabag dan menganalisis faktor-faktor apa saja yang memengaruhi produksi padi di Kecamatan Grabag. Metode analisis yang digunakan yaitu analisis deskriptif, analisis pendapatan usahatani dan R/C rasio, serta analisis fungsi produksi Cobb-Douglas. Hasil analisis pendapatan usahatani padi menunjukkan bahwa usahatani padi di Kecamatan Grabag dari ketiga jenis kepemilikan lahan menguntungkan secara finansial dan ekonomi. Hal ini menunjukkan pendapatan yang diperoleh petani dapat menutupi seluruh biaya usahatani. Pendapatan paling besar diterima oleh petani dengan lahan milik sendiri. Hasil regresi menunjukkan variabel luas lahan, benih, SP-36, TKDK, TKLK dan pengalaman berusahatani berpengaruh secara nyata terhadap produksi padi. Produksi padi di Kecamatan Grabag masih dapat ditingkatkan dengan peningkatan faktor produksi yang berpengaruh nyata terhadap produksi padi. Produksi padi yang meningkat diharapkan dapat memengaruhi pendapatan petani di Kecamatan Grabag. Kata Kunci : Cobb-Douglas, padi sawah, R/C rasio, usahatani padi, The data shrows that the rice production in Kecamatan Grabag, as one of the rice production center in Kabupaten Purworejo, tend to increase though the land area is decreasing overtime. The productivity of rice produced in Grabag District has not yet reached optimal productivity, the productivity of rice produced can still be increased by using effective and efficient production factors in order to achieve optimal productivity which will affect farmers' income. On the other hand, the high production doesn’t necessarily mean that the farmer’s income will increase. Therefore the aims of this study were to analyze the rice farmer’s income and to analysis the determining factors of rice production in the Kecamatan Grabag. The analytical methods used are descriptive analysis, farm income analysis and R/C ratio, and Cobb-Douglas production function analysis. The income analysis reveals that the rice farming in Kecamatan Grabag from the three types of land ownership is financially and economically profitable. This shows that the income earned by farmers can cover all farming costs. The largest income is received by farmers with their own land. While the regression analysis shows that the land area, seed, SP-36, TKDK, TKLK, and farming experience significantly affect the rice production.This study confirmed that the rice productiocn in Kecamatan Grabag can still be improved by increasing the significant production factors and hopefully will affect the farmer’s income in the Kecamatan Grabag Keywords: Cobb-Douglas, lowland rice, R/C ratio, rice farming
Keyword: Cobb-Douglas, padi sawah, R/C rasio, usahatani padi

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: 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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