Judul: Comparison of Income and Marketing of Cooperative Farmers Partners and Non-Partners of Alif (Al-Ittifaq) Cooperative, Bandung Regency
Abstrak: Salah satu kendala yang dihadapi petani wortel di Desa Alamendah adalah rendahnya harga jual yang diterima petani. Petani mitra Koperasi Pesantren (Kopontren) Alif (Al-Ittifaq) yang terletak di Kecamatan Rancabali menyediakan saluran pemasaran ke supermarket-supermarket besar sehingga petani berpotensi menerima harga yang diterima yang lebih tinggi, tetapi masih ada petani wortel di sekitar wilayah koperasi yang tidak bermitra. Penelitian ini dilakukan untuk menganalisis perbedaan pendapatan petani mitra dan non-mitra dengan menggunakan analisis R/C ratio dan uji beda Independent Sample t-test serta perbedaan efisiensi pemasaran dengan analisis marjin pemasaran, farmer’s share, dan rasio keuntungan terhadap biaya. Hasil penelitian menunjukkan terdapat perbedaan rata-rata pendapatan atas biaya total antara petani mitra dan non-mitra. Dari saluran pemasaran yang terbentuk oleh pemasaran wortel yang dilakukan petani mitra dan non-mitra, saluran pemasaran yang paling efisien untuk petani adalah saluran pemasaran yang dilakukan oleh petani non-mitra, yaitu saluran pemasaran yang terdiri dari tengkulak, pedagang besar, dan pedagang pengecer., One of the obstacles faced by carrot farmers in Alamendah Village is the low selling price received by farmers. Alif Islamic Boarding School Cooperative (Kopontren) partner farmers (Al-Ittifaq) located in Rancabali District provide marketing channels to large supermarkets so that farmers have the potential to receive higher prices, but there are still carrot farmers around the cooperative area who are not partners. This research was conducted to analyze the differences in the income of partner farmers and non-partners by using R/C ratio analysis and Independent Sample t-test as well as differences in marketing efficiency using marketing margin analysis, farmer's share, and profit to cost ratio. The results showed that there were differences in the average income over total costs between partner and non-partner farmers. Of the marketing channels formed by the marketing of carrots by partner and non-partner farmers, the most efficient marketing channel for farmers is the marketing channel by non-partner farmers, namely marketing channels consisting of middlemen, wholesalers, and retailers.
Keyword: horticulture, carrot, farming

Judul: Income Analysis and Efficiency of Strawberry Farming in Alamendah Village, Rancabali Sub-district, Bandung Regency
Abstrak: Desa Alamendah merupakan salah satu produsen stroberi di wilayah Kabupaten Bandung. Akan tetapi, saat ini hasil produksi usahatani stroberi cenderung menurun. Penelitian ini bertujuan untuk 1) menganalisis pendapatan petani stroberi Desa Alamendah; 2) menganalisis faktor-faktor yang mempengaruhi tingkat produksi usahatani stroberi di Desa Alamendah; dan 3) menganalisis tingkat efisiensi penggunaan input pada usahatani stroberi. Metode yang akan digunakan pada penelitian ini adalah analisis pendapatan, analisis fungsi produksi CobbDouglas dan analisis efisiensi ekonomi. Hasil penelitian menunjukan bahwa usahatani stroberi di Desa Alamendah memberikan keuntungan secara ekonomi bagi petani. Hal ini ditunjukkan oleh nilai R/C atas biaya tunai adalah sebesar 2,36 dan nilai R/C atas biaya total adalah 1,16 maka usahatani stroberi layak untuk diusahakan. Faktor produksi yang berpengaruh positif dan signifikan terhadap produksi usahatani stroberi di Desa Alamendah adalah pupuk kandang dan pupuk daun. Akan tetapi penggunaan faktor produksi tersebut belum efisien karena nilai rasio NPM-BKM lebih dari satu sehingga penggunaannya perlu ditingkatkan., Alamendah Village is one of the strawberry producers in the Bandung Regency area. However, currently the production of strawberry farming tends to decline. This study aims to 1) analyze the income of Alamendah Village strawberry farmers; 2) analyze the factors that influence the production level of strawberry farming in Alamendah Village; and 3) analyze the level of efficiency of input use in strawberry farming. The methods to be used in this research are income analysis, Cobb-Douglas production function analysis and economic efficiency analysis. The results showed that strawberry farming in Alamendah Village provides economic benefits for farmers. This is indicated by the R/C value on cash costs is 2.36 and the R/C value on total costs is 1.16, so strawberry farming is feasible. Production factors that have a positive and significant effect on the production of strawberry farming in Alamendah Village are manure and leaf fertilizer. However, the use of these production factors is not yet efficient because the value of the NPM-BKM ratio is more than one so that their use needs to be increased.
Keyword: Cobb-Douglas, Faktor-faktor produksi, NPM/BKM, R/C ratio

Judul: Pembuatan Film Tipis Cu2ZnSnS4 sebagai Lapisan Penyerap Cahaya pada Sel Surya Menggunakan Metode Elektrodeposisi
Abstrak: Thin film of Cu2ZnSnS4 (CZTS) is an alternative semiconductor used as light absorber layer on solar cell. CZTS can replace silicon that commonly used as commercial semiconductor. The advantage of using CZTS as absorber layer is due to the abundance of its chemical composer on earth, and its high value of absorption coefficient. The absorber layer was made by using electrodeposition method on ITO glass substrates. The films were deposited at room temperature using potentiostatic mode with a potential of –1.05 V for 30, 45, and 60 minutes. After that, the films were annealed at two different temperatures, 180 ºC and 500 °C, for 45 minutes in N2/H2S atmosphere. Based on X-ray diffraction analysis, the polycrystalline thin film obtained fall into kesterite crystal phase. This type of crystal was obtained when the CZTS was annealed at 500 °C in H2S/N2 atmosphere. The value of optical band gap energy for the CZTS thin film was 2.2 eV with the film thickness about 1.228–6.366 μm. The sample of CZTS with electrodeposition time of 45 minutes and annealing temperature of 500 °C showed the best result and in conformity with absorber layers criteria for solar cells.
Keyword: semiconductor, ITO glass, CZTS thin film, electrodeposition