Judul: Impact of private land rehabilitation fund on income and regional economy in garut district
Abstrak: The District of Garut, West Java Province, had 69 115 hectares of unproductive and critical private lands in the year of 2006. The private land rehabilitation activitiy has been implemented every year eventhough its rehabilitation rate is even lower compared to the rate of such critical land formation. During the period of 1995-2004, about 4 200 hectares of critical lands had been formed every year. On the other side, the average of land rehabilitation financed by the government were only 2 500 to 3 500 hectares. Improvements on the process of provision and chanelling of government funds have been done in order to have an effective private land rehabilitation in accordance with the objectives.The farmer productivity improvements, provision of economic benefit to the owner of lands, and regional economy support are the private land rehabilitation objectives. This study was intended to answer the question: How to improve knowledg e and perception on private land rehabilitation program assisted by the government funds in order to have a change towards land productivity improvement a nd provide an optimal economic benefit to the owner of lands. The analysis tools for this study were Social Accounting Matrix, Structural Equation Model, and Benefit Cost Analysis.
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Judul: Analisis Ekonomi Sumberdaya Lahan Usahatani Padi Sawah untuk Mendukung Pertanian Pangan Berkelanjutan di Kabupaten Garut
Abstrak: The main objective of this research is to develop sustainable rice farming systems in Kabupaten Garut based on land capability. Each farming system has different input-output structures. The study showed that 57,91% of total paddy area was conducted on unsuitable land. Such a system needs higher inputs and influences the farmers’ income. The efficiency report showed different results based on the applied approach, either constant return to scale (CRS) or variable return to scale (VRS). The average efficiency score of rice farming systems using VRS approach was higher than using CRS approach for both land capabilities, i.e. 72-83%. This score range means that technically those farming systems had excess capacity between 17-28%. Land productivity change of rice farming system estimated by monetary valuation showed that on suitable land occurred appreciation, while on unsuitable one occurred depreciation. The result of feasibility analysis showed that the rice farming system on suitable land was feasible to be conducted, while on unsuitable one was unfeasible. The value of producer surplus of rice farming system on suitable land was higher than on unsuitable one. The result of optimization analysis showed that there were some areas in 7 sub-districts better not to produce rice since inefficient to be carried out, i.e. Kecamatan Kadungora, Pameungpeuk, Samarang, Banjarwangi, Cisewu, Talegong and Cikelet.
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Judul: Penentuan tembaga secara spektrofotometri sinar tampak sebagai senyawa kompleks asosiasi-ion dengan biru metilena melalui ekstraksi pelarut
Abstrak: Analisis tembaga menggunakan metode spektrofotometri sinar tampak dapat dilakukan berdasarkan kemampuan ion tembaga membentuk senyawa kompleks berwarna dengan beberapa zat pengompleks. Penelitian ini dilakukan untuk menentukan tembaga sebagai kompleks asosiasi-ion menggunakan ligan tiosulfat pada pembentukan ion kompleksnya. Pembentukan ion tiosulfato- kuprat(1-) dilakukan dengan mereaksikan tembaga (II) dengan tiosulfat. Kompleks yang terbentuk diekstraksi ke dalam diklorometana sebagai kompleks asosiasi-ion tiosulfatokuprat(1-) dengan biru metilena [MB,CuS2O3]. Kompleks asosiasi-ion [MB,CuS2O3] mempunyai panjang gelombang dengan serapan maksimum 644 nm. Kondisi optimum pengukuran yang dilakukan pada panjang gelombang tersebut adalah pH 3,24, konsentrasi tiosulfat 0,10 M, konsentrasi biru metilena 0,08 M, dan waktu ekstraksi 2 menit. Kompleks asosiasi-ion [MB,CuS2O3] stabil sampai hari ke-4. Metode penentuan tembaga ini mempunyai batas deteksi 4,973 × 105 M, sensitivitas metode 8,418 × 10° M, dan perolehan kembali sebesar 131,07%. Ion kalsium(II), magnesium(II), besi(II), dan aluminium(III) mengganggu proses pembentukan kompleks asosiasi-ion sedangkan ion zink(II) tidak mengganggu.
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