Evaluasi Kelas Kesesuaian Lahan untuk Pengembangan Tanaman Semangka dan Blewah di Wilayah Kabupaten Belitung Timur

Evaluasi kesesuaian lahan adalah suatu proses penilaian sumber daya lahan untuk tujuan tertentu, salah satunya mengetahui tingkat kecocokan sebidang lahan untuk penggunaan tertentu. Hal ini sangat diperlukan agar produksi tanaman menjadi optimal dari segi kualitas dan kuantitasnya. Tujuan penelitian ini adalah : (1) menentukan kelas kesesuaian lahan untuk tanaman semangka dan tanaman blewah di Kabupaten Belitung Timur, (2) mengetahui faktor-faktor pembatas lahan untuk tanaman semangka dan tanaman blewah di Kabupaten Belitung Timur, (3) membuat perencanaan arahan pengembangan tanaman semangka dan tanaman blewah di Kabupaten Belitung Timur. Penelitian ini menggunakan metode survei dengan satuan titik sampel sebagai satuan analisis. Populasi penelitian yaitu lahan yang terdapat di wilayah Kabupaten Belitung Timur, pengambilan sampel tanah dengan teknik purposive sampling terdiri dari 35 titik sampel yang tersebar di wilayah Kabupaten Belitung Timur. Pengumpulan data dilakukan dengan observasi langsung, wawancara, dan analisis laboratorium. Teknik analisis data untuk mengetahui subkelas kesesuaian lahan adalah dengan sistem mencocokkan (matching) antara kualitas dan karakteristik lahan dengan persyaratan tumbuh tanaman semangka dan tanaman blewah. Subkelas kesesuaian lahan aktual kemudian diberi perlakuan sesuai faktor pembatasnya di setiap titik sampel dengan usaha perbaikan pada tingkat pengelolaan sedang, sehingga dihasilkan subkelas kesesuaian lahan potensial di setiap titik sampel. Berdasarkan hasil penelitian dapat disimpulkan sebagai berikut: (1) terdapat 10 subkelas kesesuaian lahan aktual tanaman semangka dan tanaman blewah yaitu subkelas kesesuaian lahan Noarc, Nrc, S3nr, S3nreh, S3nrna, S3nrnaeh, S3oarcneh, S3rcnreh, S3rcnrna, dan S3rcnrnaeh. Kesesuaian lahan potensial untuk tanaman semangka dan tanaman blewah dengan tingkat pengelolaan sedang dihasilkan 4 kelas kesesuaian lahan antara lain S1, S2, S3, dan N serta 5 subkelas kesesuaian lahan antara lain Noarc, Nrc, S2eh, S2rceh, S3rc. (2) pada kesesuaian lahan aktual terdapat kelas kesesuaian lahan dengan faktor pembatas antara lain ketersediaan oksigen (oa) yaitu drainase; media perakaran (rc) yaitu tekstur; retensi hara (nr) yaitu KTK, KB, pH, C-organik; hara tersedia (na) yaitu N-total, P-total, K-total; dan bahaya erosi (eh) yaitu bahaya erosi. Pada kesesuaian lahan potensial dengan tingkat pengelolaan sedang terdapat kelas kesesuaian lahan dengan faktor pembatas antara lain ketersediaan oksigen (oa) yaitu drainase; media perakaran (rc) yaitu tekstur; dan bahaya erosi (eh) yaitu bahaya erosi. (3) Berdasarkan hasil seleksi yang telah dilakukan terdapat 8 satuan lahan (SL) dengan 12 titik sampel yang sesuai untuk dapat diarahkan sebagai wilayah pengembangan tanaman semangka dan tanaman blewah antara lain yaitu titik dengan kode SP 09-27-1, DG 09-24-1, SP 11-27-1, DG 14-04-1, GT 16-17-2, GT 16-23-1, SR 16-20-1, SR 16-20-2, SR 18-19-1, MG 25-31-1, KK 31-18-1, dan KK 39-14-1

The Application Concentration Addition of Skim Milk to Soy Milk Kefir

Soy milk is a product processed soybean extract that resembles cow's milk. High protein content makes soy milk as highly nutritious vegetable milk. But the beany flavor of the resulting lead soy milk consumption levels are relatively low. One way of improving the quality of soy milk with a probiotic drink that process into soy milk kefir. The purpose of this study to determine the effect of the concentration of skim milk to soy milk kefir quality, namely in terms of the physical and chemical properties, microbiological and organoleptic. The study was conducted in two stages: determining the length of fermentation and then proceed with the manufacture of soy milk with the addition of different concentrations of skim milk of four treatments that control, the addition of skim milk concentration 0%, 4% and 8%. This research using completely randomized design (CRD). The result showed the addition of skim milk concentration effect on total of bacteria acid lactic (BAL), total yeast, colour, and flavor of soy milk kefir. The addition of skim milk concentration causes an increase in total BAL, total yeast and pH. For organoleptic show that the colour and flavor of soy milk kefir with a concentration of 8% skim milk is preferred compared with the three other treatments

Uneven Urban Metabolisms: Toward an Integrative (Ex)urban Political Ecology of Sustainability in and Around the City

Expanding cities present a sustainability challenge, as the uneven proliferation of hybrid landscape types becomes a major feature of 21st century urbanization. To fully address this challenge, scholars must consider the broad range of land uses that being produced beyond the urban core and how land use patterns in one location may be tied to patterns in other locations. Diverse threads within political ecology provide useful insights into the dynamics that produce uneven urbanization. Specifically, urban political ecology (UPE) details how economic power influences the development decision-making that proliferate urban forms, patterns of uneven access, and modes of decision-making, frequently viewing resource extraction and development through the urban metabolism lens. The political ecology of exurbia, or, perhaps, an exurban political ecology (ExPE), examines the symbolic role nature and the rural have played in conservation and development efforts that produce social, economic, and environmental conflicts. While UPE approaches tend to privilege macroscale dynamics, ExPE emphasizes the role of landowners, managers, and other actors in struggles over the production of exurban space, including through decision-making institutions and within the context of broader political economic forces. Three case studies illustrate the strengths and weaknesses of these approaches, demonstrating the benefits for and giving suggestions on how to integrate their insights into urban sustainability research. Integrated political ecology approaches demonstrate how political-economic processes at a variety of scales produce diverse local sustainability responses

MicroRNA Regulation of IGF-1

Stroke is the fourth leading cause of death worldwide. Low levels of IGF-1, a known neuroprotectant, correspond to aging and increased severity of stroke. We have previously demonstrated that there is an inverse relationship between the presence of anti-let7f or anti-miR-1 and levels of IGF-1. Further, the localization of let-7f was found to be within the microglial cell population. We hypothesize that let7f and miR-1 directly bind to the 3’ UTR region of IGF-1. Microglial cells (EOC-20) will be transfected with an IGF-1 clone with a luciferase tag. IGF-1 synthesis following treatment with antagomirs to either miR-1 or let7f will be tested by a luciferase assay