Analisis Finansial USAha Budidaya Tambak Sistem Tradisional Dan Silvofishery Di Area Restorasi Taman Nasional Sembilang Sumatera Selatan

Sistem Silvofishery diterapkan untuk meredam laju konversi illegal hutan mangrove menjadi tambak. Silvofishery diyakini mampu mengkombinasikan antara kepentingan konservasi mangrove dengan peningkatan kesejahteraan masyarakat sekitarnya. Penelitian ini bertujuan untuk menentukan analisis USAha dan kelayakan kriteria investasi USAha budidaya tambak tradisonal dan silvofishery bandeng di TNS Sumatera Selatan. Penelitian ini dilaksanakan pada bulan September-Oktober 2013. Metode yang digunakan metode survey dengan teknik kuisioner. Hasil analisis USAha budidaya tambak tradisional dan silvofishery bandeng mendapat keuntungan sebesar Rp. 5.187.370 dan Rp 5.921.000,00/tahun, nilai R/C sebesar 1,4 dan 1,5, nilai PP 4,7dan 4,0 dan nilai ROI sebesar 21% dan 25%. Analisis kelayakan USAha tambak tradisional dan silvofishery menunjukan nilai NPV>0, Net B/C≥1, dan IRR> discount rate, sehingga USAha budidaya tambak silvofishery bandeng mendapatkan keuntungan dan layak dilaksanakan untuk masa yang akan datan

Studi Etnofitomedika di Desa Lawang Agung Kecamatan Mulak Ulu Kabupaten Lahat Sumatera Selatan

Studi Etnofitomedika telah dilaksanakan pada bulan Mei-Desember 2004, bertempat di Suaka Margasatwa Isau-Isau Pasemah dan di Desa Lawang Agung, Kecamatan Mulak Ulu Kabupaten lahat. Identifikasi tumbuhan dilakukan di Laboratorium botani Jurusan Biologi FMIPA UNSRI. Penelitian ini bertujuan untuk menginventarisasi dan mengidentifikasi jenis-jenis tumbuhan yang digunakan sebagai obat tradisional digunakan oleh masyarakat Desa Lawang Agung. Dari hasil penelitian didapatkan 41 jenis tumbuhan obat yang tergolong kedalam 25 famili. 9 Tumbuhan obat etnis yang didapatkan terdiri dari 9 jenis yaitu: Anthocephalus cadamba Ml., Bischofia javanica Bl., Celosia argentea L., Eupatorium inofolium H.B.K., Leea indica Merr., Morus multicaulis Loud., Peronema canescens Jack., Schima wallichii (DC) Korth., dan Stachitarpeta jamaicensis (L.) Vahl., yang digunakan untuk obat demam, pembersih kewaniataan, obat kutil dan obat luka

Pengaruh Sistem Olah Tanah Dan Pemupukan Nitrogen Jangka Panjang Terhadap Efisiensi Serapan Nitrogen Pada Tanaman Padi Gogo (Oryza Sativa L.) Tahun Ke-27 Di Lahan Politeknik Negeri Lampung

Padi gogo merupakan tanaman pangan yang dibudidayakan di lahan kering. Salah satu upaya untuk meningkatkan efisiensi serapan nitrogen di lahan kering adalah dengan sistem olah tanah dan pemupukan nitrogen. Tujuan penelitian untuk mengetahui pengaruh sistem olah tanah dan pemupukan nitrogen jangka panjang terhadap efisiensi serapan nirogen pada tanaman padi gogo. Penelitian dilakukan di lahan Politeknik Negeri Lampung, dari bulan Oktober 2014 sampai dengan Maret 2015. Penelitian dilakukan dengan menggunakan Rancangan Acak Kelompok (RAK) yang disusun secara faktorial dengan 4 ulangan. Faktor pertama adalah sistem olah tanah jangka panjang yaitu T 1 = Olah Tanah Intensif (OTI), T 2 = Olah Tanah Minimum (OTM), T 3 = Tanpa Olah Tanah (TOT), dan faktor kedua adalah pemupukan nitrogen jangka panjang yaitu N o = 0 kg N ha -1 , N 1 = 50 kg N ha -1 , dan N 2 = 100 kg N ha -1 . Analisis tanah dan tanaman dilakukan di Laboratorium Ilmu Tanah Jurusan Agroteknologi dan Laboratoium Pengelolaan Limbah Agroindustri Jurusan Teknologi Hasil Pertanian, Fakultas Pertanian, Universitas Lampung, Bandar Lampung. Data yang diperoleh diuji homogenitasnya dengan uji Barlet dan adifitasnya dengan uji Tukey serta diolah dengan analisis ragam dan dilanjutkan dengan uji Beda Nyata Jujur (BNJ) pada taraf 5%. Hasil penelitian menunjukkan bahwa efisiensi serapan nitrogen antara sistem olah tanah OTM, TOT, dan OTI tidak berbeda nyata, dengan rerata mencapai 20,42%, 22,15%, dan 27,26%; efisiensi serapan nitrogen antara pemupukan nitrogen dosis 50 kg N ha -1 dan 100 kg N ha -1 tidak berbeda nyata, dengan rerata mencapai 20,07% dan 26,49%; dan tidak terdapat pengaruh interaksi antara sistem olah tanah dan pemupukan nitrogen jangka panjang terhadap efisiensi serapan nitrogen

The influence of multispectral scanner spatial resolution on forest feature classification

Inappropriate spatial resolution and corresponding data processing techniques may be major causes for non-optimal forest classification results frequently achieved from multispectral scanner (MSS) data. Procedures and results of empirical investigations are studied to determine the influence of MSS spatial resolution on the classification of forest features into levels of detail or hierarchies of information that might be appropriate for nationwide forest surveys and detailed in-place inventories. Two somewhat different, but related studies are presented. The first consisted of establishing classification accuracies for several hierarchies of features as spatial resolution was progressively coarsened from (2 meters) squared to (64 meters) squared. The second investigated the capabilities for specialized processing techniques to improve upon the results of conventional processing procedures for both coarse and fine resolution data

Critical Comparison of Assessment Codes for Steel Moment Resisting Frames

Many existing steel multi-storey frame buildings worldwide were designed prior to the introduction of modern seismic design provisions or based on outdated hazard maps considering low values of seismic intensity. This often resulted in buildings showing low performances with respect to earthquake loads. Assessment codes, such as the Eurocode 8 Part 3 and the ASCE 41, have been conceived to provide tools to assess the seismic performance of existing structures, to evaluate their adequacy with respect to the current safety standards and the need for seismic retrofit. However, recent research studies have revealed the necessity for a revision of these codes. In particular, for steel moment resisting frames, the current European regulation shares many similarities with older versions of the American codes, but has failed to incorporate changes based on the state-of-the-art knowledge. In addition, the undergoing update of other parts of the Eurocode motivates a full revision of the current standards. This paper compares the assessment procedures of the European and American codes. Two low-code steel Moment Resisting Frames were considered for case study purposes and the assessment was performed based on three local Engineering Demand Parameters (EDPs), i.e., column’s rotation, beam’s rotation and panel zone’s shear distortion, and the inter-story drift as global EDP. Incremental Dynamic Analyses were performed for the development of component and system fragility curves. The present work aims to identify some challenges and to provide some preliminary insights for the revision of the Eurocode 8 Part 3

Caldera unrest driven by CO2-induced drying of the deep hydrothermal system

Interpreting volcanic unrest is a highly challenging and non-unique problem at calderas, since large hydrothermal systems may either hide or amplify the dynamics of buried magma(s). Here we use the exceptional ground displacement and geochemical datasets from the actively degassing Campi Flegrei caldera (Southern Italy) to show that ambiguities disappear when the thermal evolution of the deep hydrothermal system is accurately tracked. By using temperatures from the CO2-CH4 exchange of 13C and thermodynamic analysis of gas ascending in the crust, we demonstrate that after the last 1982-84 crisis the deep hydrothermal system evolved through supercritical conditions under the continuous isenthalpic inflow of hot CO2-rich gases released from the deep (~8 km) magma reservoir of regional size. This resulted in the drying of the base of the hot hydrothermal system, no more buffered along the liquid-vapour equilibrium, and excludes any shallow arrival of new magma, whose abundant steam degassing due to decompression would have restored liquid-vapour equilibrium. The consequent CO2-infiltration and progressive heating of the surrounding deforming rock volume cause the build-up of pore pressure in aquifers, and generate the striking temporal symmetry that characterizes the ongoing uplift and the post-1984 subsidence, both originated by the same but reversed deformation mechanism

Economic evaluation of crop acreage estimation by multispectral remote sensing

The author has identified the following significant results. Photointerpretation of S190A and S190B imagery showed significantly better resolution with the S190B system. A small tendancy to underestimate acreage was observed. This averaged 6 percent and varied with field size. The S190B system had adequate resolution for acreage measurement but the color film did not provide adequate contrast to allow detailed classification of ground cover from imagery of a single date. In total 78 percent of the fields were correctly classified but with 56 percent correct for the major crop, corn

Variability of morphological descriptors in Sicilian oat (Avena sativa L.) populations

Due to its rusticity and feasibility of use, oat (Avena sativa L.) represents a crucial agronomic and economic resource for many semiarid environments. Presently, the recourse to new commercial varieties has caused a dramatic lowering of areas covered with the traditional local genotypes, and a severe risk of genetic erosion is emerging. To deepen the knowledge about the autochthonous oat populations, an activity of collection and cataloging across semiarid cropping areas was carried out. Sixteen oat populations were collected from different areas of Sicily and put in a field study for two consecutive years (2014 and 2015) in the experimental farm “Sparacia” (Cammarata, Italy). In both years and all populations, 21 morphological characters, related to different aspects of the whole plant or plant parts, were measured as described in the guidelines Community Plant Variety Office—Office Communautaire des Varietes Vegetales (CPVO-OCVV) (rif. CPVO-TP/020/2). Multivariate analysis (MA) was applied to assess the similarity/dissimilarity level among populations, also evaluating the relative discriminatory importance of each selected plant character. Although a strong variability between years did not allow perfect discrimination among genotypes, an association between oat groups emerged based on their prevalent utilization form. Among categorical characters, measurements on glumes and grain provided the best characterization of the populations in both years