ABSTRAK Penelitian ini dilakukan pada bulan Agustus dan September 2013 di Sub-DAS Batang Kandis di distrik Koto Tangah Kota Padang dan juga di AMGIS (Sistem Informasi Manajemen Pertanian Geographic) Laboratory. Penelitian ini bertujuan untuk menghitung laju erosi dan menentukan tingkat bahaya erosi dan mengatur arahan konservasi tanah dan konservasi tanah untolerated untuk pengendalian erosi. Metode yang digunakan dalam penelitian ini adalah USLE (Universal Soil Loss Equation) dengan pendekatan Sistem Informasi Geografis. Berdasarkan hasil penelitian ini menunjukkan bahwa dari seluruh areal sub-DAS Batang Kandis daerah, diketahui bahwa kriteria tingkat bahaya erosi sangat tinggi adalah areal terkecil dengan luas 53,292 hektar , sekitar 0,97 % . Hal ini menunjukkan bahwa sebagian besar sub-DAS Batang Kandis memiliki nilai erosi yang masih bisa ditoleransi. Tingkat erosi terbesar di Sub-DAS Batang Kandis terjadi pada satuan lahan KCB sama dengan 1368.246 ton/ha/tahun. Dari hasil identifikasi berdasarkan arah rehabilitasi lahan dan konservasi tanah, maka diperoleh bahwa satuan lahan KCB dan KCL adalah prioritas utama sebagai daerah yang memerlukan tindakan konservasi . ABSTRACT Loss Equation) with Geographic Information System approach. Based on the results of this study showed that from the entire acreage of sub-watershed Batang Kandis area, it is known that the very high erosion hazard level criteria was the smallest acreage with an area of 53.292 hectares, approximately 0.97 % . This suggests that most of the sub-watershed Batang Kandis has erosion value that can still be tolerated. The greatest erosion rates in Sub-watershed Batang Kandis occur at KCB land units is equal to 1368.246 tonnes/ha/year. From the results of identification based on direction of land rehabilitation and soil conservation, then obtained that the land units KCB and KCL was the major priority as the areas which is need the conservation action. This study was conducted in August and September 2013 in the Sub-Watershed of Batang Kandis in the district Koto Tangah of Padang City and also in AMGIS (Agriculture Management Geographic Information System) Laboratory. This study was purposed to calculate the rate of erosion and determine the level of erosion hazard and arrange soil conservation referrals and the untolerated soil conservation for erosion control. The method used in this research is the USLE (Universal Soil

Background: Currently, great progress in the artificial propagation of commercially important   portunid crabs of the genus Portunus has been achieved, and various methods have been adopted in mass-scale hatchery activities. This study analyzed the biological testing of formulated diets with different dose supplementations of vitamin E for the broodstock of female blue swimming crabs, P. pelagicus (Linnaeus, 1758) Methods: Female crab samples were collected from the coastal region of Padang, West Sumatra. The method used in this study was completely randomized design, with four treatment regimens (n=5 crabs each) of dietary vitamin E (0, 300, 600, and 900 IU/kg formulated diets). Results: The results show that the supplementation of vitamin E in the formulated diet had a significant effect (P <0.05) on the absolute weight growth, carapace length and carapace width. Conclusions: Supplementation of vitamin E on in formulated diet causes broodstock blue swimming crab molting, with a percentage value of 40–80% on day 20 and 20% on day 30, with a 100% survival rate.

Kegiatan pengabdian kepada masyarakat ini dilakukan dengan tujuan untuk pemanfaatan limbah kangkung air, Ipomoea aquatica Forks, sebagai salah satu bahan baku (material row) pakan buatan alternatif  dan  meningkatkan pengetahuan serta keterampilan petani ikan (masyarakat) Kelurahan Koto Tangah dalam bidang usaha pembuatan pakan/pelet ikan di Sumatera Barat.  Metoda yang digunakan dalam kegiatan ini adalah  (1) Penyuluhan (ceramah), dan (2) Peragaan pembuatan tepung dari limbah kangkung air dan pembuatan  pelet/pakan ikan alternatif dengan campuran tepung kangkung air. Dari hasil kegiatan pengabdian yang telah dilakukan maka dapat diambil beberapa kesimpulan sebagai berikut:Pengetahuan dan keterampilan kelompok tani sawah laweh dan kelompok tani ikan batang kandis jaya di Desa Sungai Bangek, Kelurahan Balai Gadang, Kec. Koto Tangah Padang sebelum dilaksanakan kegiatan pengabdian IbM ini masih sangat rendah. Namun demikian  motivasi atau keinginan masyarakat kelompok tani mitra IbM untuk melakukan usaha budidaya atau pemeliharaan ikan sangat besar. Hal ini dapat dilihat dari keinginan masyarakat kelompok tani mitra IbM  untuk menguasai teknologi pembuatan pakan ikan dari hasil limbah kangkung  air sangat  tingg. Lebih jauh dari kegiatan pengabdian pada masyarakat ini dapat menambah pengetahuan dan keterampilan masyarakat dalam mencari pakan alternatif untuk pakan ikan sehingga kegiatan budidaya dapat berjalan dengan baik di kedua daerah mitra.

The calculation of crop productivity has now been facilitated by technological development using remote sensing technology or data generated by satellites. Determining the value of productivity using images will shorten the time and does not require much effort. A remote sensing model that connects satellite image reflectance data with rice plant parameters will be handy for monitoring biomass growth and predicting crop yields more quickly and efficiently. This study aimed to determine the regression equation to estimate the productivity of regional rice in Harau District, Lima Puluh Kota Regency. This study consisted of several stages: data collection, data processing, and calculation of rice productivity, NDVI regression analysis with rice productivity, and Nash-Sutcliffe Efficiency (NSE) test against the obtained equations. The regression equation obtained from the results of data analysis to estimate rice productivity in Harau District, Lima Puluh Kota Regency is y = - 82152x4 + 208465x3 - 197654x2 + 82986x - 13014, with an NSE value of 0.64 which is categorized as ‘sufficient’.Keywords: MODIS, NDVI, Rice, Remote sensing; Productivity

Agriculture traditionally still uses large areas of land with relatively large amounts of water. The application of solar energy is one of the uses of new and renewable energy. This research uses a 50 Wp photovoltaic cell, battery, solar charge controller, DC stepdown, DC pump and hydroponic frame. The stages of the research are the design of the tools, the calculation of the power required by the tools, the manufacture of the tools, the collection of data and the analysis of the data. The data collected is temperature, sunlight intensity, electric power, electrical energy, water discharge, and photovoltaic efficiency. The data were processed and analyzed in an exploratory manner. Based on the results of the research conducted, the lowest average temperature was 25.33 C and the highest was 33.70 C with the highest average light intensity of 920.26 w/m2 at 12.00 WIB. The relationship between temperature and light intensity with a value of R2 of 0.7594. The highest average electrical energy obtained by polycrystalline is 30.44Wh. The water lost from the hydroponic system is 0.03%. The efficiency of photovoltaic cells is 10.09%–15.72%.         Keywords:  DC pump, hydroponics, light intensity, photovoltaic