Judul: Pengelolaan pompa air untuk irigasi pertanian dalam mengembangkan usaha tani di Desa Singasari, Kecamatan Jonggol, Kabupaten Bogor, Jawa Barat
Abstrak: Masalah air masih merupakan masalah utama bagi sebagian besar petani di beberapa daerah tertentu. Pemenuhan kebutuhan air bagi tanaman mutlak dilakukan, sehingga sistem usaha tani berkelanjutan dapat dipertahankan. Para petani tidak bisa mengandalkan air hujan untuk pemenuhan kebutuhan air tanaman dikarenakan kondisi hujan yang tidak bisa diprediksi turunnya. Sebagai pengganti air hujan, dibutuhkan sumber air untuk pemenuhan kebutuhan air tanaman, antara lain dari sungai atau airtanah. Irigasi yang bisa digunakan untuk memanfaatkan sumber air tersebut adalah irigasi pompa. Namun saat ini, para petani masih beranggapan mahalnya biaya yang dikeluarkan dalam pemanfaatan irigas pompa. Oleh karena itu, dibutuhkan suatu penelitian khusus mengenai analisis ekonomi penggunaan pompa untuk irigasi. Tujuan penelitian ini adalah untuk mengetahui harga air dan menganalisis kondisi usaha tani di lokasi penelitian dengan adanya irigasi pompa.
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Judul: Kajian Penggunaan Pompa Irigasi untuk Pertanian di Desa Babakan Raden, Kecamatan Cariu, Kabupaten Bogor.
Abstrak: One of the main problems that occur in irrigation supply is the increasing water scarcity at certain times. Actually the water is still available in the basin, it's just necessary some efforts to supply the irrigation needs. Actually the water can be raised by using water pump. If agriculture only depends on surface water and rainfall, it will not be able to increase the productivity of land because the crop water requirement is not fulfilled in some periods. The purpose of this study are determining the irrigation water pricing and finding out profitable irrigated farming. Irrigation water requirement is calculated with CROPWAT 8.0 software by using climate and rainfall conditions as input parameters, and engineering economy is used to calculate irrigation water pricing. The result shows that existence of the pump for lifting up the water to agricultural land could help farmers in increasing cropping intensity and farmers income because the farmers could plant three times a year with cropping pattern rice-rice-secondary crops or rice-rice-vegetables. The most profitable cropping pattern is rice-rice-vegetable because vegetables income is the highest among secondary crops. For sustainable farming, irrigation water cost have to based on irrigation water pricing.
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Judul: Characterizations of low alloy steel sae 4422  plated with chromic acid (Cro3)
Abstrak: Characterizations of low alloy steel SAE 4422 plated with chromic acid (CrOrO3) was use Optical Microscopy (OM), Scanning Electron Microscopy (SEM), X-Ray Diffraction (XRD), RD),Energy Dispersive Analysis of X-Ray (EDAX), Hardness Test and Roughness Test. Microstructures analysis exhibits cracks and grain boundaries microcracks as a characteristics of chrome metal found at plating metal. Perlite and Ferrite as grains of steel found at base metal with grain boundaries around it. Phase analysis of plating metal appropriate to chrome metal with lattice constant (a) is 2.559 Å and phase analysis of base metal appropriate to iron ferrite with lattice constant (a) is 3.318 Å. Both plating and base metal have cubic system. Chemical analysis of plating metal at surface section exhibits that cracks area have highest value of carbon element compare with grains and grains boundaries area. While chemical analysis of base metal at cross section exhibits that perlite have highest value of carbon element compare with ferrite and grain boundaries. The hardness value of plating metal at surface section and cross section are 753 and 637 VHN. While, the hardness value of base metal and interface area at cross section are 205 and 373 VHN. The roughness value at measurement points of chrome surface for as received sample are 0.445 μm. Observation used Optical Microscopy and Scanning Electron Microscopy exhibits surface irregularities combine to form surface texture of plating metal at surface section.
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