Judul: Pemetaan tingkat bahaya erosi sub das Bengawan Solo Hulu (Waduk Wonogiri
Abstrak: Tingkat Bahaya Erosi yang akan terjadi pada unit suatu lahan, dapat menentukan urutan prioritas Rencana Teknik Lapangan Rehabilitasi Lahan dan Konservasi Tanah (RTL RLKT). Tujuan dari penelitian ini adalah menduga - laju kehilangan tanah tiap grid, laju kehilangan tanah rata rata Sub DAS Bengawan Solo Hulu (Waduk Wonogiri), - Tingkat Bahaya Erosi rata rata Sub DAS Bengawan Solo - Hulu (Waduk Wonogiri), Menghitung prosentase masing masing Tingkat Erosi maupun Tingkat Bahaya Erosi, Menyajikan peta grid Laju Kehilangan tanah dan Tingkat Bahaya Erosi serta peta grid data penunjang. - Besarnya laju kehilangan tanah dihitung dengan metoda USLE sistem "grid method". Indek E130 diperoleh dari Peta Iso-eroden Bols. Erodibilitas tanah diperoleh dari Peta Tanah Tinjau. Informasi kemiringan lereng diperoleh dari Peta Lereng AGRARIA. Penggunaan lahan ditentukan dari Peta Penggunaan Tanah AGRARIA dengan 11 kategori penggunaan lahan. IPB Univ Kedalaman solum tanah berbeda beda untuk setiap - jenis tanah akibat proses pembentukan tanahnya...
Keyword: 

Judul: Aplikasi Sistem Informasi Geografis dalam Penentuan Tingkat Bahaya Erosi di Sub DAS Batanghari Hulu.
Abstrak: Watershed (DAS) Batanghari is a water catchment area which plays an important role in maintaining of ecosystem. Keputusan Kementerian Pekerjaan Umum (2012) states that forest degradation that occurs in the upstream Sub DAS. Prediction of erosion hazard was assessed using USLE with GIS software (ArcGIS 9.3 and ERDAS Imagine 9.1). The rate of erosion in the Sub DAS Batanghari Hulu calculated based on factors USLE erosion, i.e rain erosivity, soil erodibility, length and slope, land use and conservation actions. GIS analysis results showed that the rate of erosion in Sub DAS Batanghari Hulu is divided into five classes, i.e very light, mild, moderate, severe and very severeclass erosion. The Sub DAS Batanghari Hulu dominated by very mild class erosion, reaches 434 584.62 ha with a percentage of 34.80% of the total area. The Sub DAS Batanghari Hulu with very severe erosion hazard level has the smallest area, 64 430.04 ha, shows that most of the watershed area has a tolerable erosion value.
Keyword: erosion, gis, usle, watershed

Judul: Apatite Growth Optimation on Chicken Mucouse by Fourier Transform Infrared (FTIR) Characterization
Abstrak: Some experiment had been conducted to grow apatite from supersaturated solution of calcium phosphate ions on chicken mucouse. The calcium and phosphate ions were originated from Ca(NO3)2 and (NH4)2HPO4. Carbonate ions from (NH4)2CO3 was also used as starting solution. Experiment was carried out within about 5 hours at temperature 370 C and pH 7. Value of Ca+ : PO4 3- was 1.67, while molar ratio of CO3 2- : PO4 3- was 0.5 : 1. Molarity of molar ratio CO3 2- : PO4 3- variated approximately 0.15 : 0.30, 0.51 : 1.02, and 0.90 : 1.80. Mass of mucouse powder was constant 0.75 gram. The analysis result of Fourier Transform Infrared (FTIR) showed that the precipitation was apatite carbonate type A and B. In these experiment it was found out that the mucouse reduce the crystallinity of apatite precipitant, and the growth of apatite crystal was optimum at solution with molar ratio CO3 2- : PO4 3- about 0.15 : 0.30.
Keyword: