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Apong Sandrawati

Staff Pengajar Fakultas Pertanian UNPAD

Author-ID : 2603513

Agriculture, Biological Sciences & Forestry

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Pendugaan Tingkat Produktivitas Pertanian Lahan Kering dengan Metode Indeks Storie di Kecamatan Raya Kabupaten Simalungun Apong Sandrawati; Arion Eudia Saragih Garingging
Soilrens Vol 14, No 1 (2016)
Publisher : Fakultas Pertanian Universitas Padjadjaran

The aimed of this research was to find out the level of agricultural land productivity at Raya SimalungunSubdistrict with Storie Index Method. This research had been done since March–May 2014 at Raya Simalungun Subdistrict. Sampling spot was done at the certain agricultural landused, slope, and types of soil. Land use types consist of dry land agriculture and plantation. The slopes consisted of land with vary on declivity; 2-15%, 15-25%, 25-40% and >40%, meanwhile the soil’s types include Tropaquepts, Dystrandepts, Haplorthox, Tropudults, Hydrandepts. The result of agriculture land basedon several factors; dynamic factor of land such as drainage, erossion, pH, Electric Conductivity (EC) of soil layer, showed that the level of productivity of agricultural land in Raya Simalungun Subdistrict is Excellent Quality, Moderate, Poor and Very Poor. The most extensive land quality is at Grade 3 orMedium quality is amounted to 21,109.85 Ha or 88.65% of the area of dry land agriculture. Area of productive dry land agriculture in Raya Simalungun Subdistrict is 22,059.40 Ha or 92,63% and less productive land area is 1,754 Ha or 7.37 of area dry land agriculture. Key words: Productivity of agricultural land, storie index, texture, landuse, drainage, erossion, pH, Electric Conductivity (EC).

Pengaruh Kelas Kemiringan Lereng dan Penggunaan Lahan terhadap Sifat Fisik Tanah di Kawasan Penyangga Waduk Cirata Kecamatan Cipeundeuy Kabupaten Bandung Barat Apong Sandrawati; Ade Setiawan; Gilang Kesumah
Soilrens Vol 14, No 1 (2016)
Publisher : Fakultas Pertanian Universitas Padjadjaran

Waduk Cirata is one of impormant water reservoir in West Java. This reservoir was used for supporting power plants for Java and Bali’s area. It’s need more attention to keep the function continuity of Waduk Cirata. Greenbelt area was one of factor determinant for establishment of Waduk Cirata. Landuse change in greenbelt area is a great threat for greenbelt area sustainability, future more to establishment of Waduk Cirata. This research was aimed to study the effect of landuse and slope combination to physical property of soil. The research was conducted in greenbelt area of Waduk Cirata, located in Margalaksana and Nenggeleng Village, Cipeundeuy District, Bandung Barat. The independent variable was three landuse type and two class of slope, so that were six combination variable that repeated four times, so there was 24 land unit. This land unit determinedwith overlay tools in ArcGIs software. Statistical analysis used for determined the effect andrelationship between parameter. Based on analysis data, combination of landuse type and class of slope not influence bulk density, porosity, and permeability value. Rubber plantation with class of slope 8-15% has higher bulk density (1.24 g/cm3) and higher porosity (66.7 %), meanwhile, the higher of permeability (9.31cm/hour) found in cocoa plantation with class of slope 16-25%.Keywords: greenbelt area, landuse, class of slope, bulk density, porosity, permeability.

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