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Ari Ramayani
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Agriculture, Biological Sciences & Forestry Environmental Science

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KAJIAN SIFAT FISIKA EMPAT TANAH UTAMA DI SUMATERA BARAT Yulnafatmawita Yulnafatmawita; Asmar Asmar; Ari Ramayani
Jurnal Solum Vol 4, No 2 (2007): Jurnal SOLUM
Publisher : Jurusan Tanah Fakultas Pertanian Universitas Andalas

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (76.644 KB) | DOI: 10.25077/js.4.2.81-90.2007

Abstract

A research about soil physical study of four main soils found in West Sumatra was conducted in 2006.  The research was aimed to determine some soil physical properties of four soil which are mostly found in West Sumatra.  The four soil orders assessed were Ultisol from Agricultural Expreriment Station Limau Manis, Oxisol from Lubuk Minturun, Entisol from Tabing Kecamatan Koto Tangah Padang, dan Andisol from Bukik Gompong Kabupaten Solok.  The result showed that at the depth of 0-20 cm soil profile.  Ultisol and Oxisol had finer texture than those of Andisol and Entisol.  Andisol was dominated by silt while Entisol was dominated by sand particles.  Andisol had the lowest bulk density and the highest soil organic matter and total porosity.  Soil Organic matter content of Entisol, Oxisol, and Ultisols was low in criteria.  Plant available water (PAW) was higher in Oxisol, then followed by Andisol, Ultisol, and Entisol.Key words: Organic matter, bulk density, texture, porosity, plant available water
DETERMINASI ENERGI POTENSIAL AIR TANAH ULTISOL LIMAU MANIS DENGAN METODA KOLOM AIR, KERTAS SARING, DAN TEKANAN UDARA Asmar Asmar; Yulnafatmawita Yulnafatmawita; Ari Ramayani
Jurnal Solum Vol 3, No 2 (2006): Jurnal SOLUM
Publisher : Jurusan Tanah Fakultas Pertanian Universitas Andalas

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (49.921 KB) | DOI: 10.25077/js.3.2.59-64.2006

Abstract

Water content at several levels of soil water potential is important to determine soil water available for plant growth.  Standard method used to analyse soil water potential is by using Pressure and membrane Plate Apparatus.  Alternative methods can be used are by using Buchner Tunnel and Filter paper Methods.  This research was aimed to compare the results of Buchner Tunnel and Filter paper Methods on Pressure method in determining soil water potential.  The result showed that, from the two alternative methods tested, KA tanah determined by filter paper method gave results closer to the pressure method for Ultisol Limau Manis.  Then, among three laboratoriums giving services on soil water potential determination by using Pressure plate apparatus, laboratorium of soil physics from Jambi University gave results which were more rational to the soil physical properties of Ultisol Limau Manis.Key Words: Soil water potential, plant available water, Buchner tunnel, filter paper, pressure plate apparatus
Co-Authors Asmar Asmar Asmar Asmar Yulnafatmawita Yulnafatmawita