Soils of the Uludağ University campus area, their genesis and classification


Thesis Type: Postgraduate

Institution Of The Thesis: Uludağ Üniversitesi, Turkey

Approval Date: 2001

Thesis Language: Turkish

Student: GÖKHAN ÖZSOY

Supervisor: ERTUĞRUL AKSOY

Abstract:

in this research soil genesis of the Uludağ University campus arca soils have been investigated and classifîed according to Soil Taxonomy (1975 and 1999) and FAOYUnesco (1974 and 1990) classification systems. Most of the soils of the U.U. Campus area formed on neojen clay, lime deposits and the others formed on quatemary alluvium. In the research area 25 soil series, formed on 4 different physiographic units, were identified and sampled due to horizon base. 114 disturbed soil sample were taken for to investigate physical and Chemical properties of the soils at the laboratory. Problems related to salinity and alkalinity were not determined in the study area. The cation exchange capacity is very high, in the range of 4,83 to 65,02 me/lOOg soil. The base saturation pcrccntage is high often close to 100 percent with the Ca4^ and Mg++ accupying more than 90 percent of the exchange sites. The soil reaction varies from weakly acid to weakly alkaline and pH values changes between 6,20 and 7,94. The CaCC>3 equivalent increases with the depth varying from % 0,15 in the surface horizon of the Dikilitaş series to % 79,45 in the subsurface horizon of the Görükle series. Organic matter contents are generally low and decreases with the depth and varies between % 0,12 and 2,76. Due to the physical, Chemical and morphological properties, soil profiles were classifîed as Entisol, Inceptisol, Mollisol and Vertisol according to Soil Taxonomy (1975 and 1999) and in the units of Eutric Vertisol, Eutric Leptosol, Calcaric Regesol, Calcaric Fluvisol, Eutric Cambisol, Calcaric Cambisol and Calcaric Phaeozem according to FAO/Unesco (1974 and 1990) classification systems. The agricultural potential of the soils limited by the high clay content, steep slopes, shallowness and high CaCCh content of the subsurface horizon.