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The aim of this study was to determine the physical, chemical characteristics and stage of decomposition in two peat profiles developed different soil formation conditions in arid small catchments in the middle Anatolia region of Turkey. The degree of physical (fiber content) and chemical [Sodium Pyrophosphate Extract Color, (SPEC)] decomposition was used to classify organic soils and subsequently establish map units. The physical and chemical properties of the soils were determined taking 9 samples from 2 organic soils profiles from throughout the Karasaz region. The analysis results of these samples showed that these soils were hemic. Physical decomposition of fibers was in the hemic range, but SPEC was sapric. Organic matter content of the second profile was higher because of the ground water level and fluctuation in the second profile. The second profile had a higher Humic Acid (HA) than the first profile throughout the soil profile (mean 36.9% at the first profile and mean 55.6% at the second profile). Fulvic Acid (FA) and humin contents were same in the both soil profiles except subsurface horizons of the second profile. Morphological, physical and chemical characteristics such as color, SPEC values, fiber contents, humin contents, HA and FA suggested that the second profile was classified as Hydric Medihemists due to a layer of water within the control section below the surface tier while the first profile was Sapric Medihemists. © 2006 Asian Network for Scientific Information. |
