Abstract
Understanding of soil forming factors is crucial to define physical, mineralogical and morphological properties of soils. In addition to that soil formations were highly associated with slope positions which have influence on pedogenetic and weathering process of the soils. Because, topography or relief affects how water and other material are added to and removed from soils. The aim of this study is to enhance our understanding of the role toposequence in controlling chemical weathering, influence on physical and mineralogical properties in soils developed on basaltic parent material under sub-humid terrestrial ecosystem in Black Sea region of Turkey using geochemical and mineralogical data obtained from X-ray diffraction and Scanning Electron Microscope analysis. For this purpose, four representative profiles formed on different topographic positions of transect were investigated and designated according to Soil Survey Staff (2014)/IUSS Working Group WRB (2015) classification systems. The results clearly showed that topography strongly affects soil physical, mineralogical and morphological characteristics either directly or indirectly in the local region even soils formed on the same parent material with the same climatic condition. This case was also explained with chemical weathering indices (Chemical Index of Alteration and Chemical Index of Weathering) in this study.
Highlights
IntroductionThe results clearly showed that topography strongly affects soil physical, mineralogical and morphological characteristics either directly or indirectly in the local region even soils formed on the same parent material with the same climatic condition
The purpose of this study is to further our understanding on the role toposequence on chemical weathering, along with its influence on physical and mineralogical properties in soils developed on basaltic parent material under sub humid terrestrial ecosystem in Black Sea region of Turkey using geochemical and mineralogical data obtained from X-ray diffraction (XRD) and Scanning Electron Microscope (SEM) analysis
Features of pedogenic evolution were tested that influence toposequence on physical, mineralogical properties and weathering rates derived from the geochemical in soils developed on basaltic parent material under sub-humid climate condition
Summary
The results clearly showed that topography strongly affects soil physical, mineralogical and morphological characteristics either directly or indirectly in the local region even soils formed on the same parent material with the same climatic condition This case was explained with chemical weathering indices (Chemical Index of Alteration and Chemical Index of Weathering) in this study. Mineral weathering, fundamental part of pedological evaluation, provides an essential role by transforming bedrock to weathered rock and to soil that supply nutrients to ecosystems (Berner et al 1983; White & Brantley 1995; Dixon et al 2009; Lybrand & Rasmussen 2018; Tunçay et al 2019) In this case, during weathering, the elements are leached and accumulated in different ways due to several pedogenic processes that influence different elements and produce different results. Numerous studies have been conducted on determination the extent of weathering process, soil formation (Munroe et al 2006; Anderson et al 2007; Zhang et al 2007; Brantley 2008)
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