Informations et ressources scientifiques
sur le développement des zones arides et semi-arides

Accueil du site → Doctorat → Egypte → MINERALOGICAL COMPOSITION OF CLAY AND SAND FRACTIONS OF SOME SOILS OF EGYPT AND ITS EFFECT ON SOME SOIL CHEMICAL PROPERTIES

Ain Shams University (2016)

MINERALOGICAL COMPOSITION OF CLAY AND SAND FRACTIONS OF SOME SOILS OF EGYPT AND ITS EFFECT ON SOME SOIL CHEMICAL PROPERTIES

MOHAMED, SAFAA ABD EL-BARRY ABD EL-KADER

Titre : MINERALOGICAL COMPOSITION OF CLAY AND SAND FRACTIONS OF SOME SOILS OF EGYPT AND ITS EFFECT ON SOME SOIL CHEMICAL PROPERTIES

Auteur : MOHAMED, SAFAA ABD EL-BARRY ABD EL-KADER.

Etablissement de soutenance : Ain Shams University

Grade : Doctor of Philosophy (PhD) in Agricultural Science 2017

Résumé
As mentioned earlier the purpose of this investigation is to study the mineralogical composition of the sand and clay fractions of some soils having different characteristics to reveal the effect or relation between clay mineralogy and some chemical characteristics i.e. cation exchange capacity (CEC). The different soils selected for this study were chosen from different areas have apparently different parent material or sediments. Five locations were selected i.e. Shalakan Farm, which located sudden Delta and formed essentially from Nile sediments, the second location is a private farm at El-Khatatba area at 84 kilo Cairo-Alexandria desert road, where vast sand sheets area where largest project of land reclamation for agricultural extension is carried out by mostly private sectors. The third site is at West Nubaria (Bunger El-Sokker area) where projects for reclaiming calcareous soils to represent cultivated calcareous soils. The forth is an area located at kilo 114 south Alexandria-Marsa Matruh desert road to represent the highly calcareous soils (deposits). The fifth is taken from the Northern part of Kafr El-Sheikh Governorate from cultivated and non-cultivated area object to the black sand deposit. A number of profiles and sites were taken from different locations to represent the different soils with a total number of 33 samples. The collected samples were air dried and prepared for different physical, chemical, mineralogical and spectral analyses. Physical analyses included color, mechanical analysis and saturation percentages, while chemical analyses included EC, pH, soluble cations and anions, OM, CaCO3 and free iron oxides. Mineralogical analyses included, separation of the fine sand and clay fractions, identification of fine sand mineralogical composition using the polarizing microscope, identification of minerals of the clay fraction subjecting the studied samples for the different pretreatments. The mineralogical studies also included determination of the cation exchange capacities of the clay samples before and after removal of different constituents such as free iron oxides, amorphous materials (SiO2+ Al2O3), and CaCO3. While the spectral study included measuring the spectral reflectance from all studied soil samples using FR-ASD FieldSpec3 spectroradiometer from spectral range between 350-2500 nm.

Présentation étendue (EULC)

Page publiée le 12 février 2019