Document Type : Articles
Authors
Department of Soil Science and Water Resources , College of Agriculture, Tikrit University, Iraq
Abstract
Six soil pedons were selected, represented by the governorates of Salah al-Din and Najaf, distributed as three pedons for each governorate and located within a study path for each of them according to the geological formation, their physiographic location and the accompanying difference in sedimentation conditions resulting from the different sedimentation sources and the parent material. The results of the mineral examinations showed the predominance of light minerals for the very fine sand fraction in all horizons of the study pedon soils, and the evaporites were dominant in it, except for the exploited zarka region, which was characterized by the predominance of carbonate rocks. The results of the mineral analysis using the x- rays of the powder of the soil models, the absolute dominance of the minerals Quartz and Gypsum with different proportions and crystal sizes, respectively, in the surface and subsurface horizons of the Fursan pedon located within the soil of Salah al-Din with a relative rate of 51.53% and an average crystal size of 30.28 nm and a rate of 73.76% and an average size of 31.41 nm The surface and subsurface of pedon zirconia exploited for the pedons of Najaf, followed by Calcite, Feldspar, Dolomite and Aragonite in different proportion and sizes, in addition to the presence of other minerals such as rutile and various iron oxides such as Goethite and Hemetite.
Keywords
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