EFFECT OF SOIL DEVELOPMENT AND AGRICULTURAL LAND USE  STATUS ON THE FORMATION   AND OCCURRENCE NATURE OF INTERESTRATIFIED MINERALS IN SOME  IRAQI SOILS

	EFFECT OF SOIL DEVELOPMENT AND AGRICULTURAL LAND USE STATUS ON THE FORMATION AND OCCURRENCE NATURE OF INTERESTRATIFIED MINERALS IN SOME IRAQI SOILS
AL-TAQANI
Article 1, Volume 23, Issue 2, 2010, Pages 99-118
Abstract
This study was carried out to understand the nature of occurrence and formation of interstratified minerals regular and irregular in some Iraq soils , and their relation to the degree of development and land use . In this study. Eight soil sites, were chosen in different degree of development. soils were represented by four sites Sharazur , Bakhtiyary , Sami Al-Abid , and Um-Arzama . Whereas undeveloped soils were represented dy three sites Abu-Garib , Al-Samrah , and Al-Mahnnawiya ,finally,the middle state between developed and undeveloped soils was represented by Erbil Results of x-ray diffraction showed that the developed soils in rainy sites of Sharazur and Bakhtiariyary , were contended both types of interstratified minerals , regular and irregular type .also there are two stage for transformation of mica minerals : first, was primary stage ,.and second was critical stage. The present study confirmed that the developing state use the main effect on the transformation of mica minerals and formation of interstratified minerals in all developed soils comparning with undevelope soils, Result confirmed two type of mica edges weathering in developed soils : first was a complete edge weathering of mica , and second, was uncompeleted edge weathering, the morphological featueres of mica surfaces were not largely effected by nature and type of land using in all studied soils .

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