STUDY OF SOME PHYSICAL AND CHEMICAL CHARACTERISTICS IN RELATION TO TOPOGRAPHY FOR AL – HAMDANYIA REGION SOILS

	STUDY OF SOME PHYSICAL AND CHEMICAL CHARACTERISTICS IN RELATION TO TOPOGRAPHY FOR AL – HAMDANYIA REGION SOILS " NINAVA PROVINCE "
AL-TAQANI
Article 1, Volume 24, Issue 1, 2011, Pages 31-46
Abstract
The studied area is regarded as an important agricultural region . Different morphological topography as well as different degree and dirction of slope were observed in its . Transects consisted of five pedons represent the different topographic sites were chosing after detail surveying for this area The resalts shows that the texture of these soils is fine especially in the subsoil . The total and fine clay is increase with depth , this distribution is related to different activity in ersional and depositional processes at the surface horizons , whereas in the subsoil is attributed to parent material and formation of clay in situ as aresults if weathering and pedgenic processes . Also the lessivage process of clay contributed to enrichment of clay in some sites . The results reffered that high content of calcium carbonate were found in these soils , which increased with depth . For this the studied soils are classified acalcareous soils . These results are attributed to parent material which contain large amount of this compound and to the activity of decalcificaion and calcification processes . The active carbonate is found in high content and increased with depth ,this case which regarded as adevelopment pedogenic morphology and the different pedogenic morphological froms of calcite founds in these soils , are reflect the development degree . The organic matter found in low content in these soils and decreased with depth .

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STUDY OF SOME PHYSICAL AND CHEMICAL CHARACTERISTICS IN RELATION TO TOPOGRAPHY FOR AL – HAMDANYIA REGION SOILS " NINAVA PROVINCE "