Pedological development of South El-Amiria soils using field morphology rating system.

The current study was used the field morphological rating scale for evaluating pedological development through determining the Relative Horizons Distinctness (RHD) and the Relative Profile Development (RPD) of soil . Some chemical and physical properties were used to evaluate the pedogenic factors as a result of being affected by process and factors of soil formation due to the distinct effect of climatologically environment. The RHD ratings were made by a comparison of adjacent horizons. Average of RHD ratings on the level of physiographic unit show that soils of windblown sand older than soils of lacustrine plains. The RPD ratings were made by a comparison of the C horizon to the horizons above it in the profile. The average RPD ratings of lacustrine plains under Aridisols order were less than windblown sand, which most area belong to Entisols order.. So, studies of pedological development need more attempts to include different features of the international soil development.