Mohamed, Elsayed ， Belal, Abdel-Aziz ， Ali, R. R. ， Saleh, Ahmed ， Hendawy, Ehab A.
2019 SOILS OF EGYPT 2019 null(卷), null(期), (159-174页)
Soil degradation issue is one of the most important factors that threaten the crop production, thereby reflecting on food security. When discussing this issue, it must take into account the factors of surrounding, such as geographical location and climate in addition to social and economic conditions. This chapter illustrates the factors causing land degradation in Egypt as an example of semi-arid condition. It was noted that, under Egyptian conditions, there are many factors that differ from one place to another. Salinization, alkalinization and waterlogging are the most common factors in North Nile Delta. In addition, the rest of the Egyptian territories suffer from urban encroachment due to the high population density, where it was noted that the area located between the main branches of Nile Delta Rosetta and Damietta has lost 30510 acres during 1984-2014 where it is converted to urban areas. Finally, this chapter reviews the different methods used to assess land degradation using advanced techniques.