The Black Soil!!
Sill
Silt is a fine-grained fertile soil deposited by water.
it was called silt
Fertile lands in Egypt are located in the delta and along the valley of the Nile.
The most fertile soil is found around the Nile delta.
The black fertile soil in Egypt is called "Kemet" or "black land." It gets its name from the annual flooding of the Nile River, which deposits nutrient-rich silt onto the land, making it ideal for agriculture.
Ukraine and Russia
nile river
The most fertile soil is located in the Nile river. when the Nile river flooded it left black soil behind.
The fine soil that was deposited at the mouth of a river in Egypt was called silt.
Biggest reason Egypt outlasted Mesopotamia was the Nile. The Nile's flooding kept Egypt's soil fertile. (and the fertile soil made Egypt a wealthy nation and good in international trade) And the Nile was easy to navigate.
because of the fertile soil of river nile and the fertile soil is black in colour