The Delta in the state of Mississippi runs from the Gulf coast north to State Line Rd. on the southern edge of Memphis, Tennessee, and as far from the river as the flood plain extends. This entire region is extremely fertile.
Most of it seemed fertile, however, most will probably say the Mekong Delta. But that region is extremely wet (seemingly flooded).
The most fertile part of Egypt - see the link below.
The area of fertile soil at the mouth of a river is called river delta.
The Fertile Crescent is a crescent-shaped region that contains the moist and fertile land of Western Asia, the Nile Valley and Nile Delta of northeast Africa.
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I believe you are looking for the Nile Delta?
The most fertile soil is found around the Nile delta.
The Triangle which is an area of fertile farmland in Lower Egypt is called the Nile Delta.
A delta in this context is an especially fertile region caused by the collection of silts at a river mouth, where the river spreads so it is shallower but wider. Its name comes from the typical shape; a triangle, which represents the Greek letter delta.
The nile Delta
The area of fertile soil at the mouth of a river is called river delta.
The company was named Delta Air Services in 1928 (long before Delta winged aircraft). They were based in Monroe LA, and the name is probably linked to the Mississippi Delta region of LA.