Final answer:
Floodplains are fertile due to annual nutrient deposits from flooding rivers, impacting the soil's fertility. Inceptisols and Entisols found on floodplains may vary in fertility based on flooding patterns. Rivers contribute to fertile soils in regions like the Nile River and the Tigris-Euphrates basin.
Explanation:
Floodplains are known for their rich soil due to the annual deposit of nutrients from flooding rivers, making them fertile areas for agriculture. Inceptisols and Entisols, which are commonly found on floodplains, may exhibit fertility potential depending on the frequency and intensity of flooding. The interaction between rivers, sediment deposits, and human activities has historically led to the development of fertile soils in regions like the Nile River and the Tigris-Euphrates basin.
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