The statement that the soil in the Mahanadi Delta is less fertile is not entirely accurate. The Mahanadi Delta is a well-known agricultural region known for its fertile alluvial soil. The soil in this region is generally categorized as fertile and suitable for cultivation. Here's why the soil in the Mahanadi Delta is considered fertile:

1. Alluvial Soil: The Mahanadi Delta is formed by the deposition of sediments brought by the Mahanadi River and other smaller tributaries. These sediments are rich in nutrients and minerals, which make the soil fertile.

2. Clay and Silt Content: The soil in the Mahanadi Delta is characterized by a high content of clay and silt. These soil particles have a high capacity to hold water and nutrients, making them beneficial for agriculture.

3. Organic Matter: The Mahanadi Delta region receives a significant amount of rainfall and has a dense network of rivers and canals. These conditions support lush vegetation, which adds a substantial amount of organic matter to the soil. Organic matter improves soil fertility and provides essential nutrients for plant growth.

4. Balanced Nutrient Composition: The soil in the Mahanadi Delta has a well-balanced composition of essential nutrients, including nitrogen, phosphorus, potassium, and various micronutrients. This balanced nutrient profile allows for diverse agricultural production.

5. Irrigation Potential: The Mahanadi Delta has a well-developed irrigation system that allows farmers to control the water supply for their crops. This helps to maintain soil fertility and productivity, even during dry periods.

While the soil in the Mahanadi Delta is generally fertile, there may be specific areas or pockets where soil quality might be affected by factors like salinity, waterlogging, or erosion. However, these issues are localized and do not represent the overall soil quality of the entire delta region.