Question

8. Fill in the blanks:
1. River valleys are densely populated because they are suitable for
2. Land is used for different purposes like
and
3. Overirrigation leads to
and​

Answer 1

Answer:

1) River valleys are densely populated because they are suitable for Agriculture .

2) Land is used for different purposes like agriculture, forestry, mining, building houses, roads and setting up of industries .

3) Over-irrigation leads to and wastes time. Crop nitrogen needs, fertilizer costs, and nitrogen losses to groundwater also result from over-irrigation.