Question

Explain the term physiological density.

Answer 1

Physiological Density refers to the number of people per unit area of arable (cultivable) land.

It measures how much pressure the population puts on the productive agricultural land.

Physiological Density = `"Total population"/"Arable Land Area"`

Importance:

• It gives a more accurate picture of resource pressure, especially in countries with limited farmland.
• High physiological density indicates potential stress on agricultural land and food production.
• Useful for agricultural planning, food security assessment, and sustainability studies.

Example:

• If a country has a high population but limited arable land, its physiological density will be very high, signalling overuse or strain on agricultural resources.
• In India, although the overall land area is vast, only a portion is cultivable, making the physiological density much higher than the arithmetic density.