Understanding India's Population Growth Phases

India's population growth has gone through distinct phases over time. Studying these phases helps us understand the demographic changes the country has experienced. One significant phase is known as the period of population explosion, characterized by a rapid increase in population.

Identifying the Period of Population Explosion in India

The term 'population explosion' refers to a phase where the population grows at a very high rate. This typically happens when the death rate falls significantly while the birth rate remains high. In the context of India, different periods show varying rates of population growth:

• Period before 1921: Often referred to as a period of stagnant or stationary population. Growth was low due to high birth rates balanced by high death rates (due to poor health, sanitation, famines, etc.).
• Period from 1921 to 1951: This period saw a steady but moderate population growth. Death rates started declining due to improvements in health and sanitation, but birth rates remained relatively high. The year 1921 is sometimes referred to as the 'great divide' in India's demographic history.
• Period from 1951 to 1981: This is widely known as the period of population explosion in India. During these three decades, the population grew at a very rapid pace. This was primarily due to a sharp decline in the death rate (thanks to better healthcare, control of epidemic diseases, and improved living conditions) while the birth rate remained high. The average annual growth rate during this period was quite high.
• Period after 1981: While the population continued to grow, the growth rate started showing a declining trend, albeit gradually. Birth rates began to fall, though still higher than death rates, leading to continued population increase but at a slower pace compared to the 1951-1981 period.

Based on this analysis of India's demographic history, the period from 1951 to 1981 experienced the most rapid population growth, fitting the description of a 'population explosion'.

Therefore, the period 1951 - 1981 is correctly identified as the period of population explosion in India because of the significant gap between birth rates and death rates during this time, leading to accelerated population growth.

Revision Table: India Population Explosion Period

Additional Information: Factors Affecting Population Growth

Population growth is influenced by several factors, primarily:

• Birth Rate: The number of live births per thousand people in a year. High birth rates contribute to population increase.
• Death Rate: The number of deaths per thousand people in a year. Declining death rates (due to better health, nutrition, etc.) contribute to population increase if birth rates remain high.
• Migration: The movement of people into (immigration) or out of (emigration) a region. Net migration (immigration minus emigration) also affects the population size of a specific area.

The period of population explosion in India (1951-1981) was predominantly driven by the difference between birth rates and death rates within the country.