- Of all the major fertilizer nutrients, nitrogen is the main nutrient affecting soil pH, and soils can become more acidic or more alkaline depending on the type of nitrogen fertilizer used.
Some of the most important factors of social change are as under: Certain geographic changes sometimes produce great social change. Climate, storms, social erosion, earthquakes, floods, droughts etc., definitely affect social life and induce social change. Human life is closely bound up with the geographical conditions of the earth.
Accompanying these structural changes in the economy, major changes of social structure also occur: 1  The population expands rapidly as death rates fall in advance of birth rates. 2  The population living in urban areas changes from a small minority to a large majority.