- 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.
From a large number of such individuals, Clark has devised a model of changes in social status. Within that model, there is a parameter, which he calls b, that is determined by the average speed of ascent or descent in social status among family members. It is these actual, concrete activities that make b what it is.