Question

population density is the number of humans living within an area. three measures of population density

arithmetic density
define:
how do you calculate arithmetic density?
think about it: if a country has a high measure, what does it mean?
think about it: if a country has a low measure, what does it mean?

physiological density
define arable land:
define:
how do you calculate physiological density?
think about it: if a country has a high measure, what does it mean?
think about it: if a country has a low measure, what does it mean?

agricultural density
define:
how do you calculate agricultural density?
think about it: if a country has a high measure, what does it mean?
think about it: if a country has a low measure, what does it mean?

Explanation:

• Arithmetic Density: It is the total population of a country divided by its total land area. Calculation formula: $\text{Arithmetic Density}=\frac{\text{Total Population}}{\text{Total Land Area}}$. A high measure means a large number of people per unit of land area, indicating population - crowdedness. A low measure means fewer people per unit of land area, suggesting more open - space.
• Arable Land: Land that is suitable for growing crops.
• Physiological Density: It is the total population of a country divided by the amount of arable land. Calculation formula: $\text{Physiological Density}=\frac{\text{Total Population}}{\text{Arable Land Area}}$. A high measure implies that there are a large number of people relying on a relatively small amount of arable land, which may pose challenges for food production. A low measure means more arable land per person, which is favorable for agriculture.
• Agricultural Density: It is the number of farmers divided by the amount of arable land. Calculation formula: $\text{Agricultural Density}=\frac{\text{Number of Farmers}}{\text{Arable Land Area}}$. A high measure indicates that there are many farmers working on a given amount of arable land, possibly suggesting less mechanization. A low measure means fewer farmers per unit of arable land, which may be associated with higher levels of agricultural technology and productivity.

Answer:

• Arithmetic Density: Total population divided by total land area. High measure means crowded population, low measure means sparse population.
• Arable Land: Land suitable for growing crops.
• Physiological Density: Total population divided by arable land area. High measure implies pressure on arable land for food - production, low measure means more arable land per person.
• Agricultural Density: Number of farmers divided by arable land area. High measure may suggest less mechanization, low measure may suggest higher agricultural productivity.