Several of the most densely populated territories in the world are city-states, microstates and urban dependencies. This is often expressed in hectares or acres: 65 acres or 26 hectares per farm in this case (a square mile has 640 acres and there are 0.4 hectares in an acre). The productivity of the land is also a factor in studying the physiological density of an area. First, let's make sure we know what we are talking about: Agricultural Population Density: The ratio of farmers (or farms) to arable land. Observations Concerning the Increase of Mankind, Peopling of Countries, etc. Agricultural density: The total rural population / area of arable land Residential density: The number of people living in an urban area / area of residential land Urban density: The number of people inhabiting an urban area / total area of urban land Ecological optimum: The density of population that can be supported by the natural resources Egypt, with 36,350 square kilometers of arable land has an agricultural population density of 864 farmers per sq. Unique characteristics and drivers impact an area's population density, along with general factors. It is important to know and be able to apply the concepts of population density, at every scale from local to global. Alison graduated from VA Tech with a B.S. Also called real density, arithmetic density does not take into account whether or not the land is rural, urban, or whether it is desert or frozen tundra. This is called the Allee effect after the scientist who identified it. Are you a teacher or administrator interested in boosting AP Human Geography student outcomes? Plus, get practice tests, quizzes, and personalized coaching to help you In 1971, Bangladeshi farms on average produced around 90 pounds of rice per acre. Get unlimited access to over 84,000 lessons. Arable describes land that is suitable for growing crops. Most counties, whether metro or nonmetro, contain a combination of urban and rural populations. Commonly this is calculated for a county, city, country, another territory or the entire world. Natural Increase Rate & Formula | What is Natural Increase Rate in Populations? Urbanized areas have been delineated using the same basic threshold (50,000 population) for each decennial census since 1950, but procedures for delineating the urban fringe are more liberal today. This gives an average of land farmed by each individual. More developed countries have lower agricultural density than less developed countries, since more developed countries have access to technological and financial advantages that allow more farmland to be worked by an Penn State University: Statistical Methods for Analysing the Spatial Dimension of Changes in Land Use and Farming Systems. Line Bar Map. Stated rather simply, population density is a measurement of the number of people in an area relative to its size. Population is an important topic in AP Human Geography and is heavily tested on the exam. Jessica has taught junior high history and college seminar courses. However, the US also has malnutrition and hunger. The area below the kernel density for the agricultural sector is equal to 0.45, showing that 45% of the world population relies on agriculture for its livelihood. The distribution of the agricultural population is located to the left of the non-agricultural distribution implying that households in the agricultural sector earn, on average, just 20% of the (average) income of their counterparts in You can have an area of high population density but is not considered overcrowded if the area has a high carrying capacity. All rights reserved. Departments of Energy and Agriculture all use population data from the There are numerous ways to measure population density. Let's continue with the example of Country A, above, where the average farm is 65 acres. This gives an average of land farmed by each individual. Nevertheless, it is easy to see that the US produces a massive food surplus, and why it is the largest food exporter in the world (and the second largest producer, after India). Agricultural export declined by about 11% from N302.2 billion in 2018 to N269.8 billion in 2019. There are three ways to measure population density: Arithmetic Density: basic calculation of total number of people living in a particular geographical area of land. Create and find flashcards in record time. Census. You will find a lower level of agricultural density in more developed countries, because they have access to better technology and money, which allows an individual to work more farmland. We said above a person can survive on 0.4 acres per year. - Definition & Explanation, The 21st Amendment: Definition, History & Court Cases, The Continental Congress: Definition & Purpose, The State History of Georgia: Facts & Timeline, Freedom from Self-Incrimination: Definition & Overview, Freedom from Unreasonable Search and Seizure: Definition & Amendment, Texas v. Johnson in 1989: Summary, Decision & Significance, The Establishment Clause: Definition & Cases, Working Scholars Bringing Tuition-Free College to the Community, Total Area of Food Producing Land (square miles), PhysiologicalPopulation Density (people per square mile of farmland), Agricultural Population Density (farms per square mile of farmland), Name and describe the three measures of population density. A complete enumeration of a population. With so many factors, it should be clear that we need to be very careful in making assumptions about relationships between farm size, arable land, and overall population. The key is to use a rural-urban definition that best fits the needs of a specific activity, recognizing that any simple dichotomy hides a complex rural-urban continuum, often with very gentle gradations from one level to the next. Estimates of population, employment, and income are available for them annually. This measure of density is useful, because it can give us a rough estimate of how many people an area of farmland can reasonably support. Text on this page is printable and can be used according to our Terms of Service. Mechanization and economies of scale have made it difficult for small farms to survive. The distribution of the agricultural population is located to the left of the non-agricultural distribution implying that households in the agricultural sector earn, on average, just 20% of the (average) income of their counterparts in Arithmetic density is a mathematical calculation that gives an average of the number of people living in a specific area, such as a square mile or square kilometer. Population density (people per sq. It doesn't take into account any of the quality or characteristics of the land in the area such as the amount of land available to produce food. Areas of demographic breakdown and study include, but are not limited to: The audio, illustrations, photos, and videos are credited beneath the media asset, except for promotional images, which generally link to another page that contains the media credit. Agricultural and physiological density calculations provide a more complete picture of what the area is like. Students will be able to design and create bar graphs to visualize and compare the density levels of a U.S. state with national levels. For the AP Human Geography Exam, it is also important to know how to calculate population density and the implications it has on society and the environment. Sign up to highlight and take notes. Agricultural density is found by dividing an area of farmland by the total population of farmers in the same area. Texas does have large cities such as the Dallas/Fort Worth Metroplex, Houston, Austin, and San Antonio, but there are vast areas of west Texas that are largely vacant. ''Arable'' land is another term for farmland suitable for producing food. The largest concentration of people in the Western Hemisphere live on the northeast coast of the United States and upward along the southeastern coastline of Canada. The country with the highest percentage of arable land is _______, at _______%. Last we come to agricultural density. This could make the country overpopulated at a density that would make other places underpopulated. Global Change Research Program, and the U.S. To find the agricultural density, divide the area of farmland by the population of farmers in that area, giving you an average of land worked by each farmer. The simple definition of population density is the number of persons per unit of land area. Her diverse expertise includes Science, Nutrition, Culinary Arts, Business Management, and Human Growth and Development. That population density can cause problems both with quality of life for the inhabitants and with the surrounding environment. Arithmetic Population Density. Which types of countries have a lower agricultural population density? Population density (people per sq. There are large areas of Florida that are not heavily populated, with a lot of green space. 19,378,102 47,126.4 = 411.2 people per square mile. While Florida does have fertile farmland, it's a densely populated state with a lot of water that doesn't support food production. Even if there is enough food available in the supermarket (and in the US, there always is), people might not be able to afford it, or they might not be able to get to the supermarket, or they might be only able to afford food with insufficient nutritional value, or any combination of these. You may also confuse population distribution (the pattern in which people live) with its density. One factor seen as a result of rapid population growth is that farm household size may outstrip the capacity of the farm to feed the people who live on it. However, data on human population density at the country level, and even at regional levels, may not be very informative; society tends to form clusters that can be surrounded by sparsely inhabited areas. Urban areas comprise larger places and densely settled areas around them. Human populations have moved and settled in a variety of locations over a long period of time. This is a sign that, compared to the US, the effort to produce food on their arable land is very great. Why do populations move to a new location? This measurement is often used to estimate how long a land and its resources can support its population. The amount of land needed to feed a person varies based on the quality of the land (e.g., soil), type of crops grown, access to nutrients, access to fertilizers, and other factors. Fig. The US has around 609,000 mi2 of arable land (you may see figures ranging from 300,000 to 1,400,000, which reflects different definitions of "arable land" to include grazing land, and whether only land productive in a given year is measured). This isn't the case everywhere, but it explains why the US's agricultural density is shrinking yearly. The AP Human Geography exam will test your knowledge of human population characteristics and the how population density is used to explain the relationship between people and the environment. The US has 2,084,000 farms, with 1,426,563 acres of farmland. The time when human beings first domesticated plants and animals and no longer relied solely on hunting and gathering. Outlying counties that are economically tied to the core counties as measured by labor-force commuting. Students will be able to calculate arithmetic (population), agricultural, and physiological densities at the state and national levels. The total number of people is divided by, for example, one kilometer, to determine the average density on that acre. Total Population Total Area of Farmland = Physiological Population Density The calculation helps determine how many people depend on an area of land for food. "Agriculture" here refers solely to crops and not to domestic animals, thus in this definition arable land does not include rangeland for animal grazing. Geographic Information Systems (GIS), Geography, Human Geography. Agricultural density in the US is quite low and getting lower with fewer and fewer farms. Create flashcards in notes completely automatically. In terms of household size, farm families topped eight in the early 1970s, and are now half that. To unlock this lesson you must be a Study.com Member. The table below compares the agricultural population density of Florida and Texas. 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