Human Geography 101: Economic Geography - Agricultural Geography Subsistence vs. Commercial Farming Von Thünen Model Green Revolution

What This Is

Agricultural geography explores how people interact with the land to produce food and other essential resources. Understanding agricultural geography is crucial for grasping the complex relationships between human populations, economic systems, and environmental conditions. For instance, the Green Revolution, a period of rapid agricultural growth in the mid-20th century, transformed the way people produce and consume food, leading to increased global food security and economic development.

Key Models, Theories & Terms

• Von Thünen's Model of Agricultural Land Use: A model that explains how agricultural land is used in relation to transportation costs, with different crops grown in concentric rings around a city. For example, dairy farming is typically located closest to the city due to the need for frequent transportation of milk.
• Subsistence vs Commercial Farming: Subsistence farming is a type of agriculture where farmers produce food primarily for their own consumption, whereas commercial farming is focused on producing crops for sale in the market. The shift from subsistence to commercial farming is a key aspect of economic development.
• Green Revolution: A period of rapid agricultural growth in the mid-20th century, characterized by the introduction of high-yielding crop varieties, irrigation, and fertilizers. The Green Revolution transformed the way people produce and consume food, leading to increased global food security and economic development.
• Agricultural Intensification: The process of increasing agricultural productivity through the use of technology, such as irrigation and fertilizers, as well as changes in farming practices. Agricultural intensification has been a key driver of economic development in many countries.
• Agricultural Extensification: The process of expanding agricultural land use into new areas, often through the clearing of forests or other natural habitats. Agricultural extensification can have negative environmental impacts, such as deforestation and soil erosion.
• Food Security: The availability of sufficient, safe, and nutritious food to meet the dietary needs of a population. Food security is a critical aspect of human well-being and economic development.
• Food System: The network of activities, processes, and relationships involved in producing, processing, distributing, and consuming food. Understanding food systems is essential for addressing issues related to food security and sustainability.
• Agroecology: A holistic approach to agriculture that emphasizes the importance of ecological interactions and biodiversity in agricultural systems. Agroecology seeks to promote sustainable and resilient agricultural practices.

Step-by-Step Application

1. Identify the type of agriculture: Determine whether a region is engaged in subsistence or commercial farming, and how this affects the local economy and environment.
2. Analyze transportation costs: Use Von Thünen's Model to understand how transportation costs influence the location of different crops and agricultural activities.
3. Examine the impact of the Green Revolution: Consider how the Green Revolution has transformed agricultural practices and food systems in different regions, and what implications this has for food security and economic development.
4. Assess agricultural intensification and extensification: Evaluate the effects of agricultural intensification and extensification on local ecosystems and communities, and consider the trade-offs between increased productivity and environmental degradation.
5. Map food systems: Visualize the network of activities and relationships involved in producing, processing, distributing, and consuming food in a particular region or country.

Common Misconceptions

• Misconception: "All agricultural systems are sustainable."
• Correction: Agricultural systems can have significant environmental impacts, such as deforestation, soil erosion, and water pollution. Sustainable agricultural practices are essential for promoting long-term food security and environmental health.
• Misconception: "The Green Revolution only benefited wealthy farmers."
• Correction: While the Green Revolution did benefit some wealthy farmers, it also improved food security and economic development for many small-scale farmers and rural communities.
• Misconception: "Agricultural extensification is always a bad thing."
• Correction: While agricultural extensification can have negative environmental impacts, it can also provide opportunities for economic development and poverty reduction in some contexts.

AP Exam / Free-Response Tips

• FRQ task verbs: Identify, describe, explain, compare, and evaluate are common task verbs in AP Human Geography FRQs. Make sure to use these verbs accurately and effectively in your responses.
• Integrate models into essays: Use models and theories, such as Von Thünen's Model and the Green Revolution, to explain and analyze complex geographical phenomena.
• Distinguish between related concepts: Be able to distinguish between related concepts, such as subsistence and commercial farming, and agricultural intensification and extensification.

Quick Practice Scenario

A megacity in a developing country grows rapidly as rural residents move in for factory jobs. Identify the dominant migration pattern and one likely urban model that describes its structure.

Answer: The dominant migration pattern is likely circular migration, where rural residents move to the city for work and then return to their rural homes. One likely urban model that describes its structure is the Burgess concentric zone model, which predicts that cities will grow in a series of concentric zones, with high-density residential areas near the city center and lower-density areas in the suburbs.

Last-Minute Cram Sheet

• Von Thünen's Model: A model that explains how agricultural land is used in relation to transportation costs.
• Subsistence vs Commercial Farming: Subsistence farming is focused on producing food for local consumption, while commercial farming is focused on producing crops for sale in the market.
• Green Revolution: A period of rapid agricultural growth in the mid-20th century, characterized by the introduction of high-yielding crop varieties, irrigation, and fertilizers.
• Agricultural Intensification: The process of increasing agricultural productivity through the use of technology and changes in farming practices.
• Agricultural Extensification: The process of expanding agricultural land use into new areas, often through the clearing of forests or other natural habitats.
• Food Security: The availability of sufficient, safe, and nutritious food to meet the dietary needs of a population.
• Food System: The network of activities, processes, and relationships involved in producing, processing, distributing, and consuming food.
• Agroecology: A holistic approach to agriculture that emphasizes the importance of ecological interactions and biodiversity in agricultural systems.
• Circular Migration: A type of migration where individuals move to a new location for work and then return to their original location.
• Burgess Concentric Zone Model: A model that predicts that cities will grow in a series of concentric zones, with high-density residential areas near the city center and lower-density areas in the suburbs.