Agricultural Revolutions and Practices

Agricultural Hearths & Domestication

• Domestication: Taming plants/animals for human use.

• Agricultural Hearths: Locations where domestication began.

  • Commonalities: Fertile soil in river valleys, water availability, moderate climates, societal structures.

• Major Hearths & Crops/Animals:

  • Americas:

    • Squash, Pepper, Cassava, Cotton, Lima Bean, Maize, Potato, Sweet Potato

    • 9,000+ years ago

  • Sub-Saharan Africa:

    • Yam, Sorghum, Cowpea, African Rice, Coffee, Finger Millet

  • Southwest Asia (Fertile Crescent):

    • Settled farming emerged, leading to cities.

  • East Asia:

    • Rice, Soybean, Chinese Chestnut, Walnut

  • Southeast Asia:

    • Mango, Taro, Coconut, Pigeonpea, Slender Millet

Diffusions & Exchanges

• Columbian Exchange: Exchange of animals, plants, culture, human populations, diseases, and ideas between Americas and Afro-Eurasia post-Columbus.

• Primary/Secondary Hearths: Indicate origin and subsequent development centers.

• Dispersal Routes: How domesticated species spread (e.g., Atlantic/Pacific/Indian Oceans).

Agricultural Revolutions

• First Agricultural Revolution: Domestication of plants/animals, enabling settled life.

• Second Agricultural Revolution: Coincides with Industrial Revolution, increasing yield and access via machines and transportation.

  • Causes: Industrial Revolution and Enclosure Movement.

  • Effects:

    • New technology increases food production.

    • Better diet, longer life, more factory workers.

    • Demographic shifts: urbanization, fewer farmers.

• Enclosure Movement: British laws enabling landowners to enclose communal land.

  • Emergence of commercial agriculture.

  • Fewer, larger farms lead to decreased farm owners and more laborers.

  • Improved techniques decrease agricultural labor needs.

  • Urbanization: Mass migration to cities for factory work.

• Green Revolution: Spread of technologies (high-yield seeds, fertilizers) to the developing world (1960s-70s).

  • Positives:

    • Increased crop yields on same land, decreasing food prices.

    • Improved variety.

  • Negatives:

    • Destroys local land and traditional agricultural modes.

    • Decreasing biodiversity due to hybrid seeds.

    • Impact of chemical Biotechnology: Application of scientific techniques to modify plants, animals, and microorganisms.

Contemporary Agriculture: Challenges & Debates

• Agricultural Biotechnology: Modifying plants/animals using scientific tools (pesticide-resistant crops, antibiotics, biofuels).

• GMOs: Genetically modified organisms for desired traits.

• Aquaculture: Raising fish/shellfish in controlled environments.

• Value Added Foods: Increased value through alterations in production/appearance.

• Organic Farming: No synthetic pesticides/fertilizers or genetically engineered seeds.

• Fair Trade: Fair prices paid to producers in MDC and LDC trade.

• Community-Supported Agriculture (CSA): Mutual support between growers and consumers.

• Urban Farming: Integrating agriculture into urban ecosystems.

• Dietary Shifts: Moving towards fruits/vegetables, away from processed foods/meat/sugars.

• Food Insecurity: Lack of reliable access to affordable, nutritious food.

• Food Desert: Limited access to fresh food in low-income areas.

• Weather Impacts: High temperatures, drought, flooding, storms, etc., affect agricultural production.

Women in Agriculture

• Challenges: Denied loans, lack of access to inputs (land, equipment, etc.), inability to generate surplus, exposure to environmental hazards.

• Knowledge & Skills: Women often hold traditional agricultural knowledge.

• Spiritual Role: Represent fertility ideals linked to agricultural productivity.

• Legal/Political Barriers: Laws prevent land ownership, lack of political power.

• Empowerment Benefits: Increased productivity, reduced hunger/malnutrition, improved livelihoods.

Agricultural Production Regions

• Subsistence Agriculture: Producing only enough food to survive (no surplus).

• Commercial Agriculture: Production for sale and profit.

• Monoculture: Growing one crop at a time.

• Mono-Cropping: Growing one crop year after year.

Spatial Organization & Economic Forces

• Bid-Rent Theory: Land price/demand changes with distance from the central business district (CBD).

• Commodity Chain: Activities in product creation (design, production, manufacturing, distribution).

• Agribusiness: System linking industries to the farm.

• Economies of Scale: Cost advantages from large-scale production.

Von Thünen Model

• Explains rural land use based on transportation costs and distance from the market.

• Rings: Dairy/gardening (close, perishable), forests (close, fuel), extensive agriculture (grains/field crops, distant), livestock/ranching (farther, cheap land).

• $Rent = f(Distance,Transportation Costs)$

Global System of Agriculture

• Global Supply Chain: Worldwide network to maximize production profits.

• Export Commodity: Goods sold to other countries (e.g., Haitian coffee).

Consequences of Agricultural Practices

• Pollution: Soil contaminated by chemicals.

• Land Cover Change: Agricultural areas lost to development.

• Conservation: Protecting wildlife and natural resources.

• Deforestation: Loss of trees due to human activity.

• Desertification: Dry areas becoming drier.

• Irrigation: Moving water to needed areas.

• Draining Wetlands: Drainage for agricultural practices.

• Pastoral Nomadism: Herding animals and migrating for pasture.

• Soil Salinization: Salt buildup in irrigated soil.

• Terrace Farming: Growing crops on hillside terraces.

• Changing Diets: Increased meat demand in MDCs/LDCs, more processed foods.