Chapter 7 - Soil, Agriculture, and the Future of Food

Chapter 7 - Soil, Agriculture, and the Future of Food

Key Challenges

  • Need to feed a growing population.

  • Balance traditional, industrial, and sustainable agriculture.

  • Importance of soil, including erosion and degradation.

  • Issues with irrigation, fertilizers, and genetic engineering.

  • Raising animals for food and organic agriculture considerations.

Kennesaw State University

  • Operates closed-loop culinary sustainability programs.

  • On-campus farms supply food; waste composted back to soil.

  • Sustainable design in dining services minimizes waste and energy use.

Global Food Issues

  • Under and overnutrition, with 800 million undernourished worldwide.

  • Food security is vital; many face food insecurity.

  • Nutritional issues include malnutrition and deficiencies.

Agricultural Evolution

  • Transition from hunter-gatherer societies to industrial agriculture.

  • Green Revolution increased yields but harmed environment.

  • Sustainable practices are essential to mitigate negative impacts.

Soil Formation and Composition

  • Soil is made of rock, organic matter, nutrients, and organisms.

  • Formation involves weathering, organic matter accumulation, and time.

  • Profiles consist of horizons (O, A, E, B, C, R) with varying properties.

Irrigation and Fertilization

  • Essential for crop growth; major water consumer (70% of freshwater).

  • Risks include waterlogging and salinization.

  • Sustainable practices like drip irrigation and precision farming are key.

Sustainable Agriculture Practices

  • Addressing soil degradation through crop rotation and contour plowing.

  • Use of cover crops and reduced tillage to protect soil.

  • Policy incentivizes conservation practices but may promote unsustainable methods.

Pest Management and Pollinators

  • Cultural and chemical methods for pest control, integrated pest management (IPM) as a solution.

  • Importance of pollinators for food crops; declining populations due to pesticides and habitat loss.

Animal Agriculture

  • Rising meat production has environmental implications.

  • Feedlots increase efficiency but cause pollution issues.

  • Aquaculture as a response to overfishing; raises concerns about ecological impacts.

Genetically Modified Organisms (GMOs)

  • GMOs involve direct genetic manipulation; have become widespread.

  • Debate over benefits (e.g., increased yields) versus ecological concerns.

Organic and Local Agriculture

  • Growth of organic farming and local food movements; federal standards for organic labeling.

  • Community-supported agriculture (CSA) connects consumers with local farmers.

Future of Agriculture

  • Sustainable agriculture addresses societal, economic, and environmental needs.

  • Focus on food security, resource conservation, and profitability for farmers.