5.10 The Challenges of Contemporary Agriculture

Environmental Pressures from Farming

Modern agriculture strains ecosystems through overproduction, soil salinization, desertification, and water/land pollution from pesticides and fertilizers. Practices like subsidence agriculture conversion to commercial farming and heavy irrigation deplete aquifers (e.g., Ogallala Aquifer) and degrade land quality, threatening long-term food production capacity worldwide.

Genetically Modified Organisms & Green Revolution Debates

The Green Revolution boosted yields through GMOs, synthetic fertilizers, and mechanization, reducing famine risk but raising concerns about biodiversity loss, farmer dependency on corporations, and health/environmental safety. Critics argue it favors large-scale commercial agriculture over small farmers, widening inequality in the developing world.

Sustainable Alternatives & Food Security

Responses include sustainable agriculture practices like organic farming, crop rotation, agroforestry, and permaculture, alongside movements for local/organic food and fair trade. These aim to reduce environmental harm while addressing food security, especially in regions vulnerable to climate change and population growth.

Key terms

Desertification

The process by which fertile land becomes desert, often due to overgrazing, deforestation, or climate change.

Salinization

Buildup of salt in soil from excessive irrigation, reducing land fertility and crop productivity.

Green Revolution

Mid-20th century movement that used technology, fertilizers, and high-yield seeds (including GMOs) to boost agricultural output, sparking debates over dependency and sustainability.

Sustainable Agriculture

Farming practices (e.g., crop rotation, organic methods) that maintain productivity without depleting resources for future generations.

GMO (Genetically Modified Organism)

An organism whose genetic material has been altered to improve traits like yield, pest resistance, or drought tolerance.

Try an AP-style question

A food desert is…

1. a region where no farms can operate
2. an area with little access to healthy food
3. a desert that is irrigated for crops
4. a region with a surplus of fresh food