How We Try to Grow More: Production Strategies

🌱 How We Try to Grow More: Production Strategies

Humanity has developed several strategies to increase food production. Each has genuine advantages — and each carries risks and trade-offs that examiners want you to weigh up.

The Green Revolution (1960s–70s): Triumph and Trade-offs

By the early 1960s, famines in South Asia and Latin America seemed inevitable. Population was growing; traditional crop varieties could not keep pace. A group of agricultural scientists, led by Norman Borlaug, developed High Yield Variety (HYV) crops — new strains of wheat, rice, and maize engineered to produce far more grain per plant than traditional varieties.

Combined with chemical fertilisers, pesticides, and expanded irrigation, the results were extraordinary. India went from a country dependent on food aid in the 1960s to a net food exporter by the 1980s. Between 1965 and 1985, Indian wheat yields trebled. Mexico, the Philippines, and Bangladesh all dramatically increased food production. The Green Revolution is estimated to have prevented a billion deaths from famine.

But the trade-offs were serious:

• Water depletion — HYV crops need far more water than traditional varieties. Punjab, India's breadbasket, pumped so much groundwater for irrigation that the water table is now dropping by nearly 1 metre per year. At current rates, the aquifer that made Punjab's agricultural miracle possible will be critically depleted within decades.
• Soil degradation — Intensive monoculture (growing a single crop repeatedly on the same land) and heavy chemical use degraded soil structure and fertility over time. In some areas, yields that trebled in the 1970s have since plateaued or declined.
• Biodiversity loss — Replacing thousands of traditional crop varieties with a handful of HYV strains made food production vulnerable. When a disease targets one of those few strains, entire regions can lose their harvest simultaneously.
• Inequality — The Green Revolution benefited large landowners who could afford fertilisers, irrigation equipment, and improved seeds. Smaller subsistence farmers were often unable to access the same inputs, and some were pushed off their land as larger operations expanded.

GM Crops: Promise and Controversy

Genetically Modified (GM) crops have their DNA altered in a laboratory to introduce specific traits — drought resistance, pest resistance, enhanced nutrition, or higher yields. Unlike the Green Revolution's selective breeding, GM modifies genes directly, allowing traits to be introduced that could never occur through natural crossing.

The potential is significant. Drought-resistant cassava, developed for East African farmers, can survive dry spells that would kill conventional varieties. Golden Rice, engineered to produce vitamin A, could address the deficiency that causes around 500,000 children to go blind each year in developing countries. Bt cotton, which carries a bacterial gene that produces a natural pesticide, has reduced insecticide use by Indian farmers who adopted it.

But controversies are real:

• Corporate control — GM seeds are typically patented by large corporations like Monsanto (now Bayer). Farmers must purchase new seeds each year rather than saving seeds from their harvest, creating dependency and cost burdens.
• Biodiversity risk — GM crops could cross-pollinate with wild relatives, potentially introducing modified genes into natural ecosystems in ways that are difficult to reverse.
• Public resistance — The EU restricts most GM crop cultivation; consumer resistance in many countries has limited uptake even where regulatory approval exists. Whether fears are scientifically justified or not, they affect what farmers can grow and sell.

Vertical Farming: The City Solution

In the warehouse districts of Tokyo, Newark, and Dubai, lettuce grows under LED lights in stacked trays inside climate-controlled buildings. Vertical farms grow crops in multiple indoor layers — using artificial light, precise humidity control, and hydroponics (growing plants in nutrient solution rather than soil).

The numbers are striking. Vertical farms use up to 95% less water than conventional field farming (the water is recirculated rather than lost to evaporation and runoff). They can produce year-round without seasonal variation. They can be located in cities, cutting food miles to zero for local consumers. They require no pesticides because insects cannot reach controlled indoor environments.

The drawbacks are equally real. Vertical farms are enormously energy-intensive — artificial lighting costs make them only economically viable for high-value crops like herbs and salad leaves, not staple crops like wheat or rice that feed the world's hungry. A vertical farm producing wheat would cost approximately 10 times more per calorie than conventional farming. And the upfront capital costs put them out of reach for LIC governments or smallholder farmers.