High-yield crops
Cereal varieties bred to be short and stiff-stalked so they can carry a heavy, fertilizer-fed head of grain without toppling — converting synthetic fertilizer into food far more efficiently than the tall traditional landraces, and multiplying yields several-fold.
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✦ Moment, wirklich?
Norman Borlaug is often called the man who saved a billion lives. Working in Mexico, he bred wheat carrying a Japanese dwarfing gene — descended from the variety Norin 10 — that kept the plant short and strong enough to hold a fertilizer-swollen head upright instead of collapsing. His varieties helped India and Pakistan roughly double their wheat harvests within years and turn from the edge of famine toward self-sufficiency. In 1970 he received the Nobel Peace Prize — the only agricultural scientist ever to win it.
Was es ist
High-yield crops are cereal varieties — chiefly wheat and rice — bred deliberately to make the most of fertilizer and water. The key trait is short stature. Traditional cereals are tall; feed them heavy nitrogen and they grow taller still, then fall over (lodge) under the weight of a big grain head, rotting on the wet ground. Green Revolution varieties carry dwarfing genes that keep the stalk short and stiff, so the plant puts the extra nutrition into grain it can actually hold up. Norman Borlaug's semi-dwarf wheats, developed in Mexico from the 1940s onward and carrying a dwarfing gene from the Japanese variety Norin 10, were the breakthrough; the parallel rice line, IR8 or "miracle rice," was released by the International Rice Research Institute in 1966.
Warum es zählte
By the mid-twentieth century, population was outrunning food in much of Asia, and forecasts of mass famine in India and Pakistan were mainstream. High-yield varieties, planted with fertilizer and irrigation, broke the trend: Mexican wheat output climbed several-fold, and India and Pakistan roughly doubled their wheat harvests in a handful of years, pulling back from the brink. The scale of the reprieve is why Borlaug is credited with saving on the order of a billion lives and why the effort as a whole is called the Green Revolution.
Was es erschloss
Food output that kept pace with, and for decades outran, population growth across much of the developing world, averting predicted famines and reshaping the demographics of Asia. It also bound farming tightly to industrial inputs — fertilizer, irrigation, and later pesticides — with real costs in water depletion, soil and runoff problems, and the narrowing of crop diversity as thousands of local landraces gave way to a few elite lines. The Green Revolution is both one of the clearest humanitarian successes of modern science and the origin of the sustainability debates that define agriculture now.
Kleinste funktionsfähige Version
A short, stiff-strawed cereal variety — carrying a dwarfing gene and bred for disease resistance — grown with heavy nitrogen fertilizer, controlled irrigation, and dense planting, so the extra nutrition goes into grain instead of tall, floppy straw.
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Setzt voraus
Erschloss
Die Grenze — dahinter ist noch nichts kartiert.
Quellen
- — Norman Borlaug, Nobel Lecture, "The Green Revolution, Peace, and Humanity" (1970)
- — Leon Hesser, *The Man Who Fed the World: Nobel Peace Prize Laureate Norman Borlaug* (2006)
- — Vaclav Smil, *Enriching the Earth: Fritz Haber, Carl Bosch, and the Transformation of World Food Production* (2001)
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