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How did agricultural research increase crop yields during the 20th century?
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Agricultural technology
Cotton combine harvesting a cotton field.
During the 20th century, agricultural research revolutionized food production by shifting from labor-saving inventions to scientific methods that dramatically increased yield potential per acre. This transformation was driven by several key advancements:1
- Genetic Innovation: The Green Revolution introduced high-yield, disease-resistant varieties of staple crops like wheat and rice. Techniques such as "shuttle breeding," pioneered by Norman Borlaug, allowed for the development of strains capable of thriving in diverse climates.23
- Modern Inputs: The adoption of industrialized farming practices, including the systematic use of chemical fertilizers and pesticides, became essential to achieving the full yield potential of these new crop varieties.23
- Advanced Irrigation: Research into water management, such as the use of sprinkler systems and large-scale infrastructure projects, allowed for more efficient water distribution and the cultivation of arid lands.4
- Dry Farming: In regions with limited rainfall, systematic dry farming techniques—such as alternating-summer fallow and deep plowing—were refined to maximize soil moisture retention.5
While these innovations tripled yields for crops like corn in the United States between 1940 and 1980, they also introduced significant challenges, including environmental degradation, biodiversity loss, and economic barriers for farmers unable to afford modern inputs.123