English Language · English
According to the passage, what methods did ancient civilizations, such as the Egyptians and the Inca, use to accumulate and utilize phosphorus for agriculture?
- 1They relied on river flooding, seabird guano collection, and systems to trap phosphorus from natural sources.✓
- 2They synthesized superphosphate using acid treatments.
- 3They imported large quantities of chemical fertilizers from neighbouring empires.
- 4They exclusively mined phosphate rocks using advanced machinery.
Correct answer
They relied on river flooding, seabird guano collection, and systems to trap phosphorus from natural sources.
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