Which property determined yield limits as intensive 15th century chinampa farming expanded in Mesoamerica?

💡 Explanation

As chinampa farming expanded, nitrogen availability in the canal sediment became the primary limiting factor, because it was essential for plant growth and not easily replenished. Therefore, nitrogen controlled yields rather than tools, rainfall, or market forces which influenced feasibility differently without direct impact over crops' N supply.

• Which adaptation enabled medieval Islamic astronomers to enhance astrolabe accuracy despite atmospheric refraction effects?
• Which optical consequence primarily arises during a solar eclipse viewed through early Islamic pinhole cameras ('camera obscura')?
• Which function in early Islamic astronomical studies was improved by incorporating trigonometry into astrolabe design?
• Which risk increases when a cantilever bridge’s rocker bearing freezes due to corrosion?
• Which optical outcome results when a polished convex lens, crafted using medieval grinding techniques, exhibits significant spherical aberration?
• Which mechanism causes bronze tools from the Bronze Age to be significantly harder than pure copper tools?