Which constraint limited maize cultivation expansion in pre-Columbian Andean terraced agriculture above 3500 meters?

💡 Explanation

When soil temperature drops below a threshold, the phosphorus solubilization by soil microorganisms decreases due to reduced metabolic activity which causes phosphorus to be less available because it remains bound in solid form, limiting maize growth. Therefore phosphorus lockout limits expansion, rather than nitrogen, radiation, or CO2 concentration which pose less significant biochemical constraints.

• Which outcome accelerated Roman ballista projectile velocity by torsion spring development?
• Which structural vulnerability most critically affected Roman siege towers ('turres') during assaults on fortified cities?
• What consequence resulted when bronze reinforcing bars corroded within ancient aqueduct concrete structures?
• Which environmental consequence decreased long-term chinampa field productivity within the Valley of Mexico?
• Which structural failure risked undermining walls in Roman siege warfare utilizing mines?
• Which visual effect results when monochromatic light passes Medieval Islamic concave lens with microscopic surface imperfections?