Which outcome resulted from intensive maize cultivation in the pre-Columbian Americas using slash-and-burn techniques?

💡 Explanation

When land is cleared by slash-and-burn, initial ash fertilization is offset by rapid nutrient leaching and topsoil erosion because the protective vegetation is removed, leading to depleted soil fertility and increased erosion. Therefore decreased long-term agricultural potential results, rather than improved conditions which result from sustainable practices.

• Which error amplified during multi-sight celestial navigation using an 18th-century sextant affects calculated longitude most significantly?
• Which environmental shift threatened pre-Columbian chinampa maize cultivation in the Valley of Mexico?
• Which mechanism caused timber-framed fortifications like motte-and-baileys to degrade relatively quickly?
• Which environmental outcome resulted from the extensive usage of chinampas by the Aztecs in the Valley of Mexico?
• Which risk increases when the drainage system in ancient Andean terraced fields becomes obstructed?
• Which precision limit affects angle measurement accuracy when using a medieval astrolabe?