Which agricultural technique deployed by pre-Columbian civilisations prevented soil erosion on steep Andean slopes?

💡 Explanation

When slopes are cultivated, terrace farming creates level plots with retaining walls because gravity pulls soil downwards, initiating erosion, and the walls mechanically counteract this force. Therefore terrace farming effectively prevents soil loss, rather than chinampas, slash and burn or aqueducts which serve other pursposes like enhanced growing conditions or irrigation.

• Which advantage did chinampa construction provide for Aztec cultivation in the Valley of Mexico?
• Which process limits long-term maize yields in ancient, terraced Andean agricultural systems?
• Which structural consequence increases when a Roman ballista launches projectiles beyond its design range?
• Which agricultural innovation mitigated nutrient depletion from continuous maize cultivation in pre-Columbian Mesoamerica?
• Which consequence occurred when inadequately seasoned timber was used for 18th-century shipbuilding construction?
• Which biological consequence occurred when maize was cultivated at high altitudes in pre-Columbian Andes?