In pre-Columbian chinampa agriculture, which environmental feedback occurred when intensive maize cultivation depleted soil nutrients without crop rotation?

💡 Explanation

When intensive maize cultivation depletes soil nutrients like nitrogen, a nutrient limitation occurs because maize has high nutrient demands; this leads to reduced photosynthetic capacity and decreased biomass accumulation, resulting in reduced grain production. Therefore, a yield decline results, rather than the others which require enhanced soil fertility or adaptation.

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