Which agricultural consequence resulted when pre-Columbian chinampa farmers increased maize planting density beyond nitrification limits?

💡 Explanation

When maize planting density exceeded nitrification limits, ammonification outpaced subsequent conversion to nitrates, because soil microbes reducing oxygen inhibited further redox. Therefore, susceptibility to fungal pathogens increased, rather than A,C, or D which require soil contamination, compaction, and phosphorus deficiency rather than a soil microbiome changes and ammonium toxicity.

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