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Why does tropical rainforest soil stay nutrient-poor even though organic matter decomposes quickly there?

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1. Why does tropical rainforest soil stay nutrient-poor even though organic matter decomposes quickly there?

Plants reabsorb the nutrients almost as fast as they’re released

Decomposition doesn’t actually happen in rainforests

The soil is too cold for nutrients to form

Rainforest trees have no roots to absorb nutrients

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