Environment & Ecology · Nutrient Cycling in Agroforestry
What is the primary mechanism through which deep-rooted trees in an agroforestry system facilitate 'nutrient pumping' for shallow-rooted crops?
Verified Solution4 OptionsUpdated: October 2026👁️1 View
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- 1Increasing the rate of chemical weathering of the underlying bedrock
- 2The active secretion of enzymes from shallow roots to break down surface rocks
- 3Absorbing nutrients from deep soil layers and depositing them on the surface via leaf litter decay✓
- 4Excreting excess nitrogen directly through root nodules into upper topsoil
Correct answer
Absorbing nutrients from deep soil layers and depositing them on the surface via leaf litter decay
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