LearningCausesv1

Mulch reduces evaporation from garden soil

A surface layer blocks sun and slows air movement at damp soil.

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Output
Soil that remains moist for longer between watering
Input
Moist soil covered with an appropriate layer of organic mulch
Relationship

What connects the input and output?

The cover shades the surface and maintains a more humid, less windy boundary layer. Water therefore leaves the soil more slowly.

Sources

1
  1. www.epa.gov: Mulch reduces evaporation from garden soilwww.epa.gov

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