What is the function of windbreaks and shelterbelts in protecting soils from wind erosion in rangelands?

• A. No effect
• B. Only provide habitat
• C. Increase evaporation
• D. Reduce wind speed, decrease transport, protect seedlings, and improve microclimates and moisture retention

Answer: (D)

Windbreaks protect soils by altering airflow and creating a more favorable microclimate. When a belt or row of trees or shrubs slows the wind at the soil surface, the wind’s capacity to pick up and move soil particles drops, so erosion by saltation and surface transport is reduced. They act as physical barriers that disrupt strong gusts, causing some soil and dust to deposit downwind and decreasing overall soil loss in the protected area. The shaded, more humid microclimate under and adjacent to the belt also lowers evaporation from the soil surface and helps seedlings establish, which increases ground cover that further reduces erosion. In short, they slow wind, lessen transport, protect young plants, and improve moisture and microclimate—precisely the protections soils in rangelands need.