SAND FENCE SHOWS SHELTER BELT DYNAMICS

Here’s a neat demonstration of what a shelter belt does to the wind velocity at its base. Technically a shelter belt will drop the wind for 6 times its height, but this one shows it’s a bit less. Maybe sand particles are a bit heavier so drop out of the air quicker. It also shows that just next to a semipermeable wall – ie the base of the netting – the wind velocity is still quite high. So don’t plant your lettuces next to the shelter, plant them a bit back.

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