If you have a mole problem, stick loads of canes about 4 or 5 feet long into the ground round your plot, and put large plastic bottles on the top.

When the wind blows they rattle, and apparently the vibrations keep moley away.

I didn't believe it, but my dad is currently trying it on his plot and it seems to be working!

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Veni, Vidi, Velcro.
I came, I saw, I stuck around.