It is possible to bring worms to the surface and several birds do it very effectively by stamping their feet up and down which simulates rain. The worms will usually rise to the surface when it rains. I have just started digging a new lottie and ther are hardly any worms at all and yet there is plenty of manure in the soil, There are a couple of reasons for this one is the ground has been covered with black plastic and the other is the the population of moles which love earth worms. I don't have to worry about the soil being airated as it is just a complete maze of tunnels underground.
Ian
Ian
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