To get it out of the ground... well you might be in for a trial if you want to get it all. It can have tap roots three feet or more long, so expect to not get it all. Loosen the soil with a spade fork (garden fork as Bryant called it) all around the plant. Then plunge deeper right close to the plant, and try to bend and lever it out.
If you have extensive groves of burdock and want to get rid of it, mow it down, saturate it with a hose, and cover it with cardboard, overlapped by a foot or more. Any attempt by the plant to make it through the cardboard is trimmed off and more cardboard added. The worms will take care of it and the extensive roots will
compost to provide a depth of rich soil.
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