Transplanting Worms into Infertile Areas

From "Temperate Permaculture Strategies" with Bill Mollison. Starting at 1 minute 55 seconds:

Take up a piece of sod with lots of worms. Put it grass down on top of other grass. Spread about a square meter of dolomite lime over it, all around it. Put these worm colonies every ten meters apart. In seven years the whole paddock will be completely covered at the rate of 4 million worms an acre.