How to increase earth-worm population on farm?

Image by gawthspork
worm farm recordings – ypsilanti, mich. – april 28, 2007

Question by arthur: How to increase earth-worm population on farm?
Earth-worm a good friend, un-paid labour who works 24 hours a day without complaint, who plows the land, airaits the roots, supplies fertilizers and on and on… we must have them on our farm in big quantity. What is organic way to boost their population?

Give your answer to this question below!