Jack's Land Explained

In English folklore, Jack's Land is any area of farmland that is left uncultivated due to either a perceived infertility or superstition. In some regions, the name for such areas is "No Man's Land".^{[1] [2]}

References

1. Oxford Dictionary of English Folklore, p.198
2. Book: Curtler, William Henry Ricketts. 1920. The Enclosure and Redistribution of Our Land. Clarendon Press. 11.