Remove vegetation, large stones, former vines, trees etc. Beware of preservation orders.

Trees should be uprooted rather than just cut down, as roots may harbour Armillaria (honey fungus). Best to gather roots into piles and burn on the spot.Have trees checked for Armillaria, & leave fallow for 2 – 3 years.
May wish to kill off troublesome weeds such as couch grass or bindweed with a total non-residual herbicide such as glyphosate (ROUNDUP). Some growers will leave the field fallow for 1 year to ‘rest’