A stubble-field; stubble; = "eddish". Formerly also (occasionally): an aftergrowth of grass, clover, etc., after mowing.
In Old English perhaps alternatively: a piece of land that is intermittently ploughed; see discussion in etymology.
Old English; earliest use found in Royal Charter: King Caedwalla to Bishop Wilfrid. Probably from the Germanic base of ear + the Germanic base of -ish, although no cognates are known.