Related Clues:

• Parcel parts
• South 40, say
• Spread units
• Arnold the Pig's were green
• Farm size measure
• The 40 of 'the back 40'
• "The lower 40" units
• There are 640 in a square mile
• Plot measurement
• Units of farmland
• "Land for sale" sign word
• 'Green ___' of 1960s TV
• Farmer's measures
• Property measurement
• Back 40 units