Historical clue formulations

• Prepared for planting — 2019-09-30
• Like much arable land — 2013-10-25
• Cultivated the soil — 2007-11-05
• Did farmwork — 2003-08-29
• Worked the land — 2002-04-21
• Worked the field — 1999-10-04
• Worked the soil — 1998-12-15
• Cultivated — 1996-11-20