Historical clue formulations

• Forerunners of combines — 2018-11-04
• Some farm equipment — 2018-01-19
• Some farm machinery — 2017-06-03
• Harvesting machines — 2016-06-07
• Combining workers — 2010-08-13
• Harvesting team — 2006-09-27
• Scythe wielders — 2003-04-27
• Crop workers — 2003-04-05
• Farm equipment — 1996-11-30