Researched
Combine Harvester
Hiram Moore's combine (patent 1836) cuts, threshes and cleans grain in one pass; Massey-Harris's self-propelled No. 20 (1938) makes it routine.
Open in the interactive tree →A combine replaces dozens of workers at harvest. Combine-mounted yield monitors later started precision farming.
Prerequisites
Unlocks
- Precision agriculture2020sYield monitors on combine harvesters started precision farming