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Tobacco -- Harvesting
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17
Tobacco curing
6
Tobacco -- Research
5
Tobacco industry
5
Agricultural machinery
3
Harvesting machinery
3
Agricultural engineering
2
Agriculture -- Research
2
Farm mechanization
2
Tobacco use -- Health aspects
2
Agricultural facilities
1
Burley tobacco
1
Business travel
1
Crop yields
1
Defoliation
1
Elevators
1
Employees -- Workload
1
Force and energy
1
Labor
1
Mathematics
1