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Agricultural engineering
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11
Farm mechanization
4
Tobacco -- Harvesting
3
Tobacco -- Research
3
Flue-cured tobacco
2
Tobacco curing
2
Angles (Geometry)
1
Curing
1
Defoliation
1
Force and energy
1
Greenhouses
1
Plants
1
Roots (Botany)
1
Solar energy
1
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