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Tobacco -- Research
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37
Agricultural engineering
19
Freeze-drying
13
Tobacco industry
6
Agricultural machinery
5
Tobacco -- Harvesting
5
Statistics
4
Tobacco curing
4
Farm mechanization
3
Business travel
2
Farm equipment
2
Growth (Plants)
2
Plants
2
Plants -- Measurement
2
Tobacco use -- Health aspects
2
Agriculture
1
Agriculture -- Research
1
Automation -- Human factors
1
Biological assay
1
Cigars
1