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Agricultural engineering
61
Tobacco -- Harvesting
40
Tobacco -- Research
39
Agricultural machinery
36
Agriculture -- Research
33
Farm mechanization
21
Employees -- Workload
19
Harvesting machinery
18
Growth (Plants)
15
Plants
15
Statistics
15
Vibration
13
Pesticides
12
Agriculture -- Economic aspects
11
Plants -- Measurement
10
Plants -- Research
9
Tobacco
9
Tobacco curing
9
Force and energy
8
Temperature
8
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