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Machinery
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41
Tobacco
20
Laboratories
17
Clearing of land
5
Trees
5
Women
4
Acceleration (Mechanics)
2
Agricultural education
2
Equipment and supplies
2
Grapes
2
Water
2
Agricultural laboratories
1
Agriculturists
1
College buildings
1
College students
1
Equations
1
Force and energy
1
Noise
1
Sowing
1
Tractors
1
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