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Agriculture -- Research
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11
Pesticides
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11
Agricultural engineering
10
Aerial spraying and dusting in agriculture
7
Pests -- Control
7
Agricultural machinery
5
Agriculture -- Economic aspects
5
Federal aid to research
5
Cotton -- Diseases and pests
4
Electrostatic dusting
2
Spraying equipment
2
Agricultural experiment stations
1
Agricultural facilities
1
Crops
1
Farm equipment
1
Farm mechanization
1
Fungicides
1
Heptachlor
1
Livestock
1
Research grants
1
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