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    Equipment (9)
    Soil and water (8)
    Field (7)
    Planting (3)
    Field Preparation (2)

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    Aerial (3)

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    United States (30)
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    Gerald Holmes (25)
    G.E. Cardon (5)
    Nikolai Sokolov (1)

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Landscape (30)
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Irrigation: Flood

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Subject Scientific Name Images
fertilization 1
field preparation 7
irrigation 23

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