Free images results:
 

Crops pictures, stock photos and images

 
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Harvest Royalty Free Stock Photography
Author: Edstrom
Loarre Royalty Free Stock Photography
Author: F2
Barley Stock Photography
Author: Lsk
Leaves Stock Photography
Author: Kwanfm
 
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Also, here are some commercial RF-licensed images that match your search criteria:  
Crops Stock Images
Author: 11geiserm