Wasn't even a strong storm in this location, flimsy power poles without bracing weren't knocked down.
Many unanswered questions such as status of the crop, water in the field or not, excess fertilizer can cause weak crop leading to lodging.
Where exactly was the photo taken?
Topography, did a stream of water flow through one field and not another?
There is not enough information to evaluate anything else at the distance in this photo without further info..
Don't claim a mystery until you have enough information to call it one....