To me it is all about the pattern that the crop rows make. I shot this same scene a week earlier when the farmer was planting the corn. This was a one day thing as it relies on the newly turned soil, which is dark, contrasting with existing soil, which is light. The next day the soil has dried out to a more uniform color so the patterns are not as interesting. I got some very interesting patterns, with and without the tractor, but unfortunately the sky was not cooperating and was bland grey.
The above image is about a week after the planting and the corn has sprouted just enough so that it creates the patterns rather than the soil contrast.
I will get another shot as beans are planted latter than corn and they are not planted yet do to the rain. I shoot this also in infrared as there is a strong contrast between the sprouts and soil. I look for strong patterns in rolling fields - not many of those around here so I have only a couple spots to go to.