Obamot wrote:And then what I don't give a damn about being right, you can't know.
The second photo is probably corn. We see the rows (unlike cereals which seen from a height, form a carpet).
The spots are not "so aligned" and vary in size. Corn, at the end of the cycle, is very often invaded by bindweed, which forms patches of varying sizes. There are some other weeds (crabgrass, settlers, panics ...) which tend to form plaques in corn at the end of the cycle, for a simple reason: corn is often grown in monoculture, year after year; these weeds, less sensitive to corn herbicides, end up "mitering" the field, from area to area. Bindweed by rhizomes, each year a little larger; grasses by re-sowing, nibbling half a meter every year ...
This is typically the case with this photo: corn at the end of the cycle (yellow) and probably (I was not there!), Patches of weeds that are still green ...