Ok, I think the average american farmer has way bigger field, but here in germany, there are often small patches of fields, so it might be expensive, but not so

Ok, I think the average american farmer has way bigger field, but here in germany, there are often small patches of fields, so it might be expensive, but not soo expensive that quite some farmers would care to not spray on a windy day, as long as they can cover their fields (and their organic neibhor then cannot sell his products as organic).