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Yes the average American farmer cares because inputs are expensive. Really expensive. That's why spot spraying on a massive scale has been invented. If you want to see one in action look up Welker Farms in YouTube. There are some videos and anecdotal evidence in a single field on input savings.

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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).

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