Today they hadn't started harrowing yet, so I got to take a good look at this harrow and to ask the guy who was driving just why they were using it. The middle section is a gaggle of wheels that are brushed off continually by wire brushes attached to a metal pole. He explained that longer and wider prongs break up the packed earth to different, greater depths. Today two of these particular harrows went out with the regular three that drag metal tines.
I didn't stay to watch them. It's brutally hot.
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