Just when you thought you had seen every cultivation system going, a new one comes along which rewrites the book. The Kelly multi-purpose harrow doesn't use tines or presses and, while it has discs, they are very different to those used by "traditional" cultivators. Instead, this trailed cultivator uses "strings" of small-diameter discs set out in a diamond shape so that the two front sets are angled to turn the soil in and the rear sets turn it back out again.
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