There's been a rotary conversion in combine technology in the United States over the past 14 years, yet it's fascinating to see how the engineers at the different harvest makers have tackled the threshing and separating challenge. Add in changing crop genetics, and you'll find there are significant differences in the choices on the market.

Today's buyer has seven different threshing systems from which to choose, and all have some type of rotary function, which is a significant change since the turn of this century.

We'll run through the tech available in alphabetical order and we're looking at threshing and separating systems. Rest assured every combine maker is competing hot and hard in the creature comfort, visibility and harvest monitoring side too. And we expect some news about those kinds of improvements from the fall farm shows, but we've been told the basics of the separation/threshing systems won't be changing this year.

We're focusing on the iron and the ingenuity that goes into the business end of the combine.

PLUS: Shaping up data for harvest time

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