From: Bill Lucy 

In article , mark{at}hessey.com says...
> Yea Jeff, I have. Crop rotation is another method used to improve
> production. What does that have to with leaving your entire spread vacant
> for a year every 7 years?

If you allow ground cover, nitrogen fixes in the cover (especially with
things like vetch). When that is turned in the late fall, it nourishes the
soil, allowing a good number of years (say 6) of production.

"Fallow" does not necessarily mean the land isn't planted -- it
means that it doesn't have a harvestable crop.

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