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One of the big agricultural progresses of the modern era (from the 16th century onwards) was actually introducing grass into the crop rotation, instead of letting the prime land fallow (see this wikipedia page...

Un roi sans divertissement est un homme plein de misères
by linca (antonin POINT lucas AROBASE gmail.com) on Wed Apr 16th, 2008 at 08:19:25 PM EST
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