Editing 765 (section)

==== Agriculture ====
* [[Europe]]an writings make the first known mention of a [[three-field system]] in use in [[Middle Ages|medieval]] Europe. The [[crop rotation]] is the practice of growing a series of different types of [[crop]]s in the same area in sequential [[season]]s. Under this system, the land of an [[Estate (land)|estate]] or [[village]] is divided into three large fields, and makes a given section of land productive 2 years out of 3, instead of every other year (approximate date).
</onlyinclude>