Knowra Three-field system Three-field system The three-field system divides farmland into plots for winter crops, spring crops, and fallow, rotating their uses each year. It increased cultivated acreage and diversified harvests compared with two-field rotation.
Fallow : Farmland left unsown for a period so that it can recover or be used for grazing. One of the three plots rested from crops while livestock grazed and manure enriched the soil.
Medieval agriculture : The farming practices, technologies, and institutions used in Europe during the Middle Ages. The three-field system became a defining rotation in parts of medieval European agriculture.
Agricultural productivity : The amount of agricultural output produced from a given quantity of land, labor, or other inputs. Cultivating two-thirds of the land each year raised output relative to leaving half fallow.
Two-field system : A farming rotation in which half the land is cropped while the other half lies fallow, with their uses alternating. The three-field system cropped a larger share of land each year than this earlier arrangement.
Crop rotation : The practice of growing different crops on the same land in a planned sequence. The system is a specific rotation that assigns each plot a new use each year.
Carolingian Renaissance : A revival of learning and cultural activity in the Frankish Empire during the late eighth and ninth centuries. The Capitulare de villis documents estate management and crops in the period preceding the system’s wider use.
Horse collar : A harness that bears a draft animal’s pulling force on its shoulders rather than its throat. More effective horse traction could support ploughing and transport in farming regions using the rotation.
Four-course rotation : A crop rotation using four successive crops, commonly including wheat, turnips, barley, and clover. This later rotation eliminated the regular fallow period and supported more continuous cultivation.
Winter cereal : A cereal crop sown in autumn that grows through winter and is harvested the following summer. Winter-sown grain occupied one of the system’s cultivated plots.
Open-field system : A communal farming arrangement in which scattered strips of land lay in large, unenclosed fields. The rotation often operated across shared fields whose strips were cultivated within a village framework.
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