the world > relative properties > measurement > measurement of area > [noun] > a system or process of measuring land > area that can be ploughed in a day (2)
Ploughing, the quantity of land that may be ploughed in a day (or other space of time).
As much land as can be ploughed in a day. Properly the French word journal (ʒurnal), a land-measure varying in different departments.