Noun
A curved plate of iron (originally of wood) back of the share of a plow, which turns over the earth in plowing.
A follow board.
Source: Webster's dictionaryA major advance for this type of farming was the turnplough, also known as the mouldboard plough (UK), moldboard plow (US), or frame-plough. Source: Internet
Because of these attributes, the use of a chisel plough is considered by some to be more sustainable than other types of plough, such as the mouldboard plough. Source: Internet
By the Han period, the entire ploughshare was made of cast iron ; these are the first known heavy mouldboard iron ploughs. Source: Internet
In addition, the resulting pattern of low (under the mouldboard) and high (beside it) ridges in the soil forms water channels, allowing the soil to drain. Source: Internet
It doesn't make as good a job as the mouldboard plough (but this is not considered a disadvantage, because it helps fight wind erosion), but it does lift and break up the soil (see disc harrow ). Source: Internet
On modern ploughs and some older ploughs, the mouldboard is separate from the share and runner, so these parts can be replaced without replacing the mouldboard. Source: Internet