{{unreferenced, date=October 2011
A destoner is a machine that removes stones and clods from
soil ridges and moves them to the
furrow
A plough or plow ( US; both ) is a farm tool for loosening or turning the soil before sowing seed or planting. Ploughs were traditionally drawn by oxen and horses, but in modern farms are drawn by tractors. A plough may have a wooden, iron or ...
so that the ridges are free from stones. This also helps when harvesting in wet conditions as the harvester can drive on a row of stones which helps improve traction.
They remove stone using a series of webs (between two and five webs). The stones stay on the web and the clay falls through it. The stones travel through the machine and the bigger stones fall into a boulder box and the smaller stones fall onto a cross conveyor and in turn fall into a trench. On the next pass the tractor tramps these stones down.
Destoners are usually fitted with steerable wheels which makes them more maneuverable on
headland
A headland, also known as a head, is a coastal landform, a point of land usually high and often with a sheer drop, that extends into a body of water. It is a type of promontory. A headland of considerable size often is called a cape.Whittow, Joh ...
s. Some are fitted with hydraulic leveling.
Agricultural machinery