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2. Roller (agricultural tool) - Wikipedia

   en.wikipedia.org/wiki/Roller_(agricultural_tool)

   For example, in mechanical weed control, controlling cultivator tooth depth is practical only with a decently flat soil contour, and in combining, controlling combine head height is practical only with a decently flat soil contour. Rolling is also believed to help reduce moisture loss from cultivated soil.

3. Cultivator - Wikipedia

   en.wikipedia.org/wiki/Cultivator

   Field cultivators are used to complete tillage operations in many types of arable crop fields. The main function of the field cultivator is to prepare a proper seedbed for the crop to be planted into, to bury crop residue in the soil (helping to warm the soil before planting), to control weeds, and to mix and incorporate the soil to ensure the ...

4. Plough - Wikipedia

   en.wikipedia.org/wiki/Plough

   Basically the chisel plough is a heavy-duty field cultivator intended to operate at depths from 15 cm (5.9 in) to as much as 46 cm (18 in). However some models may run much deeper. [ clarification needed ] Each individual plough or shank is typically set from 230 mm (9 in) to 360 mm (14 in) apart.

5. List of agricultural machinery - Wikipedia

   en.wikipedia.org/wiki/List_of_agricultural_machinery

   Cultivator (of two main variations) Dragged teeth (also called shanks) that pierce the soil. Rotary motion of disks or teeth. Examples are: Power tiller / Rotary tiller / Rototiller / Bedtiller / Mulch tiller / Rotavator; Harrow (e.g. Spike harrow, Drag harrow, Disk harrow) Land imprinter; Plow or plough (various specialized types) Roller

6. Harrow (tool) - Wikipedia

   en.wikipedia.org/wiki/Harrow_(tool)

   The disk harrow is used first to slice up the large clods left by the mould-board plough, followed by the spring-tooth harrow. To save time and fuel they may be pulled by one tractor; the disk hitched to the tractor, and the spring-tooth hitched to, and directly behind, the disk. The result is a smooth field with powdery dirt at the surface.

7. Tillage - Wikipedia

   en.wikipedia.org/wiki/Tillage

   Tillage after corn harvest (Click for video)Tillage is the agricultural preparation of soil by mechanical agitation of various types, such as digging, stirring, and overturning.