What is a plow, what is it used for in agriculture, what types of plows exist, and how do they work? In this article, we take a detailed look at the purpose, classification, and operating principles of the plow — a tool that is rightfully considered one of the key implements for soil cultivation.
What is a ploughs?
A ploughs is an agricultural implement designed for primary soil cultivation. It cuts, loosens, turns over, and breaks up the topsoil layer. The main purpose of plowing is to prepare the field for sowing, control weeds and pests, and improve soil aeration and moisture exchange. As a rule, a plow is operated in combination with a tractor.
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Main Functions of a ploughs
A plow performs several key functions during soil cultivation. All of them are aimed at improving soil fertility and creating optimal conditions for crop growth.
- Cutting the soil slice separates the topsoil from the lower layer, forming a slice of a specified thickness and width.
- Turning the soil slice flips the cut layer, burying crop residues, weeds, and fertilizers deep into the soil. This accelerates their decomposition and helps enrich the soil with nutrients.
- Loosening breaks up compacted soil structure, improving its physical properties as well as air and water permeability.
- Breaking up clods crushes large soil lumps, creating a fine, crumbly structure that is favorable for seed germination.
- Surface leveling smooths out field irregularities, making subsequent sowing operations and crop care easier.
Together, these functions ensure deep and high-quality soil cultivation, which is an essential condition for achieving high yields.
Types of ploughs for Tractors
There are many types of plows, which are classified according to different criteria. The right choice depends on soil type, required working depth, tractor power, and specific agronomic tasks.
By Mounting Type
Mounted plows are attached directly to the tractor’s three-point hitch. They are highly maneuverable, easy to operate, and well suited for small fields and areas with complex layouts.
Semi-mounted plows partially rely on the tractor and an additional support wheel. They are used with more powerful tractors, are suitable for medium and large fields, and provide good stability and consistent working depth.
Trailed plows are connected to the tractor via a hitching device. They have their own running gear and do not load the tractor’s three-point hitch. These are heavy-duty plows designed for operation with high-power tractors on large areas.
By Purpose
General-purpose (universal) plows are used for standard plowing of various soil types at depths of up to 25–35 cm.
Special-purpose plows are designed for operation under specific conditions:
- chisel-type plows — for deep loosening without full inversion of the soil layer;
- plantation plows — for extra-deep plowing (up to 60–70 cm) when preparing soil for perennial crops;
- brush and swamp plows — for reclaiming virgin land overgrown with shrubs as well as waterlogged areas;
- vineyard and orchard plows — for soil cultivation between rows of perennial crops, usually with the option to offset the working components.
By Soil Cultivation Method
Moldboard plows are the most common type of plow. The moldboard turns over the soil slice, fully burying crop residues.
Conventional (cultural) plows are used for primary plowing operations.
Non-moldboard plows loosen the soil without turning the soil layer, leaving crop residues on the surface. This cultivation method helps reduce the risk of wind and water erosion.
Disc plows use spherical discs instead of shares and moldboards. They perform well on heavy, stony soils and sod-covered areas.
Combination plows combine several types of working components or functions, such as moldboard plowing together with deep loosening.
Operating Principles of a ploughs
The operating principle of a plow is based on the sequential action of its working components on the soil. Each element performs a specific function, ensuring efficient and high-quality plowing.
- At the beginning of operation, the plow is set into the soil. In mounted and semi-mounted models, the working depth is adjusted using the tractor’s hydraulic system, while trailed plows are equipped with their own depth-control mechanisms.
- The plowshare, which is the main cutting component, slices the soil layer from below, separating it from the main soil mass.
- The chisel point and plowshare lift the cut soil slice and guide it toward the moldboard.
- As the soil slice moves up the moldboard, it is turned over and broken up under its own weight and the pressure exerted by the moldboard surface. The moldboard directs the soil into the furrow created by the previous plow body.
- The inverted soil slice is laid into the furrow, fully burying weeds, crop residues, and organic fertilizers.
- The plow body then forms a new furrow, into which the next soil slice is placed during the subsequent pass of the tractor.
- Plowing depth and working width are adjusted through plow settings—such as the angle of attack of the plowshare and the position of the support wheels—as well as by the tractor’s operating speed.
Overall, the operating principle of a plow remains largely the same across most designs, although specific process details may vary depending on the plow type and the working components used.
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