Power Harrow vs Disc Harrow


Harrows play a crucial role in farming, and selecting the appropriate type is vital for successful tasks. The contrast between power harrows vs disc harrows lies in their functions.

Power harrows are optimal for enhancing soil structure, whereas disc harrows are exceptional for initial soil breakup and blending. In this blog acquire knowledge about these harrow varieties so that each can be utilised for their particular strengths.

Comparison and Contrast of Power Harrow vs Disc Harrow 

What is a Harrow?  Generally speaking, farmers all over Europe rely on this farm implement, which is an important tool. They serve the purpose of either breaking up compacted soil or evenly distributing it.

Thus, there are multiple varieties of harrows however, the disc harrow takes the lead as the most extensively utilised option.

For minimum tillage, Kelly Diamond Harrow is the most preferred Disc Harrow.

Farmers, take a moment to review this comparison between the two options. It will help you make an informed decision to enhance the efficiency of your farming operations.

Function & Purpose 

  • Kelly Diamond Harrow is a tool that breaks up large lumps of soil using angled disc blades. These blades can be adjusted to go shallower. It’s usually used after ploughing or to integrate crop residue/stubble into the soil. This harrow cuts and flips the soil around.
  • The main purpose of a power harrow is to facilitate seedbed preparation and even out the soil surface. This tool is commonly employed prior to planting, aiming to establish optimal conditions for seed germination and the development of roots.


  • A disc harrow features a series of circular, concave disc blades mounted on a horizontal shaft. These blades operate by vertically slicing through the soil.
  • It is composed of several groups of rotating tines, which are positioned in a helical or spiral arrangement on a horizontal shaft. These tines effectively dig into the soil, breaking it into smaller particles and thus producing a finer seedbed.

Residue Management

  • Able to manage significant volumes of crop residues and assist in efficiently blending them into the soil. 
  • On the contrary power harrow can mix leftover plant materials into the soil, but it might not be as good as a disc harrow at handling really big amounts of these materials.

Cost & Maintenance 

  • Diamond Harrows possess a straightforward design with a reduced number of moving components, typically leading to decreased maintenance expenses.
  • On the other hand, the second type of harrow as discussed above made with a more complicated design, including many parts that move. Due to this, they often need more maintenance, which can be more expensive. 

Best Kelly Harrows are below mentioned choose wisely:  

2006 Model  

The 2006 Model incorporates an offset diamond chain arrangement to enhance centerline overlap. This streamlined design integrates hydraulic chain tensioning and uniform wing and transport wheels, promoting heightened stability and ease of maintenance. 

Through its adaptable wings that float, it closely follows the natural curves of the soil, ensuring a consistent and level cut in uneven landscapes too.

Model 4012 

The Model 4012 has been carefully designed to excel in durability, effectiveness, and flexibility. Its forward-towing capability has been crafted to ensure substantial horsepower, all while enabling sharper turns. 

Additionally, the front wing cylinders have been strategically positioned to provide enhanced safeguarding against potential damage. With its remarkable adaptability, this model stands fully prepared to conquer any task presented before it.

Model 1204 

This adaptable Model 1204 combines exceptional build quality and fuel efficiency, all within a compact design that can be effortlessly towed by a 100-hp tractor.

How Does a Disc Harrow Work? 


  • Before using the disc harrow, the person operating it has to set how deep the harrow goes into the ground and the angle it’s positioned at. This depends on factors like the type of soil and what they want to achieve. The harrow is then connected to a tractor or another appropriate vehicle with a PTO system.

Ground Penetration 

  • While the tractor is in motion, the combined effect of the disc harrow’s weight and the downward force applied by the hydraulic systems results in the soil penetration of the discs. The depth to which the discs penetrate can be controlled by modifying both the harrow’s height and the hydraulic pressure.


  • The power from the tractor’s power take-off (PTO) is transmitted to the shaft of the disc harrow. As a result, the shaft’s rotation prompts the spinning of the discs. The rotation of these discs then creates a cutting and slicing effect.

Cutting & Mixing 

  • When the rotating discs come into contact with the soil, they effectively slice through clumps and break apart densely packed earth. The sharp edges of the discs also help chop up plant residue, weeds, and other debris. 
  • This method not only gets the soil ready for planting but also helps mix organic material into the soil.

Turning & Inversion 

  • The discs serve a dual purpose of cutting, mixing, and turning over the soil. This flipping action plays a crucial role in bringing up nutrient-rich soil from lower strata to the topmost layer, thereby facilitating enhanced root development for crops.


  • It additionally plays a role in achieving a uniform soil surface. By rotating its discs, it redistributes soil particles, smoothing out depressions while diminishing raised areas. This process results in a more consistent seedbed, ideal for planting purposes.


  • Farmers can make the disc harrow work better by changing various settings for instance the spacing between disc gangs, the angle of the discs, and the working depth.
  • These modifications are done on the basis of factors like the type of soil, level of moisture, and the specific crop intended for cultivation.

Which is the Best: Power or Disc Harrow

In summary, if your focus is on achieving precise soil preparation and establishing an ideal seedbed, opting for a power harrow would likely be more advantageous.

 Conversely, when faced with more challenging soil conditions and the requirement to cover extensive farm areas containing heavy residue, a disc harrow will be the more fitting option. Prior to making a choice, it’s crucial to take into account your particular soil type, farming objectives, and the specific tasks you’ll undertake.