The Opti Ag Systems Opti-Mulch has been designed for all areas, with a focus on those with high stubble loads. We understand the challenges in retaining stubbles, mainly the impact it can have on the following season's seeding, and have looked to design and build a machine to manage this for you.

The Opti-Mulch is manufactured with discs of 600mm or 760mm, and concavity of 70-80mm, set on two rows and on opposing angles, giving excellent soil contact for the incorporation of organic matter. The integrated seed bed roller allows a one-pass operation, with no need to roll again prior to seeding.

This machine is a great option for those wishing to incorporate their lime into the soil, with cultivation depth up

OptiMulch Bar
OptiMulch Bar

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OptiMulch Bar
OptiMulch Bar

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to 20cm. Research conducted by the GRDC has shown a positive impact incorporating lime with cultivation at depths up to 20cm, with some areas seeing increases of 0.9pH depending on liming rate.

Another great use for the Opti-Mulch is controlling summer weeds without the use of chemicals. As we know, the resistance levels for a lot of ag chem products is increasing, and the Opti-Mulch allows you to reduce the use of some chemical groups.

We have designed the Opti-Mulch to have space for liquid tanks, giving growers the choice to spray different products while mulching stubble. Whether you choose to apply UAN or molasses to decrease the time it takes for stubbles to break down, or apply a herbicide in front, the options are there.

Historically, stubble has been burnt because it improves weed control and creates easier passage for seeding equipment. However, the practice of burning stubble has recently declined due to concerns about soil erosion and loss of soil organic matter. Instead of being burnt, stubble is increasingly being retained which has several advantages for soil fertility and productivity.

Retaining stubble increases the input of carbon to soil. Stubble is approximately 45 % carbon by weight and therefore represents a significant input of carbon to soil. However, retaining stubble can have a larger effect on the carbon in the microbial biomass in soil. When stubble is retained, the greater inputs of organic carbon to soil increase its biological fertility. Microorganisms in soil require organic carbon to obtain the nutrients and energy they need to live.

Retaining stubbles returns nutrients to the soil, the amounts depend on the quality and quantity of stubble. Wheaten stubble from a high yielding crop may return up to 25 kg of available nitrogen per hectare to the soil. The addition of organic matter with retained stubbles supports soil life, and can improve soil structure, infiltration and water holding capacity. These benefits are greater when used with integrated no till practices.

  1. High stubble load capacity.
  2. Built tough for Australian soil
  3. Great for incorporating lime, up to 20cm into the soil.
  4. Built to carry liquid tanks to apply various liquid products.
  5. Improves plant matter and carbon incorporation.