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Grassland reseeding: ploughing and cultivation top tips
From setting up the plough correctly to overseeding, our top tips act as a handy reminder when cultivating for a reseed.
Back to: Establishing grassland reseeds
Preparing the seedbed
An appropriate seedbed can be achieved using a variety of tools, such as power harrows, chain harrows, discs and levellers. Regardless of technique, it is important to ensure:
- A fine, crumbly tilth is achieved. If soil aggregates are too large, the seed will fall too deeply into the soil to germinate
- The seedbed is properly consolidated to achieve good seed-soil contact and avoid it drying out
- The soil is cultivated to the appropriate depth. It can be sufficient to have the second cultivation pass shallower than the first, g.a power harrow at 10 cm and then 5 cm depths can give a firm seedbed
- The seedbed is level to ensure an even drilling depth
Ploughing top tips
Take time to set up the plough:
- Check manufacturer’s specifications for tyre pressure to minimise wheel slip but avoid compaction
- After the first pass, check the right furrow depth is being achieved and the plough is working at 90° to the ground, turning the sod over completely. By doing this, good contact can be maintained with the soil below the sod. This can avoid a plough pan forming and keep water and air moving down through the soil profile
- The front furrow width should also be checked to ensure even furrows at each pass
- Throughout the operation, regularly check the correct furrow is being achieved
- Consult manufacturer’s instructions for fine-tuning plough set-up
- Avoid ploughing too deep (>15 cm), as this will move the fertile soil below the root depth
- Secondary cultivations should be carried out promptly to achieve a crumbly structure and consolidate the seedbed, to reduce drying out of the topsoil
Minimum cultivation top tips
- Graze tightly or mow to minimise the trash generated
- Applying lime prior to cultivation will neutralise any organic acid released from the trash
- Take time to set up the cultivator. Check manufacturer’s specifications for tyre pressure. After the first pass, check that the optimum depth of soil disturbance is being achieved
- Cultivate in multiple directions across the field to achieve maximum soil disturbance
- Chain harrows may help remove excess trash
- The slower the forward speed of the machines, the better the finish
- Cross drill in multiple directions for a denser sward
Overseeding top tips
- Select times of year when existing sward is less aggressive, e.g. early summer
- Preparing areas with a chain harrow can help improve seed-soil contact
- Graze sward tight or mow to reduce competitiveness of existing grass
- Avoid applying nitrogen as it will boost existing sward
- After seeding, roll or harrow
- Be aware of areas prone to slug infestation