The Tyne Drill is generally suited to situations where pastures are being sown into fully cultivated seed beds, or where any existing pasture has been completely removed by prior spray applications. The three ranks of tynes provide excellent ability for trash to pass between the tynes during sowing. The Coulter Tyne Drill is recommended for use in the improvement of existing pastures where some or all of that existing pasture is intended to be retained. The coulters cut a path ahead of each sowing tyne which minimizes disturbance of existing pasture. The Disc Drill uses an adjustable breast cut to vary the width of the slot. By cutting a slot just wide enough to sow seed and fertiliser, soil firmness can be maintained, minimizing lost grazing time.