Features Essentials Precise seed placement with excellent ground following ability. Excellent soil packing thanks to the active hydraulic press wheel. Wide range of seeding depths at 6mm increments. Heavy duty construction for a long service life in harsh conditions. Press Wheel Active-Pack control automatically maintains opener packing pressure. Double acting cylinders control breakout when working and also raise the opener for increased transport clearance. In-line valves to control tyne re-coil speed. The importance of packing pressure: Packing pressure, applied by the press wheel, is your main control of soil density around freshly sown seeds. Getting the balance right is critical for soil-seed contact and establishing capillary action to draw moisture from lower in the soil profile up to the seed bed. Different packing pressures are required for different soil conditions and seed types. Excessive packing pressure in dry sands or wet clays can result in surface sealing and incorrect seed depth. These two factors will prevent good germination. Inadequate packing pressure in dry clays or loams will not press out the clods sufficiently to close the furrow, exposing available soil moisture to evaporation. Not pressing out the clods also reduces soil-seed contact [...]

Features Essentials Design allows the option to fit tyne opener Can be mounted to either square or diamond beams Single or double shoot option Available with either plain or scalloped (or a combination of both) opening coulters Maximize seed germination with Double Disc Openers Benefits of a double disc opener include more uniform seeding depth, reduction in draft forces, trash handling ability, reduced soil disturbance and faster sowing speeds. In some cases disc openers are more suitable than tynes when sowing into rocky conditions. Sowing with a double disc opener leaves a smoother soil profile and will assist in reducing water run-off. Unique Design The John Shearer opener is well built to perform in many different soil types and conditions. Its compact and unique design means that the press wheel is much closer to the sowing boot than most others on the market. The opener is a true parallelogram unit based around two carriers: (1) the mounting carrier which attaches the unit to either a square or diamond mounting frame and (2) the main carrier on which the ground engaging coulters, (or optional tyne) and press wheel are attached. Press Wheel The [...]