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There is interest in Canada in seeding grass seed using air seeders and air drills that were originally designed for seeding cereals and oilseeds. These seeders use an air delivery system to move the seed from large grain tanks on the seeder to the cultivator furrow openers for seed placement in the ground. Various types of furrow openers (i.e. spoons or knives) were evaluated for their effectiveness in placing meadow brome grass seed (Bromus riparius [Rehmann]) in the ground. Knife openers provided the best seed emergence results. Seed brakes and variable air velocities were also evaluated as a means of preventing the seed from blowing out of the seed row when using high air velocities. The screen-type seed brakes were prone to plugging with the grass seed. Acceptable seeding results were achieved without seed brakes when used at low air velocities; however, at these lower air velocities, seed distribution may be less accurate. It was also shown that when monoammonium phosphate (11-51-0) was mixed with the meadow brome grass seed at 33 kg ha-1 as a means of preventing seed bridging in the delivery system, the seedling emergence counts were significantly less than applying the fertilizer at the point where the seed enters the openers.

Evaluation of Openers for Seeding Meadow Brome Grass (Bromus riparius) Using Air Delivery Seeding Systems