| 摘要 |
Apparatus is disclosed for applying dry fertilizer or seeds beneath the soil including a plurality of hollow applicator knives to which dry fertilizer or seeds are fed from a hopper which is pulled by a traction vehicle along with the knives. There is also included a source of pressurized ammonia. Liquid ammonia is fed from the source to a conduit behind each knife and directed onto a ribbon of the dry particulate matter deposited at the bottom of each channel formed by the knives. Pressurized ammonia gas is coupled from the top of the source of ammonia into a distribution chamber equipped with one outlet for each knife. A pressure-regulating valve is connected between the distribution chamber and a nozzle located in the conduit coupling the fertilizer or seeds to each applicator knife. Hence, the pressurized gas assists in delivering the particulate matter to the applicator knives and in forcing the pellets or seeds into the channel cut by the knives.
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