| 摘要 |
A seed planting assembly is provided having a plurality of planting units supported by a tool bar, each of which being operable to form a seed trench in soil, plan t seeds in the seed trench, and close the seed trench. Each planting assembly is supported by th e tool bar via a mounting assembly that can be actuated by a vertical positioner to raise and lower individual planting units. The vertical positioner is prevented from becoming unintentionally locked during use.
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