| 摘要 |
A seed drill including depending furrow openers having a lower shovel and a supporting seed boot. Each seed boot is pivotally supported on a longitudinal drag bar assembly connected to it about a transverse pivotal connection. The forwardly extending arm at the upper end of the seed boot selectively engages one end of a longitudinal leaf spring mounted to the drag arm assembly. A preselected planting position for the shovel and seed boot is defined by an overlying adjustable stop. An arcuate abutment surface is interposed between the seed boot arm and leaf spring. A stop is interposed between the drag arm assembly and leaf spring for limiting upward movement of the free spring end.
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