| 摘要 |
A tool bar having a plurality of spaced apart ground working assemblies including a furrowing shovel with outwardly and rearwardly extending vertically adjustable mold boards on opposite sides thereof. The outer ends of the mold boards have an upper convex forwardly rounded surface and a rear edge which extends forwardly and downwardly and meets at a vertex with upwardly and longitudinally inwardly extending rear edge on a cutting blade extending along the bottom of the mold board. The mold boards are supported independently of the furrowing shovel and the outer ends of adjacent mold boards are closely spaced to form a ridge such that seed is planted on a ledge between the valley formed by the furrowing shovel and the ridge formed by adjacent mold boards.
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