Agriculture Reference
In-Depth Information
Figure 4.15 (a) Torsion weeders and (b) spring hoes.(Redrawn from Schweizer,
Westra & Lybecker,1994.)
Spinners are ground-driven, in-row weeders that consist of a basket-like
arrangement of spring steel wires that scratch laterally across the crop row
(Figure 4.17).They are normally used in pairs to increase the proportion of the
row area that is worked.Usually the depth is set such that the deepest penetra-
tion is a little above the planting depth and squarely in the row.Alternatively,
the tool can be set so that the deepest penetration occurs next to the row, with
the tool scratching across the row with an ascending or descending stroke. A
direct strike by the tip of a wire can cut off a crop plant, but usually mortality
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