Position adjustment of mechanical hoes - uses metallic rings buried in rows at uniform spacing during sowing for detection by hoeing machine avoiding similarly spaced plants.

摘要

The rings are sandwiched at regular intervals between two strips of paper which are bonded together (11) and wound on a reel (8). The combined strip is unrolled around guidance rollers (16) between which a plunger (18) is driven (19) downwards at intervals, pushing circular portions (10) each contg. one ring into a furrow (25) opened by a ploughshare (24). The deposited portions are then covered with soil by a following tool (22). The regularly spaced rings provide control signals for the hoeing machinery. ADVANTAGE - Hoeing capacity is increased and useful plants in defined positions are protected while weeds are uprooted.