A fertilizer drill has row spacing40 cm and meters38 g per row per metering-wheel revolution. Ground wheel diameter 60 cm. For200 kg/ha and no skid, find ground-wheel:metering-wheel speed ratio. Use π=3.14.
One ground revolution covers per-row area πD s=3.14(.60)(.40)=.7536 m². Required fertilizer=.020 kg/m²×.7536=.015072 kg=15.072 g. Metering revolutions per ground revolution=15.072/38=.39663. Thus speed ratio=38/15.072=**2.52:1,B**.
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