1. A certain field will be planted with yellow corn. The recommended plant population is 67,000 plants per ha. The planter’s ground wheel radius is 45 cm and is equipped with a 40-tooth sprocket. The sprocket turns a vertical seed plate with a 20-tooth sprocket. How many cells would be needed in the seed plate to achieve the said planting density? Furrows are spaced 75 cm apart. Assume 90% germination rate.
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