Subtopic: Functional requirements, principles of working, construction and operation of manual, animal, tractor and renewable energy operated equipment for tillage, sowing, planting, fertilizer application, inter-cultivation, spraying, mowing, chaff cutting, harvesting and threshing
Question Statement:
A fluted roller seed drill has a fluted length of $50\text{ mm}$ exposed to seed flow. When the fluted length is reduced to $35\text{ mm}$ by adjusting the feed shaft, calculate the percentage reduction in seed discharge rate assuming linear proportionality.
Answer Key:
30
Step-by-Step Solution & Explanation
Seed rate is directly proportional to active fluted roller length $L$:
$\text{Reduction} = \frac{L_1 - L_2}{L_1} \times 100 = \frac{50 - 35}{50} \times 100 = \frac{15}{50} \times 100 = 30\%$