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:
Which of the following statements regarding seed metering mechanisms in agricultural drills and planters is/are correct?
Options:
(A) Fluted roller feed mechanism is widely used for sowing cereal grains such as wheat and barley.
(B) Horizontal cell plate metering devices are commonly used in precision planters for bold seeds like corn and groundnut.
(D) Internal double-run feed mechanism is not suitable for small seeds like mustard.
Answer Key:
A, B, C
Step-by-Step Solution & Explanation
• Fluted rollers are the standard mechanism on grain drills for cereals like wheat (A is correct).
• Horizontal plate metering with cell plates is typical for row-crop precision planters for maize/groundnut (B is correct).
• Vacuum/pneumatic singulation meters pick single seeds using negative pressure, accommodating irregular seed sizes with minimal damage (C is correct).
• The internal double-run feed has one side with a small opening for small seeds (like mustard/rape) and a large side for coarse seeds; thus statement D is incorrect.