Which of the following sensors and instruments are commonly used on modern combine harvesters for REAL-TIME yield monitoring in precision agriculture?
Options:
(A) Impact-plate grain mass flow sensor located at the top of the clean grain elevator
(B) Capacitive or microwave moisture sensor in the grain bypass auger
(C) GNSS (GPS) receiver for georeferencing instantaneous harvest coordinates
(D) Bourdon tube pressure gauge attached to the engine radiator
Answer Key:
A, B, C
Step-by-Step Solution & Explanation
A combine yield monitor requires:
- Mass flow sensor (impact plate or radiometric sensor) to measure clean grain flow.
- Moisture sensor to normalize yield to standard grain moisture content.
- GNSS receiver to map yield spatially across the field.
A radiator pressure gauge monitors engine cooling, not yield.