Discussion
Which change would NOT extend the safe storage life of grain?
Answer: D
Correct answer: Raising the storage temperature
Raising the storage temperature shortens storage life rather than extending it. Respiration, mould growth and insect development all accelerate with temperature - insects breed fastest between 25 and 33 degrees, and safe storage life for wheat at 13 per cent falls from 1200 days at 10 degrees to 180 at 30.
The other three all extend it: a lower moisture content puts the equilibrium relative humidity below the mould threshold, cleaning removes the fines that spoil first and block airflow, and aerating to cool the bulk slows every deteriorative process at once.
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