Discussion
Arrange the steps of the postharvest chain for a perishable in order:
1. Precool to remove field heat
2. Harvest and grade
3. Maintain the cold chain in transit
4. Store at the recommended temperature and humidity
Select the correct sequence.
Answer: A
Correct answer: 2, 1, 4, 3
The chain follows the produce. Harvest and grading come first (2), since only sound produce is worth cooling. Precooling to remove field heat follows immediately (1) - the sooner the better, because respiration at field temperature is consuming storage life.
The produce is then held at the recommended temperature and humidity (4), and finally the cold chain must be maintained in transit (3) to the market. The last step is the one most often broken, and a break there undoes the benefit of everything before it.
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