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Agronomy QUESTION #2038
Question 1
Hermetic storage technology for grain preservation works on the principle of:
  • Maintaining grain at constant low temperature using refrigeration
  • Creating a modified atmosphere inside an airtight container where respiration of grain, insects, and fungi consumes O₂ and raises CO₂, killing pests without chemicals✔️
  • Treating grain with phosphine gas before sealing
  • Using UV-treated bags to prevent insect entry
Correct Answer Explanation
Hermetic (airtight) storage exploits the biological process: grain, insects, and microbes respire, consuming O₂ and producing CO₂ within the sealed container. The resulting hypoxic/hypercapnic atmosphere kills insects and suppresses fungal growth without chemical inputs — ideal for smallholder grain storage.