v On the basis of degree of perish ability:
Most of the fresh foods are perishable because moderate to high moisture content and their nutritional quality. Among this mature and dry plant foods can resist spoilage at room temperature.
| Degree of perish ability (storage life at room temperature) | Moisture content (%) | Products or foods |
| 1. Perishable (1-7 days) | 70-90 (Medium-high m.c.) | Animal food such as milk, poultry, sea food, plant foods such as soft juicy fruits and vegetables with high respiration rates. |
| 2. Semi perishable (1-several weeks) | 60-70 (medium m.c) | Plant foods such as root, crops, fruits e.g. apples, pears, potatoes etc. |
| 3. Non-perishable (1 year or more) | 8-12 (low m.c) | Plant foods such as various food grain dried beans and peas, nuts, sugar, flour etc. |
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