Preservation of Vegetables – Basic 6 Agricultural Science Lesson Note (First Term)

Learning Objectives: By the end of the lesson, pupils should be able to:

• Identify vegetable crops
• Describe the preservation of vegetable crops
• Preserve some vegetable crops

Lesson Content:

What are Vegetables? Vegetables are plants or parts of plants that we eat for their nutrients, especially vitamins and minerals.

Examples of Vegetable Crops:

• Onion

• Okra

• Spinach

• Water leaf

• Lettuce

• Cabbage

• Carrot
• Tomatoes

Methods of Preserving Vegetables:

1. Refrigeration

• Keep vegetables cold and fresh
• Best for leafy vegetables like lettuce

2. Drying

• Remove moisture from vegetables
• Examples: Dried tomatoes, dried peppers

3. Blanching and Freezing

• Quick cooking in hot water, then freezing
• Keeps vegetables fresh longer

4. Pickling

• Preserve in vinegar or salt water
• Common for onions and cucumbers

5. Dehydration

• Remove all water from vegetables
• Makes them last very long

Special Preservation Methods:

For Onions:

• Cure in sun after harvesting
• Store in dry, airy places
• Braid together for hanging storage

For Leafy Vegetables:

• Wash and dry gently
• Store in refrigerator
• Use quickly as they spoil fast

For Okra:

• Slice and sun dry
• Store dried okra in containers

Simple Preservation Activity: Students will practice sun-drying sliced okra and learn proper storage methods.

HOMEWORK:

1. Name 6 vegetable crops
2. Describe how to preserve onions after harvesting
3. Why do leafy vegetables need to be used quickly?