Grade 7 Agriculture CONSERVING AGRICULTURAL ENVIRONMENT – Agroforestry Notes

Agroforestry

Topic: CONSERVING AGRICULTURAL ENVIRONMENT — Subject: Agriculture
Level: Age 12 (Kenya)

What is agroforestry?

Agroforestry is a way of growing trees together with crops and/or animals on the same piece of land. It helps farmers get food, wood and keep the soil healthy. Many Kenyan farmers use agroforestry to make farms stronger against drought and erosion.

Why is agroforestry good for the farm?

• Improves soil: tree leaves add nutrients when they fall and rot.
• Stops soil erosion: tree roots hold soil on slopes (important in places like Nyeri or Kisii).
• Gives shade and protects crops from wind.
• Provide products: fruit (mango, avocado), firewood, fodder for animals, timber or income from selling tree products.
• Holds water in soil — helps in dry seasons.
• Supports birds and insects — more biodiversity.

Common agroforestry trees in Kenya

• Faidherbia albida (aka 'meto' or winter-pod tree) — good with maize and beans because it drops leaves in rainy season and returns nutrients in dry season.
• Calliandra and Leucaena — fast-growing fodder trees for animals.
• Grevillea and Albizia — provide shade for coffee/tea (use carefully).
• Fruit trees: mango, avocado, citrus — give food and income.

Types of agroforestry systems (easy examples)

• Boundary trees: trees along the farm fence for wood and privacy.
• Alley cropping: rows of trees with crops planted between the rows.
• Home garden: many fruit and kitchen trees near the house.
• Fodder trees with animals: trees pruned for animal feed (e.g., Calliandra).

Simple diagram — Alley cropping

How to start agroforestry (easy steps)

1. Choose the right trees for your land and what you need (food, fodder, shade).
2. Plant seedlings at the correct spacing (ask local extension officer — spacing depends on tree type).
3. Protect young trees from animals and fire by fencing or tree guards.
4. Prune trees regularly so they don’t take too much water or shade the crops.
5. Use mulching to keep soil moist and add organic matter.

Good to know — tips and warnings

• Some trees (like eucalyptus) use a lot of water — avoid in very dry places.
• Don’t plant trees too close to crops at first — they need space to grow roots.
• Ask your local extension officer or tree nursery for seedlings that grow well in your area.

Quick activity (in class or at home)

Walk around a farm or your compound. List three trees you see. For each tree, write one way it helps the farm (e.g., shade, fruit, wood, soil protection).

Remember: Agroforestry helps farmers keep the land healthy and earn more. It is a smart way to conserve the agricultural environment in Kenya.

Source idea: Kenyan smallholder farming practices and common tree species (ask local extension for details suited to your location).