Unit 3 Vocabulary

3. breaks (shelterbelts): Rows of trees or bushes planted to block the wind. They protect soil from blowing away.
4. When land becomes dry and can’t support plants. It often happens after overuse.
7. Cutting down too many trees. This can cause soil erosion and less rain.
8. Using too much plant food. It can hurt the soil and pollute water.
9. When too much salt builds up in the soil from irrigation. It makes it hard for plants to grow.
11. Plowing along the curves of hills. This helps slow down water and stop erosion.
12. When animals eat too much grass, leaving the soil bare and weak.
13. Growing different crops together. This helps soil stay healthy and stops pests.

1. Bringing water to crops using pipes or canals. It helps in dry areas but can cause problems if overused.
2. Building cities and roads. It covers soil with cement and stops water from soaking in.
5. Flat steps built into hills to stop soil from washing away.
6. Farming without digging the soil too much. It protects the soil from erosion.
10. Changing what crop you grow each season. This keeps the soil healthy.