Science

3. When land becomes dry and can’t support plants. It often happens after overuse.
5. tillage Farming without digging the soil too much. It protects the soil from erosion.
6. Growing different crops together. This helps soil stay healthy and stops pests.
7. breaks Rows of trees or bushes planted to block the wind. They protect soil from blowing away.
8. Flat steps built into hills to stop soil from washing away.
9. rotation Changing what crop you grow each season. This keeps the soil healthy.
10. Building cities and roads. It covers soil with cement and stops water from soaking in.
11. When animals eat too much grass, leaving the soil bare and weak.

1. Cutting down too many trees. This can cause soil erosion and less rain.
2. When too much salt builds up in the soil from irrigation. It makes it hard for plants to grow.
4. overuse. Using too much plant food. It can hurt the soil and pollute water.
6. Bringing water to crops using pipes or canals. It helps in dry areas but can cause problems if overused.
9. plowing Plowing along the curves of hills. This helps slow down water and stop erosion.