EM Chapter 3 - Agriculture

2. A layer of natural or artificial material that is placed over the soil surface to reduce evaporation
6. Changing the slope of areas to make it flat for agriculture
9. A farming practice that includes crops and animal breeding
11. Rocks are broken down into smaller pieces by this process
15. A chemical used to kill pests
16. Chemical used to control insects
17. A type of soil that is a mixture of clay, silt and sand
18. The process where the oxygen in a water source is reduced due to algae overgrowth. This is caused by high nutrient levels in the water.
21. Farming that breeds animals for food or animal-related products
22. A system of supplying enough water to crops

1. Plants that are able to produce fertiliser due to nitrogen-fixing bacteria on their roots
3. A chemical used to kill weeds
4. When fertile land becomes a desert
5. Material derived from living organisms
7. Ability of an organism (plant) not to be affected by toxic substances
8. A microscopic organism that cause disease
10. A chemical used to kill or control fungi
12. Movement of soil particles and rock fragments due to wind or water
13. A practice where plants are grown in a controlled environment, without any soil, in water.
14. A plant growing in a place where it is not wanted
19. A technique to utilise maximum nutrients and water in the soil by growing crops between other crops
20. A type of farming where crops are produced for consumption such as maize or wheat