Grade 9 Questions & Answers
What is soil pollution?
Soil pollution refers to the contamination of soil with harmful substances called soil pollutants or soil contaminants.
State the five causes of soil pollution (5mks)
Soil pollution is cause by 5 major factors: They include:
- Excessive use of artificial fertilizers.
- Excessive use of agrochemicals.
- Plastic waste materials.
- Chemical containers.
- Industrial wastes.
Write down the suitable methods that can be used to control soil pollution? (7mks)
- Use of correct amount and correct type of both artificial fertilizers and agrochemicals.
- Recycling of plastic waste materials into other useful products.
Reusing of plastic waste materials for other agricultural activities such as using plastic bottles in drip irrigation helps to conserve water. - Proper disposal of plastic waste materials and chemical containers.
- Treatment of industrial wastes before discharge.
- Practicing organic farming which involves growing of crops and rearing of livestock without using agrochemicals.
- Planting of trees.
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