Grade 7 Agriculture and Nutrition Notes

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Download Grade 7 Agriculture and Nutrition Notes.

CONSERVING RESOURCES.
1.1 Soil Pollution Control
• It is very important to human beings and animals to conserve the agricultural environment.
• This can be done by learning about soil pollution and how to control it when carrying out agricultural farming activities or practices.
• Soil pollution is the contamination of soil with harmful substances.
• The harmful substances in the soil are known as pollutants or contaminants

Causes of Soil Pollution in Framing.
• Excessive use of artificial fertilizers.
• These fertilizers introduce pollutants such as Nitrogen compounds and heavy metals into the soil which accumulate in the soil to toxic levels and become harmful to crops and soil living organisms.
• Excessive use of agricultural chemicals (agrochemicals) such as herbicides and pesticides.
• These chemicals become pollutants when they get into the soil. They accumulate into the soil and become toxic to soil living organisms.
• Throwing plastic wastes in the garden.
• Plastic wastes are not broken down by soil living organisms. They contaminate the soil and interfere with the growing crops or reduces agricultural space.
• Throwing Chemical containers.
• Chemical leftovers from these containers get into the soil and become pollutants. The pollutants accumulate to toxic levels and become harmful to the soil living organisms.

What is the effect of soil pollution?
It causes production of crops that are not safe for consumption or use by human beings. CONTROL OF SOIL POLLUTION
How can soil pollution be controlled in Farming?
Soil should be protected from pollution to make agricultural produce safe.
Safe soil pollution control practices are measures that are taken to reduce the pollutants in the soil.
Soil pollution can be controlled using the following methods:
Carry out farming practices in the proper way.
Use of correct types and amount of artificial fertilizer and agrochemicals.
Safe disposal of used agricultural chemical containers.
Safe disposal of plastic wastes, containers and straws.
Practicing organic farming which is the growing of crops and rearing livestock without using artificial fertilizers and agricultural chemical.
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