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The use of glyphosate weedkillers, such as Roundup™, has recently been authorised by the EU for a further five years - Leaving Cert Agricultural Science - Question c - 2019
Question c
The use of glyphosate weedkillers, such as Roundup™, has recently been authorised by the EU for a further five years. (i) Describe two situations in agriculture in ... show full transcript
Worked Solution & Example Answer:The use of glyphosate weedkillers, such as Roundup™, has recently been authorised by the EU for a further five years - Leaving Cert Agricultural Science - Question c - 2019
Step 1
Describe two situations in agriculture in which such broad-spectrum weedkillers might be used.
Answer
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Before reseeding or pre-harvesting cereals: Glyphosate weedkillers can be effectively used to manage weed populations before sowing or harvesting crops. This ensures that the new seeds are sown in a weed-free environment, which promotes better germination and crop yields.
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Controlling invasive species: In agricultural landscapes, glyphosate can be applied to manage invasive weed species that compete with crops for nutrients, water, and sunlight. This helps in sustaining native biodiversity and protecting the crop's growth.
Step 2
List four precautions that should be taken when using chemical sprays in agriculture, and give a reason for each precaution.
Answer
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Use a certified operative: It is essential that trained professionals apply chemical sprays to ensure they are used safely and effectively, minimizing the risk of accidents.
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Do not apply on windy days or after heavy rain: This precaution prevents the spread of chemicals beyond the target area, reducing the risk of environmental contamination.
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Safe disposal of containers: Proper disposal prevents environmental pollution and reduces the risk of accidental exposure to chemicals.
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Apply at the correct rate: Ensuring the right dosage is applied minimizes the risk of crop damage and reduces chemical waste, promoting sustainable agricultural practices.