A student carried out an investigation to see if nutrients, N, P, K, affected the growth rate of grass and barley plants - Leaving Cert Agricultural Science - Question d - 2021
Question d
A student carried out an investigation to see if nutrients, N, P, K, affected the growth rate of grass and barley plants. The student recorded the shoot length of mu... show full transcript
Worked Solution & Example Answer:A student carried out an investigation to see if nutrients, N, P, K, affected the growth rate of grass and barley plants - Leaving Cert Agricultural Science - Question d - 2021
Step 1
State one reason why the student calculated the mean shoot length of multiple plants in the investigation.
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Answer
Calculating the mean shoot length provides more accurate results or more fair results, minimizing the impact of outliers.
Step 2
Identify which treatment group had the greatest effect on plant growth.
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Answer
All nutrients (NPK) had the greatest effect on plant growth, as indicated by the highest average shoot length.
Step 3
Outline one way in which the student could have measured the shoot length of the barley / grass plant.
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The student could cut the shoot at the base of the plant and measure the length with a ruler.
Step 4
Compare slurry and farmyard manure under the following headings.
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Composition: Slurry is a liquid (urine & dung), while farmyard manure is solid (dung, straw & urine).
Organic matter content: Slurry has lower organic matter content than farmyard manure.
Storage: Slurry is stored in a tank (under slats), while farmyard manure is stored in a dung stead or manure pit or slab or dung heap.
How it is applied to the land: Slurry is applied using a slurry tanker or umbilical cord, while farmyard manure is applied using a muck or side or dung spreader.
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