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The graph shows the area of land in the UK used to grow barley, and its yield between 1930 and 2000 - Scottish Highers Biology - Question 13 - 2023
Question 13
The graph shows the area of land in the UK used to grow barley, and its yield between 1930 and 2000. (a) Use values from the graph to describe the changes in the ar... show full transcript
Worked Solution & Example Answer:The graph shows the area of land in the UK used to grow barley, and its yield between 1930 and 2000 - Scottish Highers Biology - Question 13 - 2023
Step 1
Use values from the graph to describe the changes in the area of land used to grow barley from 1950 to 2000.
Answer
The area of land used to grow barley increased from 750 thousand hectares in 1950 to 2350 thousand hectares in 1980. This represents significant growth in barley production over the years. However, following 1980, the area decreased to 1150 thousand hectares by 2000.
Step 2
Step 3
Calculate the percentage increase in the mass of cattle produced between 2000 and 2020.
Answer
To calculate the percentage increase:
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Identify the mass of cattle produced in 2000: 960 (in 10^6 kg).
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Identify the mass of cattle produced in 2020: 1104 (in 10^6 kg).
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Use the formula for percentage increase:
ext{Percentage Increase} = rac{(1104 - 960)}{960} imes 100
ext{Percentage Increase} = rac{144}{960} imes 100 = 15\%
Step 4
Use information in the table and bar chart to calculate the total mass of feed required for poultry production in the UK in 2020.
Answer
To calculate the total mass of feed required for poultry production in 2020, we first find the feed conversion ratio for poultry, which is 5. This means that for every kg of poultry produced, 5 kg of feed is required. Given that 2348 x 10^6 kg of poultry is produced in 2020:
Total feed required = Mass of poultry produced × Feed conversion ratio Total feed required = 2348 × 5 = 11,740 x 10^6 kg.
Step 5
Using information in the bar chart explain why eating poultry or pigs reduces the impact on food security compared with eating cattle.
Answer
Eating poultry or pigs reduces the impact on food security because both have a lower feed conversion ratio than cattle. This means that less feed is required to produce a kg of meat. The lower the feed conversion ratio, the more efficient the use of food resources, leading to better sustainability in food production.