Physical Environmental Variables (AQA A-Level Geography): Quizzes
📚Quizzes
Practise the questions
10 questions from this quiz
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Practise the questions
10 questions from this quiz
What range did annual agricultural growth rates vary between from 1961 to 2016?
What range did annual agricultural growth rates vary between from 1961 to 2016?
2.2% and 2.9%
What were the main drivers of agricultural output growth from 1961-1980?
What were the main drivers of agricultural output growth from 1961-1980?
Expanding agricultural land & irrigation
What has become the dominant driver of agricultural growth from 2001-2016?
What has become the dominant driver of agricultural growth from 2001-2016?
Total factor productivity
What is the forecasted annual agricultural productivity growth rate until 2050?
What is the forecasted annual agricultural productivity growth rate until 2050?
Around 2.3%
What are limiting factors in agriculture?
What are limiting factors in agriculture?
Conditions restricting where crops grow
Who developed the Optima and Limits Model?
Who developed the Optima and Limits Model?
McCarty and Lindberg
What characterises the optimum conditions zone in the Optima and Limits Model?
What characterises the optimum conditions zone in the Optima and Limits Model?
Maximum productivity, lowest costs
What happens in the transition zone of the Optima and Limits Model?
What happens in the transition zone of the Optima and Limits Model?
Costs increase, yields decrease
How have crops been modified to tolerate wider environmental ranges?
How have crops been modified to tolerate wider environmental ranges?
Hybridised or genetically modified
How do livestock compare to crops regarding environmental conditions?
How do livestock compare to crops regarding environmental conditions?
Livestock show greater resilience