Composition of Soil (Leaving Cert Geography): Quizzes
📚Quizzes
Practise the questions
12 questions from this quiz
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Practise the questions
12 questions from this quiz
How long does it take for 1 centimetre of soil to develop?
How long does it take for 1 centimetre of soil to develop?
Up to 400 years
What percentage of soil is made up of mineral matter?
What percentage of soil is made up of mineral matter?
45%
What percentage of soil is organic matter?
What percentage of soil is organic matter?
5%
What is parent material?
What is parent material?
Original rock from which soil develops
What is humus?
What is humus?
Dark substance from decomposed litter
Which of these is NOT a function of humus?
Which of these is NOT a function of humus?
Supplies oxygen to plant roots
What break down plant litter to form humus?
What break down plant litter to form humus?
Microorganisms
How do earthworms help soil health?
How do earthworms help soil health?
Mix humus & loosen soil structure
What percentage of healthy soil is air?
What percentage of healthy soil is air?
25%
Which nutrients does air supply to soil?
Which nutrients does air supply to soil?
Oxygen and nitrogen
What percentage of soil volume should water ideally make up?
What percentage of soil volume should water ideally make up?
25%
How much water can soil hold per acre?
How much water can soil hold per acre?
Up to 9,000 tonnes