Cranfield University

Loss of organic matter - Quiz

Answer each question below, then choose Check answers to see your score. You can reveal the correct responses after marking.

1 What is the most important component of soil?

Organic matter Earthworms Sand

2 What is organic matter?

The remains of soil organisms and other creatures Decayed plant and root material Both of the above

3 How do plants take in nutrients?

From organic matter which comprises nutrients in a form which plants can absorb Thanks to the gardener feeding them From sunlight and CO2

4 How does organic matter improve the soil?

It improves the soil structure, allowing spaces in the soil where air can penetrate It holds water in the soil Both of the above

5 Which situation provides the best organic matter?

Pine forest Grassland Arable farmland with added manure

6 Do levels of organic matter decline or improve when land is used for intensive farming?

They improve They decline They stay about the same

7 How can organic matter be increased in your garden soil?

By digging in well-rotted farmyard manure Leave it as lawn By adding artificial fertilisers

8 Why is crop rotation important for reducing the loss of organic material?

Sometimes, crops can be dug in as 'green manure' It makes farming more interesting It improves the range of nutrients in the soil

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