Life in soil-B6 OCR
- Created by: Eleanor Durham
- Created on: 02-05-17 21:42
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- Life in soil
- THE COMPONENTS OF SOIL
- Contains mineral particles of different sizes
- sandy soil has larger particles than clay soil
- loam contains
- a mixture of clay and sand
- a large amount of humus (decomposed animal and plant waste)
- Humus content can be found using a bunsen burner
- Air content can be found seeing how much water is needed to fill the air space
- water content can be found by evaporating the water
- Larger particles= higher air content and permeability
- Larger amount of humus= holds more water and air
- Contains mineral particles of different sizes
- LIVING IN SOIL
- Humus in soil is important because it will
- decompose to release minerals
- increase the air content of the soil
- Earthworms are important because they
- bury organic material for decomposition by bacteria and fungi
- aerate and drain the soil
- mix up soil layers
- neutralise acid soil
- Aeration and draining by earthworms will allow organisms to respire aerobically
- neutralising acid soils is important because otherwise plants cant grow
- mixing up soil layers means dead material is decomposed
- earthworms first understood by Charles Darwin
- Humus in soil is important because it will
- THE COMPONENTS OF SOIL
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