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Explain the importance of soil for plant growth.
Answers (1)
Importance of soil for plant growth:
- Soil provides the point of anchorage for all the plants as the roots here extend outwards and downwards.
- Soil is the reservoir for water and minerals (raw material for photosynthesis) which are essential for all the metabolic activities of a plant.
- Roots of plants absorb oxygen diffused in soil for respiration purposes.
- Some plants have symbiotic relationships with bacteria and fungi in soil to fulfil their nitrogen requirements. E.g. mycorrhiza.
- Soil particles contain water, which moves through the plant via roots. It helps to maintain the cell size and serves as a raw material for photosynthesis. Photosynthesis is a process in which plants capture light energy to manufacture sugars.
- Soil helps in temperature modification during excessive hot or cold weather.
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