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The Daffodil Plants Grow Best in a Soil Having a Ph Range of 6.0 to 6.5. If the Soil in a Garden Has a Ph of 4.5, Which Substance Needs to Be Added to the Soil in Order to Grow Daffodils? (A) Salt (B) Lime (C) Sand (D) Compost - Concept of Ph Scale

The daffodil plants grow best in a soil having a pH range of 6.0 to 6.5. If the soil in a garden has a pH of 4.5, which substance needs to be added to the soil in order to grow daffodils?
(a) salt
(b) lime
(c) sand
(d) compost

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Solution

lime
If the pH of the soil is 4.5, then it is highly acidic. Thus, soil should be treated with a base, such as quick lime (calcium oxide) or slaked lime (calcium hydroxide). These bases react with the excess acid present in the soil and neutralises it. Thus, the pH of the soil is increased, making it suitable for growing daffodils.

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