GENERAL ANATOMY
NERVOUS SYSTEM
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Plants grow best when the soil is slightly acidic.
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Plants grow best when the soil is slightly basic.
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Plants grow best when the pH range is between 4 and 10.
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Plants grow best when the pH range is between 5 and 7.
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Detailed explanation-1: -The pH range of 5.5-7 is highly suitable for plant growth and hence such a soil is considered fertile. Thus the correct answer is option D.
Detailed explanation-2: -The pH range 5.5–6.5 is optimal for plant growth as the availability of nutrients is optimal.
Detailed explanation-3: -Most nutrients that plants need can dissolve easily when the pH of the soil solution ranges from 6.0 to 7.5. Below pH 6.0, some nutrients, such as nitrogen, phosphorus, and potassium, are less available.
Detailed explanation-4: -The midpoint, pH 7, denotes a neutral soil, which is neither acid or alkaline. Anything below pH 7 is acidic (or ericaceous), and the lower the pH number, the more acidic the soil is.
Detailed explanation-5: -The best way to increase the pH in soil is using a lime-based compound such as dolomite lime and agricultural lime. However, other methods such as using baking soda, crushed eggshells, or wood ashes can also be used.