A soil sample has pH 9. Which is a more suitable way to improve its condition for crops?
Answer and explanation
Correct answer: Carefully adding organic matter
A pH of 9 indicates that the soil is alkaline. Adding slaked lime or sodium hydroxide would increase alkalinity, and soap solution would also be unsuitable. Properly decomposed organic matter can gradually improve soil structure and, through biological decomposition, help moderate excessive alkalinity when used with soil testing and agricultural advice. Therefore option A is the most suitable choice among those given.
Frequently asked questions
What is the correct answer to this question?
Carefully adding organic matter
Why is this the correct answer?
A pH of 9 indicates that the soil is alkaline. Adding slaked lime or sodium hydroxide would increase alkalinity, and soap solution would also be unsuitable. Properly decomposed organic matter can gradually improve soil structure and, through biological decomposition, help moderate excessive alkalinity when used with soil testing and agricultural advice. Therefore option A is the most suitable choice among those given.
Which subject and chapter does this question cover?
This is a Class 10 Science question. Chapter: Chemical Substances – Nature and Behaviour. Topic: Acids, Bases, and Salts.
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