The role of dead organic matter in the soil is to
The role of dead organic matter in the soil is to
- A) Make the soil black.
- B) Increase the mineral salt content.
- C) Provide food for all living organisms
- D) Increase the acidity of the soil.
Correct Answer: B) Increase the mineral salt content.
Explanation
The question is asking about the role of dead organic matter in the soil. Dead organic matter refers to the remains of dead plants and animals that have decomposed and become part of the soil. Option A suggests that the role of dead organic matter is to make the soil black. While it is true that dead organic matter can contribute to the dark color of soil, this is not its primary role in the soil. Option B states that the role of dead organic matter is to increase the mineral salt content of the soil. This is the correct answer. Dead organic matter contains nutrients like nitrogen, phosphorus, and potassium that are essential for plant growth. As the organic matter decomposes, these nutrients are released into the soil, making it more fertile. Option C suggests that dead organic matter provides food for all living organisms. While it is true that dead organic matter can support the growth of microorganisms and other soil organisms, it is not its primary role in the soil. Option D states that the role of dead organic matter is to increase the acidity of the soil. This is incorrect. Dead organic matter tends to have a neutral or slightly acidic pH, and its decomposition does not significantly affect the acidity of the soil. In summary, the correct answer to the question is Option B, which states that the role of dead organic matter in the soil is to increase the mineral salt content. Dead organic matter contains nutrients that are essential for plant growth, and its decomposition releases these nutrients into the soil, making it more fertile.