FORESTRY
SOIL SCIENCE
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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A gardener wants to add humus to his soil because it contains a lot of nutrients and helps retain water. What does humus form from?
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Sand
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Rocks and minerals
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Decayed animals and plants
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Volcanic lava
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Explanation:
Detailed explanation-1: -Humus contains important nutrients needed for plant growth, including nitrogen. And it’s not just that humus contains nitrogen, it provides it in a form that is highly usable for plants. Humus also gives soil the necessary structure and a crumbly and loose texture so oxygen can get in and reach the plant roots.
Detailed explanation-2: -The uppermost layer of the soil is called topsoil and this layer contains humus, plant roots, and living creatures. The more humus found in topsoil, the more nutrient rich the topsoil and the better the conditions for growing plants.
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