Question

organic material provides nitrogen for plants. which soil component contributes the most nitrogen to plants?
○ clay
○ humus
○ sand
○ silt

Explanation:

To determine which soil component contributes the most nitrogen to plants, we analyze each option:

• Clay: Primarily a mineral component, holds nutrients but isn't a main nitrogen source from organic matter.
• Humus: Decomposed organic material, rich in nutrients including nitrogen, providing it to plants.
• Sand: A mineral particle, has little organic content or nitrogen contribution.
• Silt: Mineral - based, like sand and clay, not a primary nitrogen source from organic matter.

So, humus is the soil component that contributes the most nitrogen to plants.

Answer:

B. humus