Question

The micro-element available in soil with alkaline pH is:

• A. Zinc
• B. Copper
• C. Iron
• D. Molybdenum

Hint:

Micronutrient availability:
- Molybdenum: More available in alkaline soils.
- Zinc, Copper, Iron: More available in acidic soils.
- Boron: Available in moderate pH.

Answer 1

The Correct Option is D

Step 1: Understanding the Question:
This question tests knowledge of micronutrient availability in relation to soil pH.

Step 2: Detailed Explanation:
Molybdenum is the only micronutrient that is more available in alkaline soils (pH > 7).
It exists as molybdate (MoO$_4^{2-}$) in alkaline conditions.
Zinc (A), Copper (B), and Iron (C) are more available in acidic soils (pH 5-6).
Thus, molybdenum is the micro-element available in alkaline soil.

Step 3: Final Answer:
Thus, molybdenum is available in soil with alkaline pH, which corresponds to option (D).
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