Question

The soil pH considered to be productive for fish pond is

• A. 6.5-7.0
• B. 5.5-6.0
• C. 6.0-6.4
• D. 7.5-8.0

Hint:

Optimal soil pH for aquaculture is near-neutral (\(6.5\text{ to }7.5\)).
If pond soil is acidic, agricultural lime (\(\text{CaCO}_3\)) is added to raise the pH to this productive range.

Answer 1

The Correct Option is A

Step 1: Understanding the Concept:
Pond soil pH dictates the overall chemical environment, nutrient exchange, and microbial activity in an aquaculture system.
The acidity or alkalinity of the soil determines the solubility and availability of vital nutrients like phosphorus and nitrogen in the water column.

Step 2: Detailed Explanation:
A soil pH that is near-neutral to slightly alkaline is considered optimal for biological productivity in fish ponds.
A range of \(6.5\) to \(7.5\) (specifically \(6.5\text{--}7.0\)) is highly favorable.
At this pH level, nutrient lock-up is minimized, allowing phosphorus to remain in a soluble orthophosphate state.
Highly acidic soils (\(\text{pH} < 5.5\)) lock up nutrients and can lead to toxic conditions, while highly alkaline soils can limit nutrient availability.
Thus, the range of \(6.5\text{--}7.0\) is highly favorable and considered productive.

Step 3: Final Answer:
The soil pH considered to be productive for fish pond is \(6.5\text{--}7.0\).