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What is bench line or berm

What do you mean by the term bench line or berm? Explain briefly. Also state the types of ponds based on the utilization?

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When the production pond is more than 0.5ha, a platform similar to space between bund and water region must be made available.  This region is termed as berm or bench line.

The kinds of ponds based on utilization are: Hatching pit, Nursery ponds, Rearing ponds and the stocking ponds.

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