Liming is done to increase the pH value of pond water for intensive fish culture. What is the dose of lime required in kg/ha, if the pH of the pond bottom soil is less than 6.5?

Correct option is D

Liming is done to increase the pH value of pond water and soil. The recommended dose of lime for pond bottom soil is generally around 500 kg/ha when the pH is less than 6.5. Liming helps in maintaining the proper pH level for the growth of aquatic organisms in intensive fish culture. It is an essential practice to create a favorable environment for aquatic species in the pond.