Table 4. Suggested guidelines for liming of ponds based on pond soil pH
pH of pond soil	Lime requirement (kg/ha)
	Calcium carbonate	Agricultural lime	Dolomite	Shell powder	Quick lime
4	1,500	1,660	1,700	1,920	1,380
4.5	1,250	1,390	1,420	1,600	1,150
5	1,000	1,110	1,130	1,280	920
5.5	750	830	850	960	690
6	500	550	570	640	460
6.5	250	280	280	320	230
% efficiency	100	90.2	88.3	78.2	108.5
Quick lime is prefered for quick and caustic action for soil treatment during pond preparation
Data source: Jena and Das (2006)