Table 4. Suggested guideline for liming of pond based on pH and texture of pond soil
pH of pond soil	Lime requirement (kg/ha of CaCO3)
	Heavy loams	Sandy loam	Sand
	or clays
4.0-5.0	3,000	2,000	1,000
5.0-6.0	1,800	1,200	600
6.0-6.5	1,500	1,000	500
6.5-7.5	600	400	200
Data source:  Saha et al. (2003)