. For paddy field
-In the irrigated area where soil pH is below 4.0 adding lime at 1.5 tons/rai is enough but at soil pH 4.0-4.5 the use of lime has to be abount 1 ton/rai
-In rainfed area where soil pH is below 4.0 lime has to be added at 2.5 tons/rai but at soil pH 4.0-4.5 the use of lime at 1.5 tons/rai is more appropriate
steps in revitalization of acid soil
1. after lime distribution, plough over
2. flood the water into the field (keep the flooded water in the field for 10 days)
3. drain the water to wash off acidity
4. flood water into the field again for cultivation