1. to use the rice irrigation district-pH value of soil less than 4.0, use cement rate 1.5 tons/acres-pH value of soil between 4.0-4.5, use at a rate of 1 ton/Rai. District agricultural storm water-soil pH values of less than 4.0, use mortar in the rate of 2.5 tons/acres-pH value of soil between 4.0-4.5-use Rai 1.5 tons of cement and a rate adjustment steps tajine sour. After sowing to do the plowing and release water, soaked in NA about 10 days and then drained off to wash the toxins and imprisoned water waiting for new lace black.
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