The experimental design was 2x5 Factorial in CRD with 10 treatments and 4 replications in an experimental tray. Consists of 2 factors 1) The amount of calcium silicate for seed mix include 0 and 4 grams per rice seed 20 grams. 2) Rice used include test Khao Dawk Mali 105 Pathum Thani 80 Homsuphanburi RD 49 and RD 6.