| Three years experiments were conducted during 2010-2012 in order to develop and testing for rice yield improvement and production cost reduction in Southern part of Thailand. The first two years, the experiment was conducted in Phatthalung Rice Research Center, and the third year in the farmer fields. The Split Plot in Randomized Complete Block design was employed comprising rice varieties as main plots and rice seed rate or spacing as subplots with 4 replications. Results in the research center found that, by direct seeding, Phitsanulok 2, a non-photoperiod sensitive variety, gave the highest yield when seeded at 20 kilogram per rai seed rate whereas the photoperiod sensitive variety, Chiang Phatthalung showed the highest yield when seeded at 15 kilogram... |
