2. MATERAILS AND METHODSThis study

2. MATERAILS AND METHODS
This study was conducted at King Mongkut’s Institute
of Technology Ladkrabang, Chumphon Campus, Thailand
(Latitude 10°00’ 30.05” N Longitude 99°25’ 45” E
Altitude 17.84 m above the sea level) from July to
November, 2010. Two varieties of upland rice:
Nangdam and Lebnok seeds were produced during the
rainy season. The land was ploughed and disc harrowed and
leveled before sowing the seeds. Four seeds of upland rice
were sown per hole with spacing of 30cm within rows and
30 cm between rows. The plants were thinned to three
plants per hole after 14 DAG. The total area of each plot
was 10m2. The fertilizer (15N-15P-15K) was applied
twice at 25 and 45 DAG. Weeds were eliminated by using
hoes twice at the age of 20 and 40 DAG. Harvesting was
done when the all grain maturity. The collected data were
plant high, days to booting, days to 50% flowering, days
to harvesting of the grain, number of panicle per tiller,
panicle length, grain yield, number of grains per panicle,
number of perfect grains, number of empty grains, number
of imperfect grains, number of green grains, chalky grain,
breaking grain, grain size and 1,000 grain weight. After
threshing, the grains were sun-day, sieved and weighted
after the measurement of the moisture content. The grain
yields were determined for corresponding weight of
standard moisture of 14%. Each test was done with four
replications. Average of daily rainfall, minimum and
maximum temperatures from July to November, 2010 was
received from the Tha Ta Pao Agrometeorological Station,
Muang Chumphon, Chumphon, Thailand. All data were
analyzed using the analysis of variance and means
separated by Duncan’s Multiple Range Test (DMRT) at
the 5% level of significance.