Rice is a major crop in the country, playing a vital role in national economy. Unusual rain is
mainly affecting the rice than the other crops with main impact on transplanting time. To find
out the solution of this problem, an experiment was carried out in split plot design with two
varieties as main plot and three dates of transplanting as sub plot factor with three replications
in 2010 and 2011 at Khumaltar. Variety Khumal 13 produced higher grain yield compared to
Kimma! 4 in both years. Significantly higher grain yield (6.6 t/ha) was found under tlurd date
of transplanting in 20 I 0 compared to frrst date of transplanti11g and statistically comparable
grain yield to second date. First date of transplanting resulted significantly higher grain yield
(7 .3 t/ha) compared with other dates in 2011. Onset and intensity of rainfall was erratic with
late rainfall in 20 I 0 and 87% more rainfall in 2011. Thus, development of wide adaptable
varieties and well advanced climate forecasting system is required to minimize the threats of
rainfall uncertainty for the food security and livelihood of country.

Rice is a major crop in the country, playing a vital role in national economy. Unusual rain is
mainly affecting the rice than the other crops with main impact on transplanting time. To find
out the solution of this problem, an experiment was carried out in split plot design with two
varieties as main plot and three dates of transplanting as sub plot factor with three replications
in 2010 and 2011 at Khumaltar. Variety Khumal 13 produced higher grain yield compared to
Kimma! 4 in both years. Significantly higher grain yield (6.6 t/ha) was found under tlurd date
of transplanting in 20 I 0 compared to frrst date of transplanti11g and statistically comparable
grain yield to second date. First date of transplanting resulted significantly higher grain yield
(7 .3 t/ha) compared with other dates in 2011. Onset and intensity of rainfall was erratic with
late rainfall in 20 I 0 and 87% more rainfall in 2011. Thus, development of wide adaptable
varieties and well advanced climate forecasting system is required to minimize the threats of
rainfall uncertainty for the food security and livelihood of country.