Irrigated riceland contributes more
than 75% of total rice production although it accounts for about
55% of total rice area. Rice varieties with higher yield potential
must be developed to enhance the average farm yields of
irrigated riceland. Yield potential is defined as the yield of a
variety when grown in environments to which it is adapted;
with nutrients and water non-limiting; and with pests, diseases,
weeds, lodging, and other stresses effectively controlled