Abstract:
The yield potential, nitrogen response and the anicillary characteristics of
the early rice culture, 24-20 that matured in 75-80 days under Vellayani conditions
were studied in relation to four levels of nitrogen fertilization.
The maximum grain yield of 5559 Kg. per hectare was obtained at 90 Kg
nitrogen level. The maximum productivity of the early culture was 68.8 Kg. per
hectare per day indicating that a a moderately higher grain yield could be obtained
with varieties of 80 day duration. The optimum nitrogen requirement was found
to be 82.35 Kg. per hectare. The important role of very early varieties in the context
of limited availability < - f nitrogenous fertilizers is also indicated.
