Vergara - 1976 - Physiological and morphological adaptability of ri

NITROGEN RESPONSE or RIPE IN TROPKTAL coimiritiiks 531
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l-l. Xitrogerl response of four varieties grown under
upland conditions at three dates of seeding. with solar radiation
total for reproductive 1nd ripening period and
minthll and soil moisture tension in the experimental
site related to stage of crop growth. IRRI. 1973 wet
semtun.
seeond (June S) seeding. were nitrogen responses to 6O kg Nfha found significant
(Fig. 14). At the second seeding date C-22 lodged early at 120 kg N/ha
and produced significantly‘ lower yield than at 60 kg Nfha. Because of poor
moisture supply (40 to 45 eh soil-moisture tension) in the first week after