STUDIES ON EFFECT OF WEATHER ON TRADITIONAL PHOTOSENSITIVE PTB-L AND HIGH YIELDING JAYA VARIETIES BY CURVILINEAR TECHNIQUE AT PATTAMBI, KERALA

Abstract

A SlU d)' wa... cond ucted with tradition al photosensitive PTR-I an d hijrh )ield ina Jaya varieties of
net' j'rown duri n~ kharifcrop season in sanlly loem soil under rai n(C'tJ co nd ition at Pauambt.Th e a nalysis was based
on curvili near tech nique an d seasonal rain fall. max imum an d minimum temperatures a nd briahl hou rs ofsunsh ine
have been used.Th e stull )' enshit's determination of respo nse of yield to l1ilTercni ranees ofweather factor s. From (he
final cu rves de te rm ine d in till' IInnl)'si s it is also ru ~...ibl e 10 e S li m~ te yield for diffe rent mean values of the
weather factors
The stud) revealed that ramfull is not that important for Ja)·. variet y. It abo does not nenl la l'Je amount of su nshine
COmpDrN to PTD-1. For both va riet ies. a lUu imum temperature of 29-C appears ideal for opt imum
)it"ld