Abstract:
In studies on the critical periods of crop-weed competition a in short duration
rice variety 'Triveni,' carried out at the College of Agriculture, Vellayani, during
the second crop season of 1976-77, it was found that the critical period of crop-weed competition lies between 21 and 40 days after transplanting. During i his period, the
weed emergence and dry matter accumulation were maximum. At least a weed
free condition of 21 -30 days in the critical period of 21-40 days, is essential to obtain
good yields.
