Abstract:
An investigation was conducted at the Rice Research Station Paltambi
during the early kharif seasons of 1972 and 1973 to find out the period of
weed competiiion that an upland rice crop could stand without adverse effect on
yield, The results revealed that the weed competition was more critical during
the early vegetative phase of the crop and that weed free conditions favoured
higher grain production. The longest period of weed competition that the upland
rice could tolerate was 30 days from sowing without adverse effect on, yield.
