The investigation was carried out on jowar crop with the variety CSH-1 in the 'A' block of the Agronomy Research Farm. Bhubaneswar during the winter season of the year 1968-69 in a sandy loam soil of average fertil ity status with eight treatments and three replications in a randomised block design. Afalon [N-(3, 4-dichlorophenyl)-Nl-methoxy-Nl-methYI urea] @ 1.0 kg a e./ha, Tafazine 50 W [Simazine i e, 2-chloro 4, 6-bis-(ethyl amino)-s-triazine] @ 1.0 kg a.e /ha and Na salt of 2, 4-0 @ 1.68 kg a.e.jha were tried aione and in combination with one hoeing and earthing comprising of six herbicidal treatments. The other two treatments 'Cu Itivators' practice' (Two hoeings, two weedings and two earthings) and un-weeded control. All the herbicides were tried as pre-emergence sprays, immediately on the next day of sowing mixing in water @ 1124 litres/ha. The salient results obtained are given below:

1. Afalon and Tafazine SOW appeared to have no adverse effect on germination. Na salt of 2, 4·0 significantly reduced germination over all the rest of the treatments.

2. All the treatments Significantly reduced the weed population over un-weeded control. Afalon and Tafazine 50 W when supplemented with one hoeing and earthing recorded the minimum weed population count.

3. Maximum grain yield/ha was recorded with Afalon, whensuoolemented with one hoeing and earthing.