Abstract:
With the increasing cost of labor and water shortage, the farmers are forced to look for substitute to
present existing transplanting system of cultivation to drum seeded rice, where labor need is reduced by
more than 20% but, weed infestation and low nitrogen use efficiency are the major problems. Because
of the above problems a field experiment was conducted at the College of Agriculture, Rajendranagar,
Hyderabad, during Rabi 2020-21 and 2021-22 to study the effect of nitrogen levels and weed
management practices on drum-seeded rice. The field trial consisted of 16 treatments with four weed
management practices and four nitrogen levels laid out in a factorial randomized block design. During
both years, out of all weed practices, energy indices were found to be higher with Pretilachlor 6% +
Pyrazosulfuron-ethyl 0.15% GR 615 g ha -1 as pre-emergence followed by mechanical weeding at 25
and 50 DAS (W 4 ) at par with Pretilachlor 6% + Pyrazosulfuron-ethyl 0.15% GR 615 g ha -1 as pre-
emergence followed by penoxsulam 1.02% + cyhalofop butyl 5.1% OD 120 g ha -1 as post-emergence
(W 2 ). Among nitrogen levels, 125% RDN (N 4 ) which was statistically comparable with 100% RDN
(N 3 ) registered higher.