Abstract:
A field experiment was conducted at the Agronomy field. Sher-e-Bangla Agricultural
University, Dhaka from July 2013 to December 2013. The experiment consisted of two
factors: Factor A: Planting method viz. Rice transplanter (P
1
) and Conventional method
(112
) and Factor 13: Weeding viz. No Weeding (W
0
), Weeding at 20 DAT (W
1
), Weeding
at 35 DAT (W2
), Weeding at 50 DAT (W
3
), Two Weedings at 20 DAT & 35 DAT (W
4),
Two Weedings at 20 DAT & 50 DAT (W
5
), Two Weedings at 35 DAT & 50 DAT (W
6)
and Three Weedings at 20 DAT, 35 DAT & 50 DAT (W
7
), following split-plot design
with three replications. Rice transplanter required less time (91 days) for tiowering
whereas, conventional method required more time (103) days for flowering. The
maximum number of filled grains panicle" and minimum number of unfilled grains
panicl&' (170.82 and 27.83 respectively) were obtained from conventional method while
the minimum number of filled grains panicle' and maximum number of unfilled grains
panicle' from rice transplanter (158.31 and 41.61 respectively). Higher yield (5.3$ t ha')
was obtained from conventional method and lower yield (4.93 t hi') from rice
transplanter but they did not vary significantly. Uigher biological yield (12.92 t ha
1
) was
obtained from conventional method and the lower from rice transplanter (10.86 t ha'). In
case of weeding, the highest grain yield was obtained from W
1
(5.48 t ha') and lowest
from Wo (4.13 t ha'). In case of interaction between planting method and weeding, the
highest grain yield obtained from P
2W7
(5.82 t ha') and the lowest from P,W
0 (3.57 t ha
t)•
There was no significant difference among the treatments except PIWO, PIWI and
P2WO which showed significantly lower grain yield than others. As the conventional
transplanting incurs more labour, using rice transplanter and weeding either at 25 DAT or
35 DAT might be suggested.
Description:
A Thesis
Submitted to the Faculty of Agriculture,
Sher-e-Bangla Agricultural University, Dhaka,
in partial fulfilment of the requirements
for the degree of
MASTER OF SCIENCE (MS)
IN
AGRONOMY
