Abstract:
A field experiment was conducted at Sher-e-Bangla Agricultural University, Dhaka during
the period from October-2021 to February-2022 in Rabi season, to study the growth and
yield of white maize as influenced by earthing up practices and application methods of
nitrogen fertilizer. The experiment consisted of two factors, and followed split plot design
with three replications. Factor A: Earthing up practices (2) viz: E
0
= No earthing up E
1
=
Earthing up at 45 DAS and Factor B: Application method of nitrogen fertilizer (3) viz: N
1
=
Side dressing at 85 DAS, N
2
= Two splits of N-50% at 45 DAS + 50% at 85 DAS and N
3
=
Three splits of N-33% at 45 DAS +33% at 65 DAS + 33% at 85 DAS. The analysis of
various parameter data revealed significant differences in maize growth and yield, as a
result of earthing up practices and different application method of nitrogen fertilizer and
their combination treatment. In the case of different earthing up practices, the lowest grain
yield (6.86 t ha
-1
) was observed in E
0
treatment. Whereas applying earthing up practices at
45 DAS (E
1
) gave the highest cob length (21.50 cm), cob circumference (18.19 cm), rows
cob
-1
(14.04), grains row
-1
(27.88), total grains cob
-1
(392.00), 1000 grain weight (298.33
g) and grain yield (7.60 t ha
-1
). Among different application methods of nitrogen fertilizer,
the highest cob length (21.99 cm), cob circumference (18.66 cm), rows cob
(15.47), grains
row
1
-1
(28.27), total grains cob
) were observed in N
3
-1
-1
(437.48), 1000-grains (311.67 g) and grain yield (8.10 t ha
treatment. In the case of combination, E
1
N
3
treatment combination
gave the highest cob length (22.66 cm), cob circumference (19.16 cm), rows cob
(15.67),
grains row
-1
(28.66), total grains cob
-1
(449.10), 1000 grains (331.67 g) and grain yield
(8.50 t ha
-1
) of white maize. Therefore, it was suggested that cultivating of white maize
through applying earthing up practice at 45 DAS along with three splits application of
nitrogen fertilizer @ 33% at 45 DAS +33% at 65 DAS + 33% at 85 DAS would help to
influenced plant growth and increase its ability to enhanced better yield production of white
maize compared to other treatment combinations.
Description:
A Thesis
Submitted to the Faculty of Agriculture
Sher-e-Bangla Agricultural University, Dhaka,
in partial fulfillment of the
requirements for the degree of
MASTER OF SCIENCE
IN
AGRONOMY
