Abstract
The study included three experiments, which were carried out during October 2015 to January 2018 at
the Tuber Crops Research Sub-Centre, Bangladesh Agricultural Research Institute (BARI), Bogura,
Bangladesh. The experiment 1 was conducted during 2015-2016 and 2016-2017 to investigate the
growth, green pod and seed yields of pea as influenced by sowing date and spacing. The experiment
consisted of three sowing dates viz. 27 October, 10 November and 24 November and four row spacings
viz. 20 cm, 30 cm, 40 cm and broadcast method. The experiment was laid out in a spilt plot design with
three replications in both the years. In 2015-2016, the results indicated that among the sowing dates
considering the yield and yield contributing characters, 10 November sowing produced the highest
green pod (5.25 t ha-1), green stover (4.46 t ha-¹), pod biological (9.71 t ha-1), seed (1.51 t ha-¹), dry stover
(1.58 t ha-1) and seed biological yield (3.00 t ha-¹) followed by green pod (5.05 t ha-1), green stover (4.37 t
ha-¹), pod biological (9.42 t ha-1), seed (1.40 t ha-1), dry stover (1.53 t ha-¹) and seed biological yield (2.93 t
ha-1) of 24 November sowing date. In 2016-2017, the highest green pod yield (5.48 t ha-1), green stover
yield 4.60 t ha-1), pod biological yield (10.09 t ha-¹), seed yield( 1.53 t ha-¹), dry stover yield (1.65 t ha-¹)
and seed biological yield (3.27 t ha-¹) were obtained from 10 November sowing followed by green pod
yield (5.32 t ha-1), green stover yield (4.54 t ha-¹), pod biological yield (9.72 t ha-¹), seed yield (1.50 t ha-1),
dry stover yield(1.60 t ha-¹) and seed biological yield (3.18 t ha-¹) of 24 November sowing date.
Therefore, from 10 November to 24 November sowing is the best time for pea production under Bogura
condition. In 2015-2016, among the row spacings 20 cm apart row gave the highest green pod yield (6.46
t ha-¹) and seed yield (1.78 t ha-¹). Among the row spacings 20 cm apart row gave the highest green pod
yield (6.61 t ha-1) and seed yield (1.74 t ha-¹) in 2016-2017. Combined effect of sowing date and row
spacing crop sown on 10 and 24 November at 20 cm spacing were the most suitable combination to give
the highest pod yield, seed yield, stover yield and biological yield of pea in both the years. Pea
produced the highest yield when it was sown in rows rather than broadcast method under the density
of 900000 plants ha-¹ in both the years. The experiment 2 was conducted during 2016-2017 to find out
the optimum dose of boron and phosphorus for the successful production of pea. The experiment
comprised four levels of boron viz. 0, 1.0, 1.5 and 2.0 kg B ha-1 and five levels of phosphorus viz. 0, 16,
20, 24 and 28 kg P ha-1. The experiment was laid out in a factorial Randomized Complete Block Design
with three replications. The results indicated that among the P levels, 24 kg ha-1 gave the maximum
green pod (7.10 t ha-1), green stover (5.98 t ha-1), pod biological (13.09 t ha-¹), seed (1.93 t ha-¹), dry stover
(2.14 t ha-1) and seed biological yield (4.07 t ha-¹) of pea. The application of 1.5 kg B ha-¹ produced the
highest green pod (6.89 t ha-1), green stover (5.76 t ha-1), pod biological (12.66 t ha-1), seed (1.94 t ha-1),
dry stover (2.15 t ha-¹) and seed biological yield (4.10 t ha-1) of pea. Combined effect of 1.5 kg B ha-¹ and
24 kg P ha-1 gave the highest green pod yield (7.60 t ha-¹), seed yield (2.08 t ha-¹) and nodule production
of pea. The experiment 3 was conducted during 2017-2018 to evaluate the effects of irrigation and
nitrogen for enhancing the productivity and profitability of pea. The experiment consisted five
irrigation treatments viz. no irrigation, irrigation at vegetative stage (15 DAS), irrigation at flowering
+
stage (30 DAS), irrigation at pod developing stage (45 DAS) and irrigation at vegetative stage (15 DAS)
pod developing stage (45 DAS) and five levels of nitrogen viz. 0, 20, 30, 40 and 50 kg N ha-¹. The
experiment was laid out in a spilt plot design with three replications. The application of irrigation at
flowering stage produced the highest green pod (7.11 t ha-¹), green stover (5.99 t ha-¹) and biological
yield (13.18 t ha-¹) followed by green pod (7.03 t ha¹), green stover (5.87 t ha-¹) and biological yield
(12.91 t ha-¹) of no irrigation treatment. Among the nitrogen levels, 30 kg N ha¹ gave the maximum
green pod (6.05 t ha-1), green stover (5.11 t ha-1) and biological yield (11.16 t ha-¹) of pea. Combined effect
of irrigation at flowering stage and fertilization with 30 kg N ha-¹ gave the highest green pod yield (7.57
t ha¹), green stover yield (6.19 t ha-1) and biological yield (13.76 t ha-1) of pea. According to cost and
return analysis, among all the combinations, no irrigation and fertilization with 30 kg N ha-¹ was
best combination for enhancing gross margin, BCR, both green pod and seed yield along with seed
protein content. Irrigation was not found to be required for cultivation of pea cv. BARI Motorshuti-3.