Book of Extended summaries ISDA

International Conference on Reimagining Rainfed Agro-ecosystems: Challenges & Opportunities
during 22-24, December 2022 at ICAR-CRIDA, Hyderabad
legumes including premature shedding of flower and pod and thus increasing seed yield,
exclusively established in case of black gram (Banerjee et al., 2021b). Against this background,
a two-year experiment was framed with an objective to evaluate the crucial and diverse role of
the Co, K and B on growth, yield and quality of black gram.
Methodology
A field experiment was conducted in A-B Block (District Seed Farm), B.C.K.V., Kalyani, West
Bengal, India during the subsequent spring-summer seasons of 2020 and 2021. Black gram
(variety: Pant Urd 31) was sown. The experiment was laid out in a split-split plot design
replicated thrice with two sowing dates (March first week and March third week) in main plot,
two soil application levels of cobalt (No cobalt and cobalt at 4 kg ha −1 ) in sub-plots and five
foliar sprays of K and B at flower initiation stage in various combinations (no spray, spray of tap
water, 1.25%K, 0.2%B and1.25%K + 0.2%B) in sub-sub plots.
Results
The pooled analysis of the data has shown that March1 st week sown crop exhibited a higher
growth rate compared to the March 3 rd week sown crop, thisresulted in higher production. The
Co application as basal dose recorded significantly higher growth and yield attributes of black
gram over without application of Co. Foliar K+B application significantly increased (p≤0.05) dry
matter accumulation (178.7 g m -2 ), number of root nodules plant -1 (43.6), crop growth rate
(CGR: 4.76) and no. of pods plant -1 (41.2), which resulted in higher seed yield (1481.4 kg ha -1 .
Seed yield of black gram was found to be a linear function of number of pods per plant,
explaining about 96.59 and 93.98 % variations respectively during 2020 and 2021.
Growth, yield and quality of black gram as influenced by date of sowing, soil application
and foliar nutrition during spring-summer season (pooled)
Treatment
Dry matter
(g m -2 )
Number of
Nodules plant -1
CGR
(g m -2 day -1 )
Pods
plant -1
Seed yield
(kg ha -1 )
March 1 st week 170.3 41.4 4.44 33.8 1251.9
March 3 rd week 162.1 37.9 4.35 30.9 1120.7
S.Em(+) 0.17 0.08 0.01 0.29 6.15
L.S.D. (P=0.05) 1.04 0.51 0.09 1.71 17.94
No cobalt 161.9 37.7 4.28 27.7 1095.4
Cobalt at 4 kg ha -1 170.5 41.6 4.46 34.0 1277.2
S.Em(+) 0.45 0.12 0.03 0.33 4.25
L.S.D. (P=0.05) 1.86 0.49 0.10 1.30 16.59
Sustainable soil management for resilient rainfed agro-ecosystem: conservation agriculture, organic farming,
INM, soil-microorganisms-plant interactions
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