Forgoing the fallow in Bangladesh’s stress-prone coastal deltaic environments: Effect of sowing date, nitrogen, and genotype on wheat yield in farmers’ fields.
Version: 1– Released: Wed Sep 27 05:16:49 CDT 2017
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Data Citation
If you use these data, please add the following citation to your scholarly references. Why cite?
Krupnik, T.J., Ahmed, Z.U., Timsina, J., Shahjahan, Md., Kurishi, A.S.M.A., Rahman, S. Miah, A.A., Gathala, M.K., McDonald, A.J. 2015. Forgoing the fallow in Bangladesh’s stress-prone coastal deltaic environments: Effect of sowing date, nitrogen, and genotype on wheat yield in farmers’ fields. Field Crops Research. 170: 1–7.
ID: DOI:10.1016/j.fcr.2014.09.019
Data Citation Details
SubtitlePerformance of new wheat genotypes under different sowing dates and nitrogen rates in southern Bangladesh, Rabi Season 2011-12, 2012-2013
Study Global IDhdl:11529/11084
AuthorsTimothy J. Krupnik (International Maize and Wheat Improvement Center); Zia Uddin Ahmed (International Maize and Wheat Improvement Center); Jagadish Timsina (Melbourne School of Land and Enviornment, University of Melbourne, Australia); Md. Shahjahan (International Maize and Wheat Improvement Center); A.S.M. Alanuzzaman Kurishi (International Maize and Wheat Improvement Center); Azahar A. Miah (International Maize and Wheat Improvement Center); B.M. Saidur Rahman (International Maize and Wheat Improvement Center); Mahesh K. Gathala (International Maize and Wheat Improvement Center); Andrew J. McDonald (International Maize and Wheat Improvement Center)
ProducerInternational Maize and Wheat Improvement Center (CIMMYT) Logo; International Rice Research Institute (IRRI) Logo; International Food Policy Research Institute (IFPRI) Logo
Production Date2014
Production PlaceBangladesh
Funding AgencyUSAID and Bill & Melinda Gates Foundation (BMGF)
DistributorInternational Maize and Wheat Improvement Center (CIMMYT) Logo; International Rice Research Institute (IRRI) Logo; International Food Policy Research Institute (IFPRI) Logo
Distributor ContactTimothy J. Krupnik (CIMMYT Bangladesh),
Distribution Date2017
DepositorAshok Rai
Deposit DateSeptember 27, 2017
Description and Scope

Working with 64 farmers ineight production environments, we examined yield response to three genotypes, BG25 and BG27 (with salinity - and heat - tolerant traits) and BG21 (local check), across a gradient of sowing dates, grouped as ‘early’ (sown before 15 December) and ‘late’ (after 15 December), under 0, 100 and 133 and 0, 67 and 100 kg N ha-1 for early- and late-sowing groups, respectively.

Across environments and genotypes, yield ranged from 2.11 to 4.77 t ha-1(mean: 3.9 t ha-1) under early-sowing, and from 0.83 to 4.27 t ha-1(mean: 2.74 t ha-1) under late-sowing. Wheat performance varied with environment (1.68 - 4.77 t ha-1 at 100 kg N ha-1across sowing groups); the lowest yields found where early sowing was delayed and soil salinity levels were elevated. Small but significant (P less than 0.001) yield differences (0.22 t ha-1) were found between 100 and 133 kg N ha-1 for the early-sowing group, though no difference was found between 67and 100 kg N ha-1 for late-sowing. Combining early- and late-sowing groups, significant environment x N rate and sowing-group x N rate interactions (both P less than 0.001) for 100 kg N ha-1 indicated the importance of site-and time-specific N management in these stress-prone environments.

Considering all cultivars and environments, ECa at sowing, flowering and grain filling negatively correlated with yield (r = - 0.50, - 0.59 and - 0.54, all P less than 0.001). Correlations with ground water depth at flowering and grain filling were negative and significant, but less pronounced in the context of farmer-managed irrigation scheduling. Despite putative stress-tolerance traits in two of the three entries, no genotypic yield differences were found under early-sowing, though small differences (less than 0.19 t ha-1) were observed with late sowing. Agronomic fertilizer-N efficiency (AE-N) was consistently higher for 100 than 133 and 67 than 100 kg N ha-1 for early- and late-sowing. The marginal economic value of N application followed similar trends, indicating that rates of at most 100 and 67 kg N ha-1 are favorable for sowing before or after December 15th.

Keywordswheat (AGROVOC); genotypes (AGROVOC); fallow (AGROVOC); nitrogen fertilizers (AGROVOC); sowing date (AGROVOC); coastal area (AGROVOC); Bangladesh (AGROVOC)
Time Period Covered2011 - 2013
Date of Collection2011 - 2013
Data Availability
Number of Files 3
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"Forgoing the fallow in Bangladesh’s stress-prone coastal deltaic environments: Effect of sowing date, nitrogen, and genotype on wheat yield in farmers’ fields.", hdl:11529/11084