Person: Majumdar, K.
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Majumdar
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K.
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Majumdar, K.
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0000-0001-6931-8170 8 results
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- Rebalancing global nitrogen management to address the food-fertilizer-climate crisis(CIMMYT, 2024) Sapkota, T.; Snapp, S.S.; Mukherji, A.; Majumdar, K.; Tai McClellan Maaz; Ray, D.K.; Singh, U.; Gerard, B.; Vanlauwe, B.; Lapidus, D.; Sonder, K.; Odhong, J.A.; Konath, N.C.
Publication - Site-specific nutrient management: Its evolution and dissemination in South Asia (Webinar session 6)(CIMMYT, 2023) Majumdar, K.
Publication - Meta-analysis of yield and nitrous oxide outcomes for nitrogen management in agriculture(Wiley, 2021) Maaz, T.M.; Sapkota, T.; Eagle, A.J.; Kantar, M.B.; Bruulsema, T.W.; Majumdar, K.
Publication - Crop nutrient management using Nutrient Expert improves yield, increases farmers’ income and reduces greenhouse gas emissions(Nature Publishing Group, 2021) Sapkota, T.; Jat, M.L.; Dharamvir Singh Rana; Khatri-Chhetri, A.; Jat, H.S.; Bijarniya, D.; Sutaliya, J.M.; Kumar, M.; Singh, L.K.; Jat, R.K.; Kalvaniya, K.C.; Prasad, G.; Sidhu, H.S.; Rai, M.; Satyanarayana, T.; Majumdar, K.
Publication - Maize yield in smallholder agriculture system—An approach integrating socio-economic and crop management factors(Public Library of Science, 2020) Dutta, S.; Chakraborty, S.; Goswami, R.; Banerjee, H.; Majumdar, K.; Bin Li; Jat, M.L.
Publication - Understanding biophysical and socio-economic determinants of maize (Zea mays L.) yield variability in eastern India(Elsevier, 2014) Banerjee, H.; Goswami, R.; Chakraborty, S.; Dutta, S.; Majumdar, K.; Satyanarayana, T.; Jat, M.L.; Zingore, S.The aim of this paper was to investigate the key factors limiting maize (Zea mays L.) productivity in eastern India to develop effective crop and nutrient management strategies to reduce yield gap. A series of farm surveys was conducted in two distinct agro-ecological zones of eastern India to evaluate the importance of crop management and structural constraints for maize productivity in a range of socio-economic settings prevalent in smallholder farms. Surveys revealed yield gap and yield variations among farms across growing seasons. Lower yields of farmers were mainly associated with farmer's ethnic origin, availability of family labor, land ownership, legumes in cropping sequence, irrigation constraints, seed type, optimal plant population, labor and capital investment, and use of organic manure. These constraints varied strongly between sites as well as growing seasons. Stochastic Frontier Analysis suggested intensification of farm input use and removal of socio-economic and structural constraints for increasing efficiency in maize production. The use of multivariate classification and regression tree analysis revealed that maize yield was affected by multiple and interacting production constraints, differentiating the surveyed farms in six distinct resource groups. These farm types lend scope for introducing typology-specific crop management practices through appropriate participatory on-farm evaluation/trials. Summarily, this research indicated that interacting production constraints should be addressed simultaneously, considering the need of different farm types, if significant productivity improvements are to be achieved. This will be, however, more challenging for less endowed farms due to lack of social and financial capital to improve management intensity.A typology-specific farm support strategy may be formulated to offset this lack of entitlement among resource-poor farmers.
Publication - Potassium supplying capacity of diverse soils and K-use efficiency of maize in South Asia(MDPI, 2018) Saiful Islam; Timsina, J.; Muhammad Salim; Majumdar, K.; Gathala, M.K.Increased nutrient withdrawal by rapidly expanding intensive cropping systems, in combination with imbalanced fertilization, is leading to potassium (K) depletion from agricultural soils in Asia. There is an urgent need to better understand the soil K-supplying capacity and K-use efficiency of crops to address this issue. Maize is increasingly being grown in rice-based systems in South Asia, particularly in Bangladesh and North East India. The high nutrient extraction, especially K, however, causes concerns for the sustainability of maize production systems in the region. The present study was designed to estimate, through a plant-based method, the magnitude, and variation in K-supplying capacity of a range of soils from the maize-growing areas and the K-use efficiency of maize in Bangladesh. Eighteen diverse soils were collected from several upazillas (or sub-districts) under 11 agro-ecological zones to examine their K-supplying capacity from the soil reserves and from K fertilization (100 mg K kg−1 soil) for successive seven maize crops grown up to V10–V12 in pots inside a net house. A validation field experiment was conducted with five levels of K (0, 40, 80, 120 and 160 kg ha−1) and two fertilizer recommendations based on “Nutrient Expert for Maize-NEM” and “Maize Crop Manager-MCM” decision support tools (DSSs) in 12 farmers’ fields in Rangpur, Rajshahi and Comilla districts in Bangladesh. Grain yield and yield attributes of maize responded significantly (p < 0.001) to K fertilizer, with grain yield increase from 18 to 79% over control in all locations. Total K uptake by plants not receiving K fertilizer, considered as potential K-supplying capacity of the soil in the pot experiment, followed the order: Modhukhali > Mithapukur > Rangpur Sadar > Dinajpur Sadar > Jhinaidah Sadar > Gangachara > Binerpota > Tarash > Gopalpur > Daudkandi > Paba > Modhupur > Nawabganj Sadar > Shibganj > Birganj > Godagari > Barura > Durgapur. Likewise, in the validation field experiment, the K-supplying capacity of soils was 83.5, 60.5 and 57.2 kg ha−1 in Rangpur, Rajshahi, and Comilla, respectively. Further, the order of K-supplying capacity for three sites was similar to the results from pot study confirming the applicability of results to other soils and maize-growing areas in Bangladesh and similar soils and areas across South Asia. Based on the results from pot and field experiments, we conclude that the site-specific K management using the fertilizer DSSs can be the better and more efficient K management strategy for maize.
Publication - Book of extended summaries: national dialogue on efficient nutrient management for Improving soil health(TAAS, 2015) Majumdar, K.; Sikka, A.K.; Paroda, R.S.; Mcdonald, A.; Jat, M.L.Improving soil health is a national mission and deliberating on such a topical issues through national dialogue is a collective wisdom of the organizers. Our sincere appreciations to the senior management of the organizing institutions; TAAS, ICAR, CIMMYT, IPNI, CSISA and FAI for their unconditional financial and technical support to organize such an event at the time when global community is celebrating “International Year of Soils”. We are more than confident that such a national dialogue will create awareness among large number of researchers, land users, civil society and policy planners about the soil health and help in developing an ‘actionable road map’ to contribute to the national mission on soil health. We thankfully acknowledge the overwhelming response and commitment of all the distinguished chairs, co-chairs, panelists, speakers and facilitators of various sessions whose intellectual power will make the difference in meeting the objectives of the dialogue. Our heartfelt thanks to the Chair, co-chair and members of the organizing committee and technical committee of the event for their dedicated efforts in organizing this national event. We sincerely acknowledge the support of Director IARI, secretary ICAR and Secretary DARE & Director General ICAR for extending the conference facilities for this event. Excellent logistic and administrative support received from Ms. Tripti Agarwal (CIMMYT), Ms. Simmi Dogra (TAAS) and Mr. Kailash Kalwania (CIMMYT) is highly appreciated.
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