Your search found 7 records
1 Dubey, S. K.; Mondal, R. C.; Gupta, S. K. 1990. Some aspects of water management of pitcher irrigation. In Tyagi, N. K.; Joshi, P. K.; Gupta, R. K.; Singh. N. T. (Eds.) Management of irrigation system: Papers from the National Symposium on Management of Irrigation System, Karnal, India February 24-27 1988. Karnal, India: Central Soil Salinity Research Institute. pp.81-86.
(Location: IWMI-HQ Call no: 631.7 G635 TYA Record No: H08198)
2 Dubey, S. K.; Mondal, R. C. 1994. Effect of amendments and saline irrigation water on soil properties and yields of rice and wheat in a highly sodic soil. Journal of Agricultural Science, 122:351-357.
Salinity ; Sodic soils ; Soil properties ; Irrigation water ; Water quality ; Rice ; Wheat ; Crop yield ; Infiltration / India
(Location: IWMI-HQ Call no: P 3718 Record No: H016177)
3 Gupta, S. K.; Dubey, S. K.. 2002. Pitcher irrigation for water conservation and use of saline water in vegetable production. Indian Farming, 51(9):33-34, 36.
Pitcher irrigation ; Water conservation ; Irrigation water ; Salinity ; Vegetables ; Crop production
(Location: IWMI-HQ Call no: P 6053 Record No: H030373)
4 Minhas, P. S.; Khajanchi -Lal; Yadav, R. K.; Dubey, S. K.; Chaturvedi, R. K. 2015. Long term impact of waste water irrigation and nutrient rates: I. performance, sustainability and produce quality of peri urban cropping systems. Agricultural Water Management, 156:100-109. [doi: https://doi.org/10.1016/j.agwat.2015.03.012]
Wastewater irrigation ; Groundwater irrigation ; Nutrients ; Peri-urban agriculture ; Cropping systems ; Agroforestry systems ; Soils ; Fertilizer application ; Agricultural production ; Product quality ; Crop yield ; Sustainability ; Farmers / India / Karnal
(Location: IWMI HQ Call no: e-copy only Record No: H047503)
(0.90 MB)
Farmers in peri-urban areas of developing countries depend on wastewaters for their livelihood but with grave health and environmental risks. An 8-year field experiment compared food grain (FGPS), agroforestry (AFS), fodder (FPS) and vegetable (VPS) production systems and quantified responses to fertilizers (NP 25–100%) when irrigated with sewage (SW; EC 1.3 ± 0.3 dS m-1 BOD 82 ± 11, NO3–N 3.2 ± 0.4, NH4–N 9.6 ± 0.5, P 1.8 ± 0.3, K 6.4 ± 0.4 mg L-1) vis-à-vis groundwater (GW). Productivity improved with SW by 14–28% while trends were negative with sub-optimal NP under GW. Partial factor productivity (PFP) averaged 18.0, 11.1, 157 and 149 kg kg-1 NP with GW in FGPS, AFS, FPS and VPS, respectively. Counter figures were 13.8, 8.8, 96 and 56 kg kg-1 NP with SW. Paddy-wheat equivalent yields were 5.5, 1.8 and 19.9 fold under AFS, FPS and VPS with SW. About 40, 33, 75 and 20% of fertilizer NP with SW was sufficient for similar production as with recommended NP and GW in FGPS, AFS, FPS and VPS, respectively. Quality of produce improved in terms of crude protein and the micronutrients in edible parts with SW while toxic metals were within the permissible limits. However, the keeping quality of vegetables was lowered due to faster decay with pathogens contamination (Aerobic bacterial plate counts 5 × 105–4.2 × 108 cfu g-1 and Escherichia coli <2 × 102–7 × 105). Thus, the sewage proved as a vital resource in improving productivity, sustainability and saving fertiliser costs but this may pose health risks because of pathogenic infestation that need to be regulated.
5 Dubey, S. K.; Sharma, D.; Babel, M. S.; Mundetia, N. 2020. Application of hydrological model for assessment of water security using multi-model ensemble of CORDEX-South Asia experiments in a semi-arid river basin of India. Ecological Engineering, 143:105641. [doi: https://doi.org/10.1016/j.ecoleng.2019.105641]
Water security ; Hydrology ; Models ; Semiarid zones ; Water resources ; River basins ; Climate change ; Water availability ; Water yield ; Precipitation ; Evapotranspiration ; Soils ; Meteorological factors / India / Rajasthan / Banas River Basin
(Location: IWMI HQ Call no: e-copy only Record No: H049554)
(4.73 MB)
This study analyses the impacts of climate change on water resources in the Banas River Basin, which is located in a semi-arid part of the state of Rajasthan in India. A bias-corrected ensemble mean of three CORDEX-SA driving GCM experiments (CNRM-CM5, CCSM4, and MPI-ESM-LR) was used with the Soil Water Assessment Tool (SWAT) to predict water yield and evapotranspiration for three future periods (2011–2040, 2041–2070, and 2071–2099) under two representative concentration pathway scenarios (RCP4.5 and RCP8.5), and the results were compared with the data of a historical period (1979–2008). The SUFI-2 method was used for the calibration and validation of the SWAT model. The model was calibrated for the period of five years (1982–1986) and validated for the next five years (1987–1991). The values of R2, NSE, bR2, PBIAS, and RSR were, respectively, 0.78, 0.77, 0.61, 47.4 and 0.48 during the calibration period, and 0.71, 0.65, 0.60, 72.1 and 0.59 during the validation period. Trend analysis was also performed for annual future predicted flows using the Sen Slope method. From the results, it can be predicted that precipitation, evapotranspiration, and water yield will increase in all the three future periods under both RCP4.5 and RCP8.5. Water availability in the future in the basin (zone wise) was identified using appropriate indicators. Per-capita water availability and meteorological variation were used to calculate future water availability and, considering these indicators, it can be concluded that zone 3 will better than the other zones. Zone 3 exhibits high values of per capita water availability and meteorological variation. This study will be useful in understanding the impacts of climate change on the water availability of the river basin and may help in overall water management in the present and the future.
6 Kumar, P.; Singh, S. S.; Pandey, A. K.; Singh, R. M.; Srivastava, P. K.; Kumar, M.; Dubey, S. K.; Sah, U.; Nandan, R.; Singh, S. K.; Agrawal, P.; Kushwaha, A.; Rani, M.; Biswas, J. K.; Drews, M. 2021. Multi-level impacts of the COVID-19 lockdown on agricultural systems in India: the case of Uttar Pradesh. Agricultural Systems, 187:103027. (Online first) [doi: https://doi.org/10.1016/j.agsy.2020.103027]
Farming systems ; COVID-19 ; Pandemics ; Agricultural sector ; Economic impact ; Food systems ; State intervention ; Sustainable development ; Food security ; Markets ; Farmers ; Labour ; Communities ; Policies ; Case studies / India / Uttar Pradesh
(Location: IWMI HQ Call no: e-copy only Record No: H050147)
(3.65 MB)
When on March 24, 2020 the Government of India ordered a complete lockdown of the country as a response to the COVID-19 pandemic, it had serious unwanted implications for farmers and the supply chains for agricultural produce. This was magnified by the fact that, as typically in developing countries, India's economy is strongly based on farming, industrialization of its agricultural systems being only modest. This paper reports on the various consequences of the COVID-19 lockdown for farming systems in India, including the economy, taking into account the associated emergency responses of state and national governments. Combining quantitative and qualitative sources of information with a focus on the Indian state of Uttar Pradesh, including expert elicitation and a survey of farmers, the paper identifies and analyzes the different factors that contributed to the severe disruption of farming systems and the agricultural sector as a whole following the lockdown. Among other issues, our study finds that the lack of migrant labor in some regions and a surplus of workers in others greatly affected the April harvest, leading to a decline in agricultural wages in some communities and an increase in others, as well as to critical losses of produce. Moreover, the partial closure of rural markets and procurement options, combined with the insufficient supply of products, led to shortages of food supplies and dramatically increased prices, which particularly affected urban dwellers and the poor. We argue that the lessons learned from the COVID-19 crisis could fuel the development of new sustainable agro-policies and decision-making in response not only to future pandemics but also to the sustainable development of agricultural systems in India and in developing countries in general.
7 Varshney, Deepak; Joshi, P. K.; Kumar, A.; Mishra, A. K.; Dubey, S. K.. 2022. Examining the transfer of knowledge and training to smallholders in India: direct and spillover effects of agricultural advisory services in an emerging economy. World Development, 160:106067. [doi: https://doi.org/10.1016/j.worlddev.2022.106067]
Agricultural technology ; Information transfer ; Advisory services ; Training ; Capacity development ; Smallholders ; Farmers ; Social networks ; Wheat / India / Uttar Pradesh
(Location: IWMI HQ Call no: e-copy only Record No: H051434)
https://www.sciencedirect.com/science/article/pii/S0305750X22002571/pdfft?md5=451f642c87a9f0528193ce4fe0253a7f&pid=1-s2.0-S0305750X22002571-main.pdf
https://vlibrary.iwmi.org/pdf/H051434.pdf
https://vlibrary.iwmi.org/pdf/H051434.pdf
(0.91 MB) (930 KB)
We evaluate a large-scale model of agricultural advisory services, known as Krishi Vigyan Kendra (KVK) or Farm Science Centers, introduced by the Government of India to facilitate smallholder adoption of new agricultural technologies. The study first evaluates the impact of frontline demonstrations and capacity-building programs conducted by KVKs and aimed at promoting a new wheat variety (HD2967); it then examines gains in the speed of diffusion at the district level. The study’s second objective is to estimate the spillover effects of KVKs through social networks. The study identifies network beneficiaries based on a ‘‘networks within sample” approach. The study uses a matched difference-indifferences approach and sample of 1496 wheat farmers in Uttar Pradesh, India. The finding shows that frontline demonstrations and capacity-building programs positively impact the adoption of HD-2967. The magnitude of the impacts is larger for KVK beneficiaries, but substantial gains also arise for network beneficiaries. The study underscores the importance of frequently conducting interventions to influence adoption on aggregate at the district level. From a policy perspective, the study offers new insights for strengthening outreach and extension services designed to facilitate the transfer of agricultural knowledge and information, emphasizing frontline demonstrations, capacity-building programs, and spillovers in extending the scope of KVKs.
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