Your search found 5 records
1 Nangia, V.. 2005. Field and watershed scale evaluation of water quality trends due to changes in landscape and management practices. Dissertation submitted to the Faculty of the Graduate School of the University of Minnesota, for the Ph.D. in Water Resources Science. xiv, 137p.
Water quality ; Models ; Calibration ; Hydrology ; Watersheds ; Water budget ; Nitrogen ; Water table ; Fertilizers ; Nitrate ; Drainage ; Drains ; Tillage ; Cropping systems / USA / Minnesota / Nicollet County / Seven Mile Creek Watershed / Mississippi
(Location: IWMI-HQ Call no: D 333.91 G430 NAN Record No: H038430)
2 Molden, David; Oweis, T. Y.; Pasquale, S.; Kijne, J. W.; Hanjra, M. A.; Bindraban, P. S.; Bouman, B. A. M.; Cook, S.; Erenstein, O.; Farahani, H.; Hachum, A.; Hoogeveen, J.; Mahoo, H.; Nangia, V.; Peden, D.; Sikka, A.; Silva, P.; Turral, Hugh; Upadhyaya, A.; Zwart, S. 2007. Pathways for increasing agricultural water productivity. In Molden, David (Ed.). Water for food, water for life: a Comprehensive Assessment of Water Management in Agriculture. London, UK: Earthscan; Colombo, Sri Lanka: International Water Management Institute (IWMI). pp.279-310.
Water use ; Productivity ; Crop production ; Evapotranspiration ; Water delivery ; Irrigation management ; Fisheries
(Location: IWMI HQ Call no: IWMI 630.7 G000 IWM Record No: H040200)
(2.06 MB)
3 Qadir, Manzoor; Quillerou, E.; Nangia, V.; Murtaza, G.; Singh, M.; Thomas, R. J.; Drechsel, Pay; Noble, Andrew D. 2014. Economics of salt-induced land degradation and restoration. Natural Resources Forum, 38:282-295. [doi: https://doi.org/10.1111/1477-8947.12054]
Land degradation ; Land reclamation ; Land reform ; Soil salinity ; Economic aspects ; Costs ; Irrigated land ; Crop yield
(Location: IWMI HQ Call no: e-copy only Record No: H046675)
(0.14 MB)
Food security concerns and the scarcity of new productive land have put productivity enhancement of degraded lands back on the political agenda. In such a context, salt-affected lands are a valuable resource that cannot be neglected nor easily abandoned even with their lower crop yields, especially in areas where significant investments have already been made in irrigation and drainage infrastructure. A review of previous studies shows a very limited number of highly variable estimates of the costs of salt-induced land degradation combined with methodological and contextual differences. Simple extrapolation suggests that the global annual cost of salt-induced land degradation in irrigated areas could be US$ 27.3 billion because of lost crop production. We present selected case studies that highlight the potential for economic and environmental benefits of taking action to remediate salt-affected lands. The findings indicate that it can be cost-effective to invest in sustainable land management in countries confronting salt-induced land degradation. Such investments in effective remediation of salt-affected lands should form part of a broader strategy for food security and be defined in national action plans. This broader strategy is required to ensure the identification and effective removal of barriers to the adoption of sustainable land management, such as perverse subsidies. Whereas reversing salt-induced land degradation would require several years, interim salinity management strategies could provide a pathway for effective remediation and further showcase the importance of reversing land degradation and the rewards of investing in sustainable land management.
4 Montanaro, G.; Nangia, V.; Gowda, P.; Mukhamedjanov, S.; Mukhamedjanov, A.; Haddad, M.; Yuldashev, Tulkun; Wu, W. 2021. Heat units-based potential yield assessment for cotton production in Uzbekistan. International Journal of Agricultural and Biological Engineering, 14(6):137-144. [doi: https://doi.org/10.25165/j.ijabe.20211406.4803]
Cotton ; Crop production ; Crop yield ; Yield gap ; Yield potential ; Assessment ; Heat units ; Climate variability ; Agriculture / Uzbekistan
(Location: IWMI HQ Call no: e-copy only Record No: H050907)
https://ijabe.org/index.php/ijabe/article/download/4803/pdf
https://vlibrary.iwmi.org/pdf/H050907.pdf
https://vlibrary.iwmi.org/pdf/H050907.pdf
(0.77 MB) (792 KB)
Cotton yields in Uzbekistan are significantly lower than those in similar agro-climatic regions, requiring the estimation of crop potential and baseline yield to track progress of production enhancement efforts. The current study estimated potential cotton development and baseline yield (maximum given no production constraints) using total heat units (THU) and potential cotton yield (PCY), respectively. Calculations were based on heat units (HU) for a 30-year (1984-2013) period. Long-term average THU and PCY, as well as PCY at three different exceedance probabilities (p=0.99, p=0.80, and p=0.75), were calculated for 21 selected weather stations across cotton-growing areas of Uzbekistan. After confirmation that the current planting date (April 15) is optimal, a comparison of THU with the accepted cotton production cutoff threshold (1444°C) suggested that areas with lower elevations and latitudes are more appropriate for cotton production. Yield gap analysis (relative difference between long-term average PCY and actual yields) confirmed that Uzbekistan cotton production is below potential, while the spatial distribution of yield gaps outlined where efforts should be targeted. Areas near the stations of Nukus, Kungrad, Chimbay, and Syrdarya should be further investigated as benefit/cost ratio is highest in these areas. A comparison between state-set yield targets and PCY values, taking into account climatic variability, suggested that all areas except Jaslyk, Nurata, and Samarkand have safe, appropriate targets. These results present a starting-point to aid in strategic actions for Uzbekistan cotton production improvement.
5 Laderach, P.; Merrey, D. J.; Schapendonk, F.; Dhehibi, B.; Ruckstuhl, Sandra; Mapedza, Everisto; Najjar, D.; Dessalegn, B.; Amarnath, Giriraj; Nangia, V.; Al-Zu'bi, Maha; Biradar, C.; Pacillo, G.; Govind, A.; Hakhu, A.; Yigezu, Y. A.; Gupta, T. D.; Madurga-Lopez, I.; Lahham, Nisreen; Cosgrove, B.; Joshi, Deepa; Grosjean, G.; Hugh, B.; Elmahdi, Amgad; Frija, A.; Udalagama, Upandha; Nicol, Alan. 2022. Strengthening climate security in the Middle East and North Africa Region. CGIAR FOCUS Climate Security. 80p. (Position Paper No. 2022/3)
Climate change ; Risk ; Agriculture ; Livelihoods ; Migration ; Food prices ; Transboundary waters ; Water management ; Water security ; Water scarcity ; Financing ; Monitoring ; Governance ; Gender equality ; Women's empowerment ; Capacity development / Middle East / North Africa / Morocco / Iran (Islamic Republic of) / Egypt / Jordan
(Location: IWMI HQ Call no: e-copy only Record No: H051658)
https://cgspace.cgiar.org/bitstream/handle/10568/117616/MENA%20Position%20Paper.pdf?sequence=5&isAllowed=y
https://vlibrary.iwmi.org/pdf/H051658.pdf
https://vlibrary.iwmi.org/pdf/H051658.pdf
(5.27 MB) (5.27 MB)
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