Water productivity in agriculture needs to be improved significantly in the coming decades to secure food supply to a growing world population. To assess on a global scale where water productivity can be improved and what the causes are for not reaching its potential, the current levels must be u...
Zwart, Sander J.
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Bastiaanssen, Wim G.M.
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Fraiture, Charlotte de
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David, S.
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[WATPRO: a remote sensing based model for mapping water productivity of wheat]
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WATPRO: a remote sensing based model for mapping water productivity of wheat
In the present study, NDVI time-series 10-day composites derived from NOAA AVHRR data were used to estimate bimodal agriculture areas (where there are two seasons of cultivation per annum) using Fourier approach. The NDVI sequence was transformed into harmonic signals and the amplitude and phase ...
Canisius, F.
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Turral, Hugh
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David, S.
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[Fourier analysis of historical NOAA time series data to estimate bimodal agriculture]
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Fourier analysis of historical NOAA time series data to estimate bimodal agriculture
Drawing on results of a survey of Ugandan farmers who previously hosted bean (Phaseolus vulgaris L.) varietal trials, this paper reports on the adoption of three new bush bean cultivars and assesses the usefulness of post-trial surveys as a methodology for obtaining reliable early feedback on var...
David, S.
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Wortmann, Charles S.
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Kasozi, S
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Mugisha-Mutetikka, M
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[Using trial follow-up surveys to assess varietal adoption: The case of beans]
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Using trial follow-up surveys to assess varietal adoption: The case of beans
In many river basins, patterns of water withdrawals, deliveries, depletion, return flows, and reuse are prevalent. These cascading systems, often misunderstood, provide opportunities, but also threats to livelihoods and environment. Different ways of thinking about these cascading systems are req...
David, S.
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Bos, M.G.
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[Improving basin water use in linked agricultural, ecological and urban systems: seeking new flow paths and avoiding dead ends]
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Improving basin water use in linked agricultural, ecological and urban systems: seeking new flow paths and avoiding dead ends
Application of water productivity analysis can provide clues in the search for solutions to solve water management problems of central Asia. It is in this context that this paper provides an analysis of water productivity both spatially and temporally in the cotton and rice production areas of Sy...
Abdullaev, Iskandar
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David, S.
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[Spatial and temporal variability of water productivity in the Syr Darya Basin, Central Asia]
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Spatial and temporal variability of water productivity in the Syr Darya Basin, Central Asia
In its broadest sense, water productivity (WP) is the net return for a unit of water used. Improvement of water productivity aims at producing more food, income, better livelihoods and ecosystem services with less water. There is considerable scope for improving water productivity of crop, livest...
David, S.
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Oweis, Theib Y.
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Steduto, P.
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Bindraban, Prem S.
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Hanjra, Munir A.
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Kijne, J.
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[Improving agricultural water productivity: between optimism and caution]
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Improving agricultural water productivity: between optimism and caution
The Zhanghe Irrigation System (ZIS), in Central China, has drawn attention internationally because it managed to sustain its rice production in the face of a dramatic reallocation of water to cities, industries and hydropower uses. Ponds, the small reservoirs ubiquitous in the area, are hypothesi...
Roost Nicolas
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Xueliang Cai
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David, S.
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Yuanlai Cui
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[Adapting to intersectoral transfers in the Zhanghe Irrigation System, China: Part I - In-system storage characteristics]
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Adapting to intersectoral transfers in the Zhanghe Irrigation System, China: Part I - In-system storage characteristics
There is continuing debate about the role of water productivity and the potential to increase it in response to significantly increased water demand to meet the future needs for food?estimated to be roughly double that of today by 2050. The debate centers round the relative potential benefits of ...
Nangia, Vinay
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Turral, Hugh
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David, S.
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[Increasing water productivity with improved N fertilizer management]
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Increasing water productivity with improved N fertilizer management