Read Online Water Productivity in Rainfed Agriculture: Unesco-Ihe PhD Thesis - Hodson Makurira | PDF
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In rainfed systems where water supply from stored soil water at sowing and in-season rainfall is not enough to meet crop water requirement, water-limited yield potential (yw) is determined by water.
Results indicate that upgrading rain-fed production systems through supplemental irrigation during short dry spells can lead to large increases in water productivity. Downstream implications of increased upstream withdrawals of water for upgrading of rain-fed food production are discussed.
(2007) water productivity in rainfed systems overview of challenges and analysis of opportunities in water scarcity prone savannahs.
Most data were distributed around the mean water productivity function, except in a few cases where rainfed crops were exposed to severe water stress around the silking period. Some site-year observations exhibited very high water productivity at high yield and water supply levels, espe-.
In - buy water productivity in rainfed agriculture: redrawing the rainbow of water to achieve food security in rainfed smallholder systems (ihe delft.
16 mar 2020 this study aimed to analyze the water saving potential of replacing the traditional, furrow-irrigated banana crop in the curu-pentecoste irrigated.
And water productivity of subsurface drip-irrigated and rainfed maize subsurface drip irrigation, water use efficiency, yield production functions.
Water productivity in rainfed agriculture redrawing the rainbow of water to achieve food security in rainfed smallholder systems. [hodson makurira] -- the challenge of water scarcity as a result of insufficient seasonal rainfall and dry spell occurrences during cropping seasons is compounded by inefficient agricultural practices by smallholder.
Rainfed maize and wheat water productivity (wp) was assessed at local to regional scale. • water-limited potential wp varied across regions with different climate and soil. • average wp gap was 47% (maize) and 51% (wheat) of potential wp across regions. • variation in potential wp across regions warns against use of fixed wp benchmarks.
Watershed management practices aim at improving the agricultural productivity in rainfed agricultural areas by conserving rainwater for an extended period.
Water resources to support rainfed and irrigated agriculture also are under pressure, making the efficiency with which water is converted to food, water.
Supplemental irrigation for improved rainfed agriculture in wana region.
10 may 2017 master class 2: water productivity in rainfed agriculture and horticulture.
However, it concluded that there was much opportunity to raise the productivity of rainfed farming.
24 feb 2020 water productivity and footprint of major brazilian rainfed crops – a spatially explicit analysis of crop management scenarios.
) is grown as a rainfed crop in the sub-mountainous region of the punjab state of india, with low crop and water productivity. The present study aims to assess the effect of climate change scenario (a1b) derived from precis-a regional climate model-on wheat yield and water productivity.
Keywords: epic; gis; irrigated and rainfed production; virtual water trade.
These results indicate that upgrading rainfed production systems through supplemental irrigation during short dry spells can lead to large increases in water productivity. Downstream implications of increased upstream withdrawals of water for upgrading of rainfed food production are discussed.
Analysis of spatial and temporal variations in crop water productivity of the rainfed wheat for a regional scale analysis. Water productivity is a suitable indicator in water potential analysis at a location. Hence in this study, changes in water use and productivity are studied in spatial and temporal scale simultaneously.
Productivity of sorghum grown under a rainfed regime, and the water-use ef-ficiency of crops in the semiarid region of - the northeast of brazil. The work was carried out in the city of tabuleiro do norte in the semi-arid region of the state of ceará.
Integrated farm-level approaches to improve water productivity in rainfed and irrigated production om team water management is most effective when combined with optimal use of inputs and good crop management.
The majority of the population is therefore not directly benefiting from developed water resources but are, in fact, subsistence rainfed farmers. Thus, in sub-saharan africa, techniques which help to improve water productivity (wp) can assist in alleviating the impacts of water scarcity especially for crop production purposes.
Water productivity in rainfed agriculture (ihe delft phd thesis series) [makurira, hodson] on amazon. Water productivity in rainfed agriculture (ihe delft phd thesis series).
Without water productivity (wp) gains, the additional freshwater in agriculture will amount to 5,600 km3 year−1 in 2050. This paper focuses on the underlying processes and future opportunities of wp gains in water scarcity prone and poverty stricken savannah regions of the world.
25 jan 2007 green wp (actual evapotranspiration loss in m3 per produced ton of grain) in rainfed savannah farming systems generally amounts to 1,000–.
29 nov 2020 water productivity in rainfed systems: overview of challenges and analysis of opportunities in water scarcity prone savannahs.
Water productivity in rainfed systems: overview of challenges and analysis of opportunities in water scarcity prone savannahs.
Saturated soil irrigation (ssi) has been reported as a great technique that increases water productivity in fully irrigated rice cultivation.
15 sep 2018 for rainfed crops, yw and wpw are the relevant benchmarks. The denominator of the wpw equation can be crop transpiration,.
3 oct 2018 water supply, management practices and soil properties affect wp and yield. In irrigated maize production, there was no significant correlation.
The main objective of the project is the adoption by farming communities of strategies and tested technologies that optimize the conjunctive use of rainwater and scarce water resources in supplemental irrigation systems for improved and sustainable water productivity in rainfed areas.
Water productivity is a measure of the economic or biophysical gain from the use of a unit of water consumed in crop production. With rising competition of finite water resources, uncertainties linked to climate change and the steady rise in demand for agricultural commodities, increasing water productivity is essential to achieving water and food security.
Topics: water productivity, system innovations, water partitioning, food security, semi-arid, rainfed agriculture, ert, hydrus2d.
11 nov 2014 some authors call for increasing the 'crop per drop' or 'value per drop,' generated with water in agriculture in rainfed and irrigated settings.
Use of wp originated in irrigated systems, broadly out of a frustration with the ambiguity of concepts of irrigation efficiency (secker and molden, 2003).
Scientific water management, farm pond based irrigation management system and irrigation methods including high tech irrigation are discussed in this.
The supply of water for rainfed crop production is primarily controlled by the seasonal pattern (summer or winter dominance), by intensity of precipitation and its interaction with the absorptive.
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