Development of Magnesium-Dominant Soils Under Irrigated Agriculture in Southern Kazakhstan
Irrational irrigation practices in the Arys Turkestan Canal command area in the southern part of Kazakhstan have led to the formation of soils with poor physical and chemical properties. To study whether irrigation and leaching practices and/or...
During the past forty years, the Syrian rangelands have been the focal point of government interventions. These had four major components: assertion of state ownership over rangelands, settlement and transformation of herders into farmers...
Environmental and Economic Benefits of Saline-Sodic Soil Reclamation Using Low-quality Water and Soil Amendments in Conjunction with a Rice–Wheat Cropping System
A combination of appropriate crop rotation(s) and management interventions has the potential to transform saline-sodic soil and water resources from an environmental burden into an economic asset. We carried out 2-year field studies in the Indus...
Yield and water-production functions of two durum wheat cultivars grown under different irrigation and nitrogen regimes
Wheat (TriticumdurumL.) yields inthe semi-aridregions are limitedby inadequatewater supply late in the cropping season. Planning suitable irrigation strategy and nitrogen fertilizationwith the appropriate crop phenology will produce optimumgrain...
Optimizing supplemental irrigation: Tradeoffs between profitability and sustainability
Water production functions are used to model yield response to various levels of supplemental irrigation (SI), to assess water productivity coefficients, and to identify optimum irrigation under various input–output price scenarios. The SI...
Pb is one of the most widespread and metal pollutants in soil. It is generally concentrated in surface layers with only a minor portion of the total metal found in soil solution. Phytoextraction has been proposed as an inexpensive, sustainable...
Detection of Wheat Stem Rust (Puccinia graminis f. sp. tritici) Race TTKSK (Ug99) in Iran
In 2007, new reports of stem rust caused by Puccinia graminis Pers. f. sp. tritici Eriks. in Lorestan and Hamadan provinces of Iran were considered unusual because stem rust had not been recorded previously in the Hamadan area where winter habit...
Yield Gap Analysis: Modelling of Achievable Yields at Farm Level
The world population is expected to reach about 8 billion by 2025 (United Nations, 2006), before it stabilizes at about 10-11 billion towards the end of the 21st century. Most of this increase in population is expected to occur in less-developed...
Modelling surface runoff and water productivity in small dryland watersheds with water-harvesting interventions, an application from Jordan
Vast areas of the rangelands (badia) of West Asia and North Africa are severely degraded due to over-grazing, cutting of shrubs and ploughing. Because of the scarce vegetation cover and the often dense soil surface crust, a large part of the...
This issue of Caravan describes some of ICARDA's work on climate change. It contains overviews of the key issues, and articles describing research in specific areas. We examine, for example, how genetic resources – landrace varieties, wild...
