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transient salinity

Catalogue: GRDC Final Reports
Transient salinity in soils, characterised by high concentration of salts in the subsoil, varies with depth and changes throughout the season in response to rainfall, surface evaporation, water use by vegetation and the leaching fraction (hydraulic conductivity) of the clay layer... Experiments in our project have shown that transient salinity (accumulation of salt in root zone layers, not influenced by watertable) affects crop yield and growth in dry land regions mainly by reducing water use efficiency of crops through osmotic effect, although toxic effects of individual ions such as sodium can also cause yield reduction... The results indicate that gypsum application improves leaching of salts...
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Catalogue: GRDC 2014 Research Summaries
The problem is even bigger at the global scale, with total cost of salinity estimated over $11 billion per year... Salinity issue will remain one of the key threats to the global food production in the 21st century... The project will contribute to this goal by providing physiological evaluation and mapping appropriate genes conferring two of such traits, namely transpirational control and oxidative stress tolerance, in cereals...
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Catalogue: GRDC Final Reports
Transient salinity (subsoil accumulation of salt and not associated with groundwater hydrology) affects productivity in 67% of the grain growing regions in Australia, costing about $1.3 billion a year... Preliminary estimates by the GRDC project UA463 showed that transient salinity and subsoil constraints affected productivity in 67% of the grain growing areas, costing $1,330 million a year... Validate the results of the modelling process, used in the earlier GRDC project UA463, under field conditions to identify seasonal effects and soil conditions on the occurrence of transient salinity in soil layers...
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