Water is crucial element of our food and materials ... Only1% of the water is available for human consumption. ... distinguish between water quality and ...
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Water and Development: The Importance of Irrigation in Developing Countries
Karina Schoengold and David Zilberman
Water quality concerns -water born diseases
of yield variance is within field
The high yields of irrigations may reflect climatic effects-desert areas have higher sun energy and degree days that with irrigation leads to higher yields
Modern irrigation and pumping modify ranking and values of land- irrigation technologies is water quality augmenting.
Blocking migration of native species
Efficient investment in irrigation projects
The world’s 7500 desalting plants can produce 0.1% of the world’s water use. Price of desalinated water is between $.70-$1.00 per M3.
Reclaimed water may be produced at a cost of 30 to 40 cents per cubic meter., Partially reclaimed water is used in production of industrial crops such as cotton.
For cotton and certain vegetables, yield levels can be maintained if high quality water is used early in the life of a plant and more saline water is applied towards the end of the season.