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Is it possible to use sea water for irrigation ?

Should we necessarily desalinate it before using it, or it can be used directly?  

4 Answers

  • 2 months ago

    It is very expensive to desalinate as even Reverse Osmosis units have 40-45% recovery and generate lot of concentrated waste water whose disposal is a problem.

    It is necessary to desalinate the water.

    Look at rain-water capture and storage, use methods like drip-irrigation or micro-irrigation or methods like ponics or vertical farming. Grow crops that use less amount of water instead of a crop like sugarcane. The world has lot of patients of diabetes and obesity and dont need to eat cane sugar.

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  • Mark
    Lv 7
    3 months ago


    The Salt content would ruin most if

    not all tcrop's which need fresh water to

    truly grow & nourish their own being :)


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  • Speed
    Lv 7
    3 months ago

    In history, invading armies would salt the fields precisely because it killed whatever was growing there and prevented future crops until there'd been enough rain to dilute the salt, which could take years. Opposing armies and the local population might then be starved into submission.

    Using seawater for irrigation is simply a more efficient way of salting the fields. The cost of desalinization would exceed the value of the crop yield.

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  • 3 months ago

    Unless you are irrigating marine plants (i.e. seaweed), it won't work. Sea water contains far too much salt for most plants and will kill them. 

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