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Thread: Understanding Effects Of Water With High Alkalinity

  1. #1

    Understanding Effects Of Water With High Alkalinity

    Hi,

    Did you know that feed water with high alkalinity will substantially raise the medium Ph in the rhizopshere no matter what the Ph of the input water is???

    There seems to be a lot of misunderstanding over ph and alkalinity. I seem to remember posting on this a while back but this article seems a tad more informative and easier to understand.

    I would think this info to be more useful to those of us that rely on groundwater aquifers or well water supplies that dont get tested or get treated to adjust total alkalinity.

    Recently, some growers have expressed concern about the "high pH" of their irrigation water and its potential adverse effects on plants. The purpose of this article is to allay some of these concerns by pointing out the difference between "high pH" and "high alkalinity".

    Alkalinity and pH are two important factors in determining the suitability of water for irrigating plants. pH is a measure of the concentration of hydrogen ions (H+) in water or other liquids. In general, water for irrigation should have a pH b etween 5.0 and 7.0. Water with pH below 7.0 is termed "acidic" and water with pH above 7.0 is termed "basic"; pH 7.0 is "neutral".

    Sometimes the term "alkaline" is used instead of "basic" and often "alkaline" is confused with "alkalinity". Alkalinity is a measure of the water's ability to neutralize acidity. An alkalinity test measures the level of bicarbonates, carbonates, and hydroxides in water and test results are generally expressed as "ppm of calcium carbonate (CaCO3)". The desirable range f or irrigation water is 0 to 100 ppm calcium carbonate. Levels between 30 and 60 ppm are considered optimum for most plants.


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