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This is all I could find, I included the link at the bottom.
It is true that baking soda can raise pH, but I do not recommend using it. Chemically, baking soda is Sodium Bicarbonate. High levels of sodium are like trying to grow plants in salted soil. In addition to that, the presence of Sodium compounds will prevent the plants from taking up Calcium.....which will cause all kinds of problems with nutrient deficiencies (Nitrogen is a mobile nutrient, but is only mobile to the plant in the presence of Calcium. Other nutrients will only be taken up by the plants along side Calcium).
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