Acid conditioning machine is used for pretreatment of irrigation water source, each grower's water source is different, some water sources contain relatively high HCO3- ions, if not pre-conditioned acid, it will cause the irrigation water after the completion of fertilizer distribution, sampling and testing of PH and EC is appropriate, but after sampling the crop root clearing arrows, it is found that the PH is high, mainly due to the HCO3- ions in the source of the water and the reaction of H+ to form H2CO3 meets air and produces CO2 and H20, causing the added H+ to be consumed and the PH to rise.

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