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In soil, pH extremes limit biological activity, humus formation, and plant growth. Frequent monitoring is essential, as soil pH changes rapidly during fertilization, irrigation, and even the phases of the moon. Effective pH monitoring of spray solutions will maximize pesticide effectiveness and nutrient uptake in foliar feeds.
Reference solutions are not included with most meters, although they are necessary to calibrate your meter. For pH, the 7.0 solution is the solution to use for primary calibration. If accurate readings below pH 6.0 are consistently needed, the 4.0 solution is also recommended. For best calibration and accuracy, use both the 7.0 and 4.0 reference solutions.
Get pH information without a meter when you use our soil pH test kits shown here.
Read more on our Soil Test overview page.