Rapitest Soil Test - pH N P K
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Kit Contains 40 Tests - 10ea for pH, Nitrogen, Phosphorus & Potash.
Determining whether your soil pH needs adjusting or if nitrogen, phosphorus and potash should be added in the form of fertilizers. Easy to use, just mix soil and water together, pour off solution into comparator, pour in the powder from the capsule, shake and compare to color chart.