1601 Rapitest Soil Kit for pH, Nitrogen, Phosphorus, & Potash - 40 Tests

1601 Rapitest Soil Kit for pH, Nitrogen, Phosphorus, & Potash. Why Choose the 1601 Rapitest Soil Kit?. Quick and easy results for Soil pH, Nitrogen, Phosphorus, and Potash. Includes all necessary components for up to 40 tests: 10 tests each for pH, Nitrogen (N), Phosphorus (P), and Potassium (K).

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