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RapiTest Soil Test Kit pH/N-P-K hawthorne and the components are FDA-GRASGet quick, reliable insights into your soil with the RapiTest Soil Test Kita user friendly solution designed to measure pH, Nitrogen (N), Phosphorus (P), and Potassium (K). Whether you're a beginner or seasoned grower, this compact soil test kit helps you learn your soil composition and nutrient levels so you can add the proper fertilizers and amendments to optimize plant health and boost yields. Key Features: Tests for pH, Nitrogen, Phosphorus &