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LaMotte N-P-K Soil Test Kit. For upper elementary, middle, and high school students. Students can perform up to 50 safe, easy, hands-on tests for nitrogen, phosphorus, and potassium levels using nonhazardous TesTabÂ® testers. Each kit includes the necessary apparatus, simple diagrammed instructions, and laminated color chart. Specifically designed to meet The GLOBE (Global Learning and Observations to Benefit the Environment) ProgramÂ® standards./! WARNING: LaMotteÂ® products are not toys. Adult supervision is strongly recommended. Products may contain ingredients that require additional safety precautions; refer to all safety guidelines and Material Safety Data Sheets contained on the MSDS CD or at www.lamotte.com. LaMotte N-P-K Soil Test Kit