Safe, easy, and economical! Students can perform up to fifty tests each for nitrogen, phosphorus, and potassium levels using non-hazardous TesTabs. Each kit includes the necessary apparatus, simple diagrammed instructions, and a laminated color chart.
The NPK Soil Test Kit was specifically designed to meet the needs of the GLOBE ProgramTM (Global Learning and Observations to Benefit the Environment). This soil test kit is fun to use and easy to ship anywhere! Ideal for upper elementary, middle, and high school students.