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 Program™ (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.